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Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2020	Apr. 29, 2020
Cover [Abstract]
Amendment Flag	false
Document Type	10-Q
Document Quarterly Report	true
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Document Transition Report	false
Current Fiscal Year End Date	--12-31
Document Period End Date	Mar. 31, 2020
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity Registrant Name	MKS INSTRUMENTS, INC.
Entity Central Index Key	0001049502
Trading Symbol	MKSI
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		54,964,309
Entity File Number	0-23621
Entity Tax Identification Number	04-2277512
Entity Address, Address Line One	2 Tech Drive, Suite 201,
Entity Address, City or Town	Andover
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01810
Entity Incorporation, State or Country Code	MA
City Area Code	978
Local Phone Number	645-5500
Security Exchange Name	NASDAQ
Title of 12(b) Security	Common Stock

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 442.0	$ 414.6
Short-term investments	61.4	109.4
Trade accounts receivable, net of allowance for doubtful accounts of $1.9 and $1.8 at March 31, 2020 and December 31, 2019, respectively	381.0	341.1
Inventories	474.2	462.1
Other current assets	98.0	106.3
Total current assets	1,456.6	1,433.5
Property, plant and equipment, net	238.2	241.9
Right-of-use asset	127.1	64.5
Goodwill	1,056.4	1,058.5
Intangible assets, net	547.7	564.6
Long-term investments	6.0	5.8
Other assets	42.9	47.5
Total assets	3,474.9	3,416.3
Current liabilities:
Short-term debt	14.3	12.1
Accounts payable	110.7	88.4
Accrued compensation	82.8	100.9
Income taxes payable	14.7	15.4
Lease liability	18.2	20.6
Deferred revenue and customer advances	21.9	21.5
Other current liabilities	59.0	58.8
Total current liabilities	321.6	317.7
Long-term debt, net	820.4	871.7
Non-current deferred taxes	71.6	72.4
Non-current accrued compensation	42.3	43.9
Non-current lease liability	111.6	44.8
Other non-current liabilities	54.9	42.5
Total liabilities	1,422.4	1,393.0
Commitments and contingencies (Note 19)
Stockholders’ equity:
Preferred Stock, $0.01 par value per share, 2,000,000 shares authorized; none issued and outstanding
Common Stock, no par value, 200,000,000 shares authorized; 54,872,983 and 54,596,183 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	0.1	0.1
Additional paid-in capital	852.4	864.3
Retained earnings	1,239.3	1,181.2
Accumulated other comprehensive loss	(39.3)	(22.3)
Total stockholders’ equity	2,052.5	2,023.3
Total liabilities and stockholders’ equity	$ 3,474.9	$ 3,416.3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1.9	$ 1.8
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	54,872,983	54,596,183
Common stock, shares outstanding	54,872,983	54,596,183

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net revenues:
Net revenues	$ 535.7	$ 463.6
Cost of revenues:
Cost of revenues	296.1	265.5
Gross profit	239.6	198.1
Research and development	42.4	38.9
Selling, general and administrative	87.2	82.5
Acquisition and integration costs	2.2	30.2
Restructuring and other	0.4	1.9
Fees and expenses related to repricing of Term Loan Facility		5.8
Amortization of intangible assets	16.3	15.7
Asset impairments	1.2
Income from operations	89.9	23.1
Interest income	0.7	1.7
Interest expense	8.9	9.1
Other expense, net	0.4	0.3
Income before income taxes	81.3	15.4
Provision for income taxes	12.2	2.9
Net income	69.1	12.5
Other comprehensive (loss) income, net of tax:
Changes in value of financial instruments designated as cash flow hedges	(6.0)	0.1
Foreign currency translation adjustments	(11.2)	(4.3)
Unrecognized pension gain	0.1
Unrealized gain (loss) on investments	0.1	(0.1)
Total comprehensive income	$ 52.1	$ 8.2
Net income per share:
Basic	$ 1.26	$ 0.23
Diluted	$ 1.25	$ 0.23
Weighted average common shares outstanding:
Basic	54,918,000	54,147,000
Diluted	55,236,000	54,848,000
Products [Member]
Net revenues:
Net revenues	$ 461.2	$ 397.4
Cost of revenues:
Cost of revenues	256.1	229.7
Services [Member]
Net revenues:
Net revenues	74.5	66.2
Cost of revenues:
Cost of revenues	$ 40.0	$ 35.8

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) [Member]
Beginning Balance at Dec. 31, 2018	$ 1,873.2	$ 0.1	$ 793.9	$ 1,084.8	$ (5.6)
Beginning Balance, Shares at Dec. 31, 2018		54,039,554
Net issuance under stock-based plans	22.5		22.5
Net issuance under stock-based plans, Shares		192,218
Stock-based compensation	27.8		27.8
Cash dividend	(10.9)			(10.9)
Comprehensive income (net of tax):
Net income	12.5			12.5
Other comprehensive loss	(4.3)				(4.3)
Ending Balance at Mar. 31, 2019	1,920.8	$ 0.1	844.2	1,086.4	(9.9)
Ending Balance, Shares at Mar. 31, 2019		54,231,772
Beginning Balance at Dec. 31, 2019	2,023.3	$ 0.1	864.3	1,181.2	(22.3)
Beginning Balance, Shares at Dec. 31, 2019		54,596,183
Net issuance under stock-based plans	(20.4)		(20.4)
Net issuance under stock-based plans, Shares		276,800
Stock-based compensation	8.5		8.5
Cash dividend	(11.0)			(11.0)
Comprehensive income (net of tax):
Net income	69.1			69.1
Other comprehensive loss	(17.0)				(17.0)
Ending Balance at Mar. 31, 2020	$ 2,052.5	$ 0.1	$ 852.4	$ 1,239.3	$ (39.3)
Ending Balance, Shares at Mar. 31, 2020		54,872,983

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Stockholders Equity [Abstract]
Cash dividend, per common share	$ 0.20	$ 0.20

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows provided by operating activities:
Net income	$ 69.1	$ 12.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28.4	25.2
Amortization of inventory step-up adjustment to fair value		5.1
Amortization of debt issuance costs, original issue discount, and soft call premium	1.1	1.2
Stock-based compensation	8.5	27.8
Provision for excess and obsolete inventory	6.2	5.1
Provision for doubtful accounts	0.2	(0.4)
Deferred income taxes	0.6	(2.4)
Asset impairments	1.2
Other	(0.1)
Changes in operating assets and liabilities, net of business acquired:
Trade accounts receivable	(42.5)	4.0
Inventories	(20.3)	(10.3)
Income taxes	1.0	(3.7)
Other assets	10.1	4.8
Accrued compensation	(19.3)	(22.9)
Other liabilities	8.0	0.4
Accounts payable	22.7	(17.3)
Net cash provided by operating activities	74.9	29.1
Cash flows provided by (used in) investing activities:
Acquisition of business, net of cash acquired		(988.6)
Purchases of investments	(30.2)	(44.2)
Maturities of investments	49.5	18.6
Sales of investments	28.7	154.5
Proceeds from sale of assets		0.1
Purchases of property, plant and equipment	(10.0)	(14.5)
Net cash provided by (used in) investing activities	38.0	(874.1)
Cash flows (used in) provided by financing activities:
Net proceeds from borrowings	12.1	638.6
Payments on borrowings	(62.2)	(0.2)
Net payments related to employee stock awards	(20.4)	(9.0)
Dividend payments	(11.0)	(10.8)
Net cash (used in) provided by financing activities	(81.5)	618.6
Effect of exchange rate changes on cash and cash equivalents	(4.0)	0.1
Increase (decrease) in cash and cash equivalents	27.4	(226.3)
Cash and cash equivalents at beginning of period	414.6	644.3
Cash and cash equivalents at end of period	$ 442.0	$ 418.0

Basis of Presentation

3 Months Ended

Mar. 31, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Basis of Presentation

1)	Basis of Presentation

The terms “MKS” and the “Company” refer to MKS Instruments, Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The interim financial data as of March 31, 2020, and for the three months ended March 31, 2020 are unaudited; however, in the opinion of MKS, the interim data includes all adjustments, consisting of normal recurring adjustments, necessary for a fair statement of the results for the interim periods. The condensed consolidated balance sheet presented as of December 31, 2019 has been derived from the consolidated audited financial statements as of that date. The unaudited condensed consolidated financial statements presented herein have been prepared in accordance with the instructions to Form 10-Q and do not include all of the information and note disclosures required by United States generally accepted accounting principles (“U.S. GAAP”). The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the MKS Annual Report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission on February 28, 2020.

The preparation of these unaudited condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the date of the unaudited condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. On an on-going basis, management evaluates its estimates and judgments, including those related to revenue recognition, stock-based compensation, inventory, intangible assets, goodwill and other long-lived assets, warranty liabilities, pension liabilities, acquisition expenses and income taxes. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

While the Company’s operations and financial performance in certain areas of its business have been negatively impacted by the coronavirus (“COVID-19”) pandemic, the impact to the Company’s financial results for the first quarter of 2020 was minimal due to the strong demand for its products from its semiconductor customers. The extent to which the COVID-19 pandemic impacts the Company’s financial results and operations for the remainder of 2020 and beyond will depend on future developments that are highly uncertain and cannot be predicted at this time. The Company is not aware of any specific event or circumstance that would require an update to its estimates or judgments or a revision of the carrying value of its assets or liabilities as of the date of issuance of this Quarterly Report on Form 10-Q. These estimates may change, as new events occur and additional information is obtained. Actual results could differ materially from these estimates under different assumptions or conditions.

Recently Issued or Adopted Accounting Pronouncements

3 Months Ended

Mar. 31, 2020

Accounting Changes And Error Corrections [Abstract]

Recently Issued or Adopted Accounting Pronouncements

2)	Recently Issued or Adopted Accounting Pronouncements

In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This standard provides temporary optional expedients and exceptions to accounting guidance on contract modifications and hedge accounting to ease entities’ financial reporting burdens as the market transitions from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. The standard was effective upon issuance and generally can be applied through December 31, 2022. The Company is uncertain of the effects this standard will have on its financial position, results of operations and cash flows.

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740).” This standard simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application and simplify U.S. GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This standard is effective for annual periods beginning after December 15, 2021, including interim periods within those fiscal years beginning after December 15, 2022. The Company evaluated the requirements of this ASU and the impact of pending adoption on the Company’s consolidated financial statements. The Company does not expect that the impact of these changes will be material to its financial position, results of operations and cash flows.

In August 2018, the FASB issued ASU 2018-15, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments to this update. This standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2020 and the adoption of this ASU did not have a material impact on its financial position, results of operations and cash flows.

In June 2016, the FASB issued ASU 2016-13, “Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This standard introduced the expected credit losses methodology for the measurement of credit losses on financial assets that are not measured at fair value through net income and replaces today’s “incurred loss” model with an “expected credit loss” model that requires consideration of a broader range of information to estimate expected credit losses over the lifetime of the asset. There have been several consequential subsequent amendments to this standard. This standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted this ASU during the first quarter of 2020 and the adoption of this ASU did not have a material impact on its financial position, results of operations and cash flows.

Leases

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Leases

The Company has various operating leases for real estate and non-real estate items. The non-real estate leases are mainly comprised of automobiles but also include copiers, printers and other lower-valued items. The Company does not have any finance leases.

During the three months ended March 31, 2020, the Company recorded $69.9 of right-of-use assets and lease liabilities related to two leases that commenced during the period.

The Company has existing leases that include variable lease and non-lease components that are not included in the right-of-use asset and lease liability, and are reflected as expenses in the periods incurred. Such payments primarily include common area maintenance charges and increases in rent payments that are driven by factors such as future changes in an index (e.g., the Consumer Price Index).

The elements of lease expense were as follows:

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Lease Cost:
Operating lease cost⁽¹⁾	$	7.3	$	5.0
Short-term lease		1.2		1.3
Total lease cost	$	8.5	$	6.3

⁽¹⁾

Operating lease cost includes an immaterial amount of variable expenses and sublease rental income.

The weighted average discount rate and the weighted average remaining lease term were 3.2% and 13.5 years, respectively, for the three months ended March 31, 2020. The weighted average discount rate and weighted average remaining lease term were 3.8% and 4.9 years, respectively, for the period ended March 31, 2019. Operating cash flows used for operating leases for the three months ended March 31, 2020 and 2019 were $5.1 and $5.7, respectively.

Future lease payments under non-cancelable leases as of March 31, 2020 are detailed as follows:

2020 (remaining)	$	3.7
2021		18.7
2022		13.3
2023		11.9
2024		11.3
Thereafter		107.4
Total lease payments		166.3
Less: imputed interest		36.5
Total operating lease liabilities	$	129.8

The remaining 2020 lease payment amount of $3.7 is net of $13.7 of tenant improvement allowances expected to be received in 2020. Amounts presented above do not include payments relating to immaterial leases excluded from the balance sheet as part of transition elections adopted upon implementation of ASU 2016-02,“Leases”, on January 1, 2019, as well as operating leases with terms of less than twelve months. Additionally, amounts presented above exclude approximately $24.6 of lease payments (undiscounted basis) related to a lease that has not yet commenced. The lease commences later in 2020 with an expected lease term of 21 years.

Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Revenue from Contracts with Customers

4)	Revenue from Contracts with Customers

Contract assets as of March 31, 2020 and December 31, 2019 were $3.4 and $3.5, respectively, and are included in other current assets.

A rollforward of the Company’s deferred revenue and customer advances is as follows:

	Three Months Ended			Three Months Ended
	March 31, 2020			March 31, 2019
Beginning balance, January 1⁽¹⁾	$	24.8		$	17.5
Deferred revenue and customer advances in ESI Merger		—			3.3
Additions to deferred revenue and customer advances		17.7			17.2
Amount of deferred revenue and customer advances recognized in income		(17.1	)		(13.9	)
Ending balance, March 31⁽²⁾	$	25.4		$	24.1

⁽¹⁾

Beginning deferred revenue and customer advances as of December 31, 2019 included $12.4 of current deferred revenue, $3.3 of long-term deferred revenue and $9.1 of current customer advances.

⁽²⁾

Ending deferred revenue and customer advances as of March 31, 2020 included $12.4 of current deferred revenue, $3.5 of long-term deferred revenue and $9.5 of current customer advances.

Disaggregation of Revenue

The following table summarizes revenue from contracts with customers:

	Three Months Ended March 31, 2020
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	276.2	$	149.7	$	35.3	$	461.2
Services		43.1		15.7		15.7		74.5
Total net revenues	$	319.3	$	165.4	$	51.0	$	535.7

	Three Months Ended March 31, 2019
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	192.7	$	178.7	$	26.0	$	397.4
Services		41.7		15.3		9.2		66.2
Total net revenues	$	234.4	$	194.0	$	35.2	$	463.6

Product revenue, excluding revenue from certain custom products, is recorded at a point in time, while the majority of the service revenue and revenue from certain custom products is recorded over time.

Refer to Note 17 for revenue by reportable segment, geography and product and service offerings.

Investments

3 Months Ended

Mar. 31, 2020

Investments Debt And Equity Securities [Abstract]

Investments

5)	Investments

The following tables show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale investments:

As of March 31, 2020:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	10.4	$	—	$	—		$	10.4
Bankers' acceptance drafts		2.4		—		—			2.4
Commercial paper		26.4		—		(0.2	)		26.2
U.S. treasury obligations		10.0		—		—			10.0
U.S. agency obligations		12.3		0.1		—			12.4
	$	61.5	$	0.1	$	(0.2	)	$	61.4

As of March 31, 2020:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5.4	$	0.6	$	—	$	6.0

As of December 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	13.1	$	—	$	—		$	13.1
Bankers' acceptance drafts		4.0		—		—			4.0
Commercial paper		61.5		—		(0.3	)		61.2
U.S. treasury obligations		5.0		—		—			5.0
U.S. agency obligations		26.1		—		—			26.1
	$	109.7	$	—	$	(0.3	)	$	109.4

As of December 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5.2	$	0.6	$	—	$	5.8

The tables above, which show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale investments as of March 31, 2020 and December 31, 2019, reflect the inclusion within short-term investments of investments with contractual maturities greater than one year from the date of purchase. Management has the ability, if necessary, to liquidate any of its investments in order to meet the Company’s liquidity needs in the next 12 months. Accordingly, those investments with contractual maturities greater than one year from the date of purchase are classified as short-term on the accompanying balance sheets.

The Company reviews and evaluates its investments for any indication of possible impairment. Based on this review, the Company has determined that the unrealized losses related to these investments at March 31, 2020 and December 31, 2019 were temporary.

Interest income is accrued as earned. Dividend income is recognized as income on the date the stock trades “ex-dividend.” The cost of marketable securities sold is determined by the specific identification method. Realized gains or losses are reflected in income and were not material for the three months ended March 31, 2020 and 2019.

Fair Value Measurements

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

6)	Fair Value Measurements

In accordance with the provisions of fair value accounting, a fair value measurement assumes that the transaction to sell an asset or transfer a liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability and defines fair value based upon an exit price model.

The fair value measurement guidance establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance describes three levels of inputs that may be used to measure fair value:

Level 1

Quoted prices in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis.

Level 2

Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments or securities or derivative contracts that are valued using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data.

Level 3

Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the Company categorizes such assets and liabilities based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

Assets and liabilities of the Company are measured at fair value on a recurring basis as of March 31, 2020 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	March 31, 2020		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	16.9	$	16.9	$	—	$	—
Commercial paper		33.8		—		33.8		—
U.S. treasury obligations		1.2		—		1.2		—
U.S. agency obligations		58.4		—		58.4		—
Available-for-sale investments:
Time deposits and certificates of deposit		10.4		—		10.4		—
Bankers' acceptance drafts		2.4		—		2.4		—
Commercial paper		26.2		—		26.2		—
U.S. treasury obligations		10.0		—		10.0		—
U.S. agency obligations		12.4		—		12.4		—
Group insurance contracts		6.0		—		6.0		—
Derivatives – currency forward contracts		2.7		—		2.7		—
Funds in investments and other assets:
Israeli pension assets		16.3		—		16.3		—
Deferred compensation plan assets:
Mutual funds and exchange traded funds		1.2		—		1.2		—
Money market securities		0.1		—		0.1		—
Total assets	$	198.0	$	16.9	$	181.1	$	—
Liabilities:
Derivatives – currency forward contracts	$	0.5	$	—	$	0.5	$	—
Derivatives – interest rate hedge - current		0.5		—		0.5		—
Derivatives – interest rate hedge - non-current		15.2		—		15.2		—
Total liabilities	$	16.2	$	—	$	16.2	$	—
Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	110.3	$	16.9	$	93.4	$	—
Short-term investments		61.4		—		61.4		—
Other current assets		2.7		—		2.7		—
Total current assets	$	174.4	$	16.9	$	157.5	$	—
Long-term investments	$	6.0	$	—	$	6.0	$	—
Other assets		17.6		—		17.6		—
Total long-term assets	$	23.6	$	—	$	23.6	$	—
Liabilities:
Other current liabilities	$	1.0	$	—	$	1.0	$	—
Other liabilities	$	15.2	$	—	$	15.2	$	—

⁽¹⁾

The cash and cash equivalent amounts presented in the table above do not include cash of $331.7 as of March 31, 2020.

Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2019 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	December 31, 2019		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	0.6	$	0.6	$	—	$	—
Time deposits and certificates of deposit		2.2		—		2.2		—
Commercial paper		42.6		—		42.6		—
U.S. treasury obligations		2.7		—		2.7		—
U.S. agency obligations		17.1		—		17.1		—
Available-for-sale securities:
Time deposits and certificates of deposit		13.1		—		13.1		—
Bankers' acceptance drafts		4.0		—		4.0		—
Commercial paper		61.2		—		61.2		—
U.S. treasury obligations		5.0		—		5.0		—
U.S. agency obligations		26.1		—		26.1		—
Group insurance contracts		5.8		—		5.8		—
Derivatives – currency forward contracts		1.1		—		1.1		—
Derivatives –interest rate hedge - current		0.8		—		0.8		—
Funds in investments and other assets:
Israeli pension assets		16.7		—		16.7		—
Deferred compensation plan assets:
Mutual funds and exchange traded funds		2.0		—		2.0		—
Money market funds		0.5		—		0.5		—
Total assets	$	201.5	$	0.6	$	200.9	$	—
Liabilities:
Derivatives – currency forward contracts	$	0.3	$	—	$	0.3	$	—
Derivatives – interest rate hedge - non-current		6.5		—		6.5		—
Total liabilities	$	6.8	$	—	$	6.8	$	—
Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	65.2	$	0.6	$	64.6	$	—
Short-term investments		109.4		—		109.4		—
Other current assets		1.9		—		1.9		—
Total current assets	$	176.5	$	0.6	$	175.9	$	—
Long-term investments	$	5.8	$	—	$	5.8	$	—
Other assets		19.2		—		19.2		—
Total long-term assets	$	25.0	$	—	$	25.0	$	—
Liabilities:
Other current liabilities	$	0.3	$	—	$	0.3	$	—
Other liabilities	$	6.5	$	—	$	6.5	$	—

⁽¹⁾

The cash and cash equivalent amounts presented in the table above do not include cash of $349.4 as of December 31, 2019.

Money Market Funds

Money market funds are cash and cash equivalents and are classified within Level 1 of the fair value hierarchy.

Available-For-Sale Investments

As of March 31, 2020, available-for-sale investments consisted of time deposits and drafts denominated in the Euro currency, certificates of deposit, bankers’ acceptance drafts, commercial paper, U.S. treasury obligations, U.S. agency obligations and group insurance contracts.

The Company measures its debt and equity investments at fair value. The Company’s available-for-sale investments are classified within Level 2 of the fair value hierarchy.

Israeli Pension Assets

Israeli pension assets represent investments in mutual funds, government securities and other time deposits. These investments are set aside for the retirement benefit of the employees at the Company’s Israeli subsidiaries. These funds are classified within Level 2 of the fair value hierarchy.

Derivatives

As a result of the Company’s global operating activities, the Company is exposed to market risks from changes in foreign currency exchange rates and variable interest rates, which may adversely affect its operating results and financial position. When deemed appropriate, the Company minimizes its risks from foreign currency exchange rate and interest rate fluctuations through the use of derivative financial instruments. The principal market in which the Company executes its foreign currency exchange contracts and interest rate swaps is the institutional market in an over-the-counter environment with a relatively high level of price transparency. The market participants usually are large commercial banks. The forward foreign currency exchange contracts and interest rate hedge are valued using broker quotations, or market transactions and are classified within Level 2 of the fair value hierarchy.

Derivatives

3 Months Ended

Mar. 31, 2020

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivatives

7)	Derivatives

The Company enters into derivative instruments for risk management purposes only, including derivatives designated as hedging instruments and those utilized as economic hedges. The Company operates internationally and, in the normal course of business, is exposed to fluctuations in interest rates and foreign exchange rates. These fluctuations can increase the costs of financing, investing and operating the business. The Company has used derivative instruments, such as forward foreign currency exchange contracts, to manage certain foreign currency exposure, and interest rate swaps to manage interest rate exposure.

By nature, all financial instruments involve market and credit risks. The Company enters into derivative instruments with major investment grade financial institutions, for which no collateral is required. The Company has policies to monitor the credit risk of these counterparties. While there can be no assurance, the Company does not anticipate any material non-performance by any of these counterparties.

Interest Rate Swap Agreements

On September 30, 2016, the Company entered into an interest rate swap agreement, which has a maturity date of September 30, 2020, to fix the rate on approximately 50% of its then-outstanding balance under the 2016 Term Loan Facility, as described further in Note 11. This hedge fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 1.75% as of March 31, 2020. At March 31, 2020, the notional amount of this transaction was $250.0 and it had a fair value liability of $0.5. At December 31, 2019, the notional amount of this transaction was $250.0 and it had a fair value asset of $0.8.

On April 3, 2019, the Company entered into an interest rate swap agreement, which has a maturity date of March 31, 2023, to fix the rate on $300.0 of the then-outstanding balance of the 2019 Incremental Term Loan Facility, as described further in Note 11. The rate was fixed at 2.309% per annum plus the applicable credit spread, which was 1.75% at March 31, 2020. At March 31, 2020, the notional amount of this transaction was $300.0 and had a fair value liability of $15.3. At December 31, 2019, the notional amount of this transaction was $300.0 and had a fair value liability of $6.5.

The interest rate swaps are recorded at fair value on the balance sheet and changes in the fair value are recognized in other comprehensive income (loss) (“OCI”). To the extent that these arrangements are no longer an effective hedge, any ineffectiveness measured in the hedging relationships is recorded in earnings in the period it occurs.

Foreign Exchange Contracts

The Company hedges a portion of its forecasted foreign currency-denominated intercompany sales of inventory, over a maximum period of eighteen months, using forward foreign exchange contracts accounted for as cash-flow hedges. To the extent these derivatives are effective in off-setting the variability of the hedged cash flows, and otherwise meet the hedge accounting criteria, changes in the derivatives’ fair value are not included in current earnings but are included in OCI in stockholders’ equity. These changes in fair value will subsequently be reclassified into earnings, as applicable, when the forecasted transaction occurs. To the extent that a previously designated hedging transaction is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded in earnings in the period it occurs. The cash flows resulting from forward exchange contracts are classified in the consolidated statements of cash flows as part of cash flows from operating activities. The Company does not enter into derivative instruments for trading or speculative purposes.

As of March 31, 2020 and December 31, 2019, the Company had outstanding forward foreign exchange contracts with gross notional values of $104.4 and $154.7, respectively. The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of March 31, 2020 and December 31, 2019:

	March 31, 2020
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value
U.S. Dollar/Japanese Yen	$	34.4	$	(0.2	)
U.S. Dollar/South Korean Won		32.5		1.8
U.S. Dollar/Euro		10.1		0.4
U.S. Dollar/U.K. Pound Sterling		5.3		0.3
U.S. Dollar/Taiwan Dollar		22.1		(0.1	)
Total	$	104.4	$	2.2

	December 31, 2019
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value
U.S. Dollar/Japanese Yen	$	45.9	$	0.1
U.S. Dollar/South Korean Won		51.7		0.2
U.S. Dollar/Euro		15.7		0.2
U.S. Dollar/U.K. Pound Sterling		8.3		(0.2	)
U.S. Dollar/Taiwan Dollar		33.1		(0.5	)
Total	$	154.7	$	(0.2	)

The following table provides a summary of the fair value amounts of the Company’s derivative instruments:

Derivatives Designated as Hedging Instruments	March 31, 2020			December 31, 2019
Derivative assets:
Foreign exchange contracts⁽¹⁾	$	2.7		$	1.1
Foreign currency interest rate hedge⁽²⁾		—			0.8
Derivative liabilities:
Foreign exchange contracts⁽¹⁾		(0.5	)		(1.3	)
Foreign currency interest rate hedge⁽²⁾		(15.8	)		(6.5	)
Total net derivative liability designated as hedging instruments	$	(13.6	)	$	(5.9	)

⁽¹⁾

The derivative asset of $2.7 and derivative liability of $0.5 related to the forward foreign exchange contracts are classified in other current assets and other current liabilities in the consolidated balance sheet as of March 31, 2020. The derivative asset of $1.1 and derivative liability of $1.3 related to the forward foreign exchange contracts are classified in other current assets and other current liabilities in the consolidated balance sheet as of December 31, 2019. These

forward foreign exchange contracts are subject to a master netting agreement with one financial institution. However, the Company has elected to record these contracts on a gross basis in the balance sheet.

⁽²⁾

The foreign currency interest rate hedge liability of $0.5 is classified in other current liabilities in the consolidated balance sheet as of March 31, 2020. The foreign currency interest rate hedge asset of $0.8 is classified in other current assets in the consolidated balance sheet as of December 31, 2019. The foreign currency interest rate hedge liability of $15.3 is classified in other non-current liabilities in the consolidated balance sheet as of March 31, 2020. The foreign currency interest rate hedge liability of $6.5 is classified in other non-current liabilities in the consolidated balance sheet as of December 31, 2019.

The net amount of existing gains as of March 31, 2020 that is expected to be reclassified from OCI into earnings within the next 12 months is immaterial.

The following table provides a summary of the (losses) gains on derivatives designated as cash flow hedging instruments:

	Three Months Ended March 31,
Derivatives Designated as Cash Flow Hedging Instruments	2020			2019
Forward exchange contracts:
Net gain (loss) recognized in accumulated OCI⁽¹⁾	$	(6.0	)	$	0.1
Net gain (loss) reclassified from accumulated OCI into income⁽²⁾	$	0.7		$	0.9

⁽¹⁾

^{Net change in the fair value of the effective portion classified in accumulated OCI.}

⁽²⁾

^{Effective portion classified in cost of products for the three months ended March 31, 2020 and 2019. The tax effect of the gains or losses reclassified from accumulated OCI into income is immaterial.}

The following table provides a summary of the gain on derivatives not designated as hedging instruments:

	Three Months Ended March 31,
Derivatives Not Designated as Hedging Instruments	2020		2019
Forward exchange contracts:
Net gain recognized in income⁽¹⁾	$	0.2	$	0.1

⁽¹⁾

^{The Company enters into foreign exchange contracts to hedge against changes in the balance sheet for certain subsidiaries to mitigate the risk associated with certain foreign currency transactions in the ordinary course of business. These derivatives are not designated as hedging instruments and gains or losses from these derivatives are recorded immediately in other (expense) income.}

Inventories

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Inventories

8)	Inventories

Inventories consist of the following:

	March 31, 2020		December 31, 2019
Raw materials	$	300.4	$	288.8
Work-in-process		81.0		79.3
Finished goods		92.8		94.0
	$	474.2	$	462.1

Inventory-related excess and obsolete charges of $6.2 and $5.1 were recorded in cost of products and services in the three months ended March 31, 2020 and 2019, respectively.

Acquisitions

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

Acquisitions

9)	Acquisitions

Electro Scientific Industries, Inc.

On February 1, 2019, the Company completed its acquisition of Electro Scientific Industries, Inc. (“ESI”) pursuant to an Agreement and Plan of Merger, dated as of October 29, 2018 (the “Merger Agreement”), by and among the Company, EAS Equipment, Inc., formerly a Delaware corporation and a wholly-owned subsidiary of the Company, and ESI (the “ESI Merger”). At the effective time of the ESI Merger and pursuant to the terms and conditions of the Merger Agreement, each share of ESI’s common stock that was issued and outstanding immediately prior to the effective time of the ESI Merger was converted into the right to receive $30.00 in cash, without interest and subject to deduction of any required withholding tax.

The Company funded the payment for ESI’s outstanding shares with a combination of the Company’s available cash on hand and the proceeds from the Company’s 2019 Incremental Term Loan Facility, as defined and as described further in Note 11.

ESI provides laser-based manufacturing systems solutions for the micro-machining industry that enable customers to optimize production. ESI’s market is composed primarily of flexible and rigid PCB processing/fabrication, semiconductor wafer processing and passive component manufacturing and testing. ESI solutions incorporate specialized laser technology and proprietary control software to efficiently process the materials and components that are an integral part of electronic devices and systems.

The purchase price of ESI consisted of the following:

Cash paid for outstanding shares⁽¹⁾	$	1,032.7
Settlement of share-based compensation awards⁽²⁾		30.6
Total purchase price		1,063.3
Less: Cash and cash equivalents acquired		(44.1	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019.2

⁽¹⁾

Represents cash paid of $30.00 per share for approximately 34,422,361 shares of ESI common stock, without interest and subject to a deduction for any required withholding tax.

⁽²⁾

Represents the vested but not issued portion of ESI share-based compensation awards as of the acquisition date of February 1, 2019.

Under the acquisition method of accounting, the total estimated acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of ESI based on their fair values as of the acquisition date. Any excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed is allocated to goodwill. None of the goodwill and intangible assets are deductible for tax purposes.

The following table summarizes the final allocation of the purchase price to the fair values assigned to assets acquired and liabilities assumed at the date of the ESI Merger:

Current assets (excluding inventory)	$	208.0
Inventory		81.7
Intangible assets		316.2
Goodwill		474.0
Property, plant and equipment		65.5
Long-term assets		9.6
Total assets acquired		1,155.0
Current liabilities		51.5
Non-current deferred taxes		33.0
Other long-term liabilities		7.2
Total liabilities assumed		91.7
Fair value of assets acquired and liabilities assumed		1,063.3
Less: Cash and cash equivalents acquired		(44.1	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019.2

The fair value write-up of acquired finished goods inventory was $7.6, the amount of which was expensed over the period during which the acquired inventory was sold. Accordingly, for the three months ended March 31, 2019, the Company recorded a $5.1 incremental cost of sales charge associated with the fair value write-up of inventory acquired in the ESI Merger.

The fair value write-up of acquired property, plant and equipment of $39.3 will be amortized over the estimated useful life of the applicable assets, excluding the fair value write-up in the value of land. Property, plant and equipment is valued at its value-in-use, unless there was a known plan to dispose of the asset.

The acquired intangible assets are being amortized on a straight-line basis, which approximates the economic use of the asset.

The following table reflects the allocation of the acquired intangible assets and related estimate of useful lives:

Completed technology - Laser	$	255.7	12 years
Completed technology - Non-Laser		18.3	10 years
Trademarks and trade names		14.4	7 years
Customer relationships		25.4	10 years
Backlog		2.4	1 year
	$	316.2

The fair value of the acquired intangibles was determined using the income approach. In performing these valuations, the key underlying assumptions of the discounted cash flows were projected revenues, gross margin expectations and operating cost estimates. The valuations were based on the information that was available as of the acquisition date and the expectations and assumptions that have been deemed reasonable by the Company’s management. There are inherent uncertainties and management judgment required in these determinations. This acquisition resulted in a purchase price that exceeded the estimated fair value of tangible and intangible assets, the excess amount of which was allocated to goodwill. The Company believes the amount of goodwill relative to identifiable intangible assets relates to several factors, including broadening its position in key industrial end markets to complementary solutions, and leveraging component and systems expertise to provide robust solutions to meet customer evolving technology needs.

The results of this acquisition were included in the Company’s consolidated statement of operations beginning on February 1, 2019. ESI constitutes the Company’s Equipment & Solutions reportable segment (see Note 17).

Certain executives from ESI had severance provisions in their respective ESI employment agreements. The agreements included terms that were accounted for as dual-trigger arrangements. Through the Company’s acquisition accounting, the expense relating to these benefits was recognized in the combined entity’s financial statements. The Company recorded costs of $2.7 and $14.0 in acquisition and integration costs as compensation expense and stock-based compensation expense, respectively, for the three months ended March 31, 2019 associated with these severance provisions. The restricted stock units and stock appreciation rights that were eligible for accelerated vesting if the executive exercised his or her rights but were not issued as of each reporting period-end, were excluded from the computation of basic earnings per share and included in the computation of diluted earnings per share for such reporting period.

Pro Forma Results

The following unaudited pro forma financial information presents the combined results of operations of the Company as if the ESI Merger had occurred on January 1, 2018. The unaudited pro forma financial information is not necessarily indicative of what the Company’s condensed consolidated results of operations actually would have been had the acquisition occurred at the beginning of the year. In addition, the unaudited pro forma financial information does not attempt to project the future results of operations of the combined Company.

	Three Months Ended March 31, 2019
Total net revenues	$	478.1
Net income	$	39.7
Net income per share:
Basic	$	0.72
Diluted	$	0.72

The unaudited pro forma financial information above gives effect primarily to the following:

(1)

Incremental amortization and depreciation expense related to the estimated fair value of identifiable intangible assets and property, plant and equipment, respectively from the purchase price allocation.

(2)

Revenue and cost of goods sold, adjustments as a result of the reduction in deferred revenue and the cost related to their estimated fair value.

(3)

Incremental interest expense related to the Company’s Incremental Term Loan Facility.

(4)

The exclusion of acquisition costs and inventory and demonstration inventory step-up amortization from the three month period ended March 31, 2019.

(5)

The exclusion of debt issuance costs due to the modification of the Incremental Term Loan Facility from the three month period ended March 31, 2019.

(6)

The estimated tax impact of the above adjustments.

Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

10)	Goodwill and Intangible Assets

Goodwill

The Company’s methodology for allocating the purchase price relating to purchase acquisitions is determined through established and generally accepted valuation techniques. Goodwill is measured as the excess of the cost of the acquisition over the sum of the amounts assigned to tangible and identifiable intangible assets acquired less liabilities assumed. The Company assigns assets acquired (including goodwill) and liabilities assumed to one or more reporting units as of the date of acquisition. Typically acquisitions relate to a single reporting unit and thus do not require the allocation of goodwill to multiple reporting units. If the products obtained in an acquisition are assigned to multiple reporting units, the goodwill is distributed to the respective reporting units as part of the purchase price allocation process.

Goodwill and purchased intangible assets with indefinite useful lives are not amortized but are reviewed for impairment annually during the fourth quarter of each fiscal year and whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. The process of evaluating the potential impairment of goodwill and intangible assets requires significant judgment. The Company regularly monitors current business conditions and other factors including, but not limited to, adverse industry or economic trends, restructuring actions and lower projections of profitability that may impact future operating results.

Effective January 1, 2019, the Company reassigned goodwill to certain reporting units within the Light & Motion reportable segment resulting from a reorganization of the composition of goodwill reporting units. The goodwill was reassigned to the reporting units affected using the relative fair value approach. The Company also concluded that the fair value of each reporting unit exceeded its respective carrying value.

The changes in the carrying amount of goodwill and accumulated impairment loss during the three months ended March 31, 2020 and year ended December 31, 2019 were as follows:

	Three Months Ended March 31, 2020									Twelve Months Ended December 31, 2019
	Gross Carrying Amount			Accumulated Impairment Loss			Net			Gross Carrying Amount			Accumulated Impairment Loss			Net
Beginning balance at January 1	$	1,202.8		$	(144.3	)	$	1,058.5		$	731.3		$	(144.3	)	$	587.0
Acquired goodwill		—			—			—			474.0			—			474.0
Foreign currency translation		(2.1	)		—			(2.1	)		(2.5	)		—			(2.5	)
Ending balance at March 31, 2020 and December 31, 2019	$	1,200.7		$	(144.3	)	$	1,056.4		$	1,202.8		$	(144.3	)	$	1,058.5

Intangible Assets

Components of the Company’s intangible assets are comprised of the following:

As of March 31, 2020:	Gross		Accumulated Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology	$	446.4	$	(0.1	)	$	(188.6	)	$	(0.4	)	$	257.3
Customer relationships		308.2		(1.4	)	$	(89.1	)	$	(1.8	)	$	215.9
Patents, trademarks, trade names and other		120.9		—		$	(46.6	)	$	0.2		$	74.5
	$	875.5	$	(1.5	)	$	(324.3	)	$	(2.0	)	$	547.7

As of December 31, 2019:	Gross		Accumulated Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology⁽¹⁾	$	446.4	$	(0.1	)	$	(178.3	)	$	(0.2	)	$	267.8
Customer relationships⁽¹⁾		308.2		(1.4	)		(84.2	)		(1.4	)		221.2
Patents, trademarks, trade names and other⁽²⁾		120.9		—			(45.5	)		0.2			75.6
	$	875.5	$	(1.5	)	$	(308.0	)	$	(1.4	)	$	564.6

⁽¹⁾

^{During 2019, the Company recorded $316.2 of separately identified intangible assets related to the ESI Merger, of which $274.0 was completed technology, $25.4 was customer relationships and $16.8 was trademarks, trade names and backlog.}

⁽²⁾

^{During 2019, the Company reclassified $6.4 of gross favorable lease assets and $3.4 of related accumulated amortization from patents, trademarks, trade names and other to the right-of-use asset line in the balance sheet.}

Aggregate amortization expense related to acquired intangibles for the three months ended March 31, 2020 and 2019 was $16.3 and $15.7, respectively. Aggregate net amortization expense related to acquired intangible assets for future years is as follows:

Year	Amount
2020 (remaining)	$	41.0
2021	$	46.1
2022	$	45.2
2023	$	44.9
2024	$	44.0
2025	$	43.6
Thereafter	$	227.0

The Company excluded $55.9 of indefinite-lived trademarks and trade names that were not subject to amortization from the table above.

Debt

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Debt

11)

Debt

Senior Secured Term Loan Credit Facility

In connection with the completion of the acquisition of Newport Corporation (“Newport”) in 2016 (the “Newport Merger”), the Company entered into a term loan credit agreement (the “Term Loan Credit Agreement”) with Barclays Bank PLC, as administrative agent and collateral agent, and the lenders from time to time party thereto (the “Lenders”), that provided a senior secured term loan credit facility in the original principal amount of $780.0 (the “2016 Term Loan Facility”), subject to increase at the Company’s option and subject to receipt of lender commitments in accordance with the Term Loan Credit Agreement (the 2016 Term Loan Facility, together with the 2019 Incremental Term Loan Facility and 2019 Term Loan Refinancing Facility (each as defined below), the “Term Loan Facility”). Prior to the effectiveness of Amendment No. 6 (as defined below), the 2016 Term Loan Facility had a maturity date of April 29, 2023. As of March 31, 2020, borrowings under the Term Loan Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, (3) a London Interbank Offer Rate (“LIBOR”) rate determined by reference to the costs of funds for U.S.

dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, and (4) a floor of 1.75%, plus, in each case, an applicable margin; or (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, subject to a LIBOR rate floor of 0.0%, plus an applicable margin. The Company has elected the interest rate as described in clause (b) of the foregoing sentence. The Term Loan Credit Agreement provides that, unless an alternate rate of interest is agreed, all loans will be determined by reference to the base rate if the LIBOR rate cannot be ascertained, if regulators impose material restrictions on the authority of a lender to make LIBOR rate loans, or for other reasons. The 2016 Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

The Company subsequently entered into four separate repricing amendments to the 2016 Term Loan Facility, which decreased the applicable margin for LIBOR borrowings from 4.0% to 1.75%, with a LIBOR rate floor of 0.75%. As a consequence of the pricing of the 2019 Incremental Term Loan Facility (defined below), the applicable margin for the 2016 Term Loan Facility was increased to 2.00% (from 1.75%) with respect to LIBOR borrowings and 1.00% (from 0.75%) with respect to base rate borrowings.

On September 30, 2016, the Company entered into an interest rate swap agreement, which has a maturity date of September 30, 2020, to fix the rate on $335.0 of the then-outstanding balance of the 2016 Term Loan Facility. The rate was fixed at 1.198% per annum plus the applicable credit spread, which was 1.75% at March 31, 2020. At March 31, 2020, the notional amount of this transaction was $250.0 and it had a fair value liability of $0.5.

The Company incurred $28.7 of deferred finance fees, original issue discount and repricing fees related to the term loans under the 2016 Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method.

On February 1, 2019, in connection with the completion of the ESI Merger, the Company entered into an amendment (“Amendment No. 5”) to the Term Loan Credit Agreement. Amendment No. 5 provided an additional tranche B-5 term loan commitment in the original principal amount of $650.0 (the “2019 Incremental Term Loan Facility”), all of which was drawn down in connection with the closing of the ESI Merger. Pursuant to Amendment No. 5, the Company also effectuated certain amendments to the Term Loan Credit Agreement which make certain of the negative covenants and other provisions less restrictive. Prior to the effectiveness of Amendment No. 6 (as defined below), the 2019 Incremental Term Loan Facility had a maturity date of February 1, 2026 and bore interest at a rate per annum equal to, at the Company’s option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 1.25% with respect to base rate borrowings and 2.25% with respect to LIBOR borrowings. The 2019 Incremental Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.

On April 3, 2019, the Company entered into an interest rate swap agreement, which has a maturity date of March 31, 2023, to fix the rate on $300.0 of the then-outstanding balance of the 2019 Incremental Term Loan Facility. The rate was fixed at 2.309% per annum plus the applicable credit spread, which was 1.75% at March 31, 2020. At March 31, 2020, the notional amount of this transaction was $300.0 and it had a fair value liability of $15.3.

The Company incurred $11.4 of deferred finance fees and original issue discount fees related to the term loans under the 2019 Incremental Term Loan Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method.

On September 27, 2019, the Company entered into an amendment (“Amendment No. 6”) to the Term Loan Credit Agreement. Amendment No. 6 refinanced all existing loans outstanding under the 2016 Term Loan Facility and 2019 Incremental Term Loan Facility (“Existing Term Loans”) for a tranche B-6 term loan commitment in the original principal amount of $896.8 (“2019 Term Loan Refinancing Facility”). Each lender of the Existing Term Loans that elected to participate in the 2019 Term Loan Refinancing Facility was deemed to have exchanged the aggregate outstanding principal amount of its Existing Term Loans for an equal aggregate principal amount of tranche B-6 term loans under the 2019 Term Loan Refinancing Facility. On the effective date of Amendment No. 6 and immediately prior to the exchanges described above, the Company made a voluntary prepayment of $50.0, which was applied to the Existing Term Loans on a pro rata basis.

The Company incurred $2.2 of original issue discount fees related to the term loans under the 2019 Term Loan Refinancing Facility, which are included in long-term debt in the accompanying consolidated balance sheets and are being amortized to interest expense over the estimated life of the term loans using the effective interest method.

As of March 31, 2020, the remaining balance of deferred finance fees and original issue discount of the Term Loan Facility was $10.7. A portion of the deferred finance fees and original issue discount have been accelerated in connection with the various debt prepayments and extinguishments during 2016, 2017, 2018, 2019 and 2020.

The 2019 Term Loan Refinancing Facility matures on February 2, 2026, and bears interest at a rate per annum equal to, at the Company’s option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 0.75% with respect to base rate borrowings and 1.75% with respect to LIBOR borrowings. The 2019 Term Loan Refinancing Facility was issued with original issue discount of 0.25% of the principal amount thereof.

The Company is required to make scheduled quarterly payments each equal to 0.25% of the original principal amount of the 2019 Term Loan Refinancing Facility with the balance due on February 2, 2026.

As of March 31, 2020, after total principal prepayments of $575.0 (which includes a $50.0 prepayment made during the three months ended March 31, 2020) and regularly scheduled principal payments of $14.9, the total outstanding principal balance of the Term Loan Facility was $840.1 and the interest rate was 3.35%.

Under the Term Loan Credit Agreement, the Company is required to prepay outstanding term loans, subject to certain exceptions, with portions of its annual excess cash flow as well as with the net cash proceeds of certain of its asset sales, certain casualty and condemnation events and the incurrence or issuance of certain debt.

All obligations under the Term Loan Facility are guaranteed by certain of the Company’s domestic subsidiaries and are collateralized by substantially all of the Company’s assets and the assets of such subsidiaries, subject to certain exceptions and exclusions.

The Term Loan Credit Agreement contains customary representations and warranties, affirmative and negative covenants and provisions relating to events of default. If an event of default occurs, the lenders under the Term Loan Facility will be entitled to take various actions, including the acceleration of amounts due under the Term Loan Facility and all actions generally permitted to be taken by a secured creditor. At March 31, 2020, the Company was in compliance with all covenants under the Term Loan Credit Agreement.

Senior Secured Asset-Based Revolving Credit Facility

On February 1, 2019, in connection with the completion of the ESI Merger, the Company entered into an asset-based revolving credit agreement with Barclays Bank PLC, as administrative agent and collateral agent, the other borrowers from time to time party thereto, and the lenders and letters of credit issuers from time to time party thereto (the “ABL Credit Agreement”), that provides a senior secured asset-based revolving credit facility of up to $100.0, subject to a borrowing base limitation (the “ABL Facility”). On April 26, 2019, the Company entered into a First Amendment to the ABL Credit Agreement which amended the borrowing base calculation for eligible inventory prior to an initial field examination and appraisal requirements. The borrowing base for the ABL Facility at any time equals the sum of: (a) 85% of certain eligible accounts; plus (b) prior to certain notice and field examination and appraisal requirements, the lesser of (i) 20% of net book value of eligible inventory in the United States and (ii) 30% of the borrowing base, and after the satisfaction of such requirements, the lesser of (i) the lesser of (A) 65% of the lower of cost or market value of certain eligible inventory and (B) 85% of the net orderly liquidation value of certain eligible inventory and (ii) 30% of the borrowing base; minus (c) reserves established by the administrative agent, in each case, subject to additional limitations and examination requirements for eligible accounts and eligible inventory acquired in an acquisition after February 1, 2019. The ABL Facility includes borrowing capacity in the form of letters of credit up to $25.0.

Borrowings under the ABL Facility bear interest at a rate per annum equal to, at the Company’s option, any of the following, plus, in each case, an applicable margin: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00% and (4) a floor of 0.00%; and (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, with a floor of 0.00%. The initial applicable margin for borrowings under the ABL Facility is 0.50% with respect to base rate borrowings and 1.50% with respect to LIBOR borrowings. Commencing with the completion of the first fiscal quarter ending after the closing of the ABL Facility, the applicable margin for borrowings thereunder is subject to upward or downward adjustment each fiscal quarter, based on the average historical excess availability during the preceding quarter.

In addition to paying interest on any outstanding principal under the ABL Facility, the Company is required to pay a commitment fee in respect of the unutilized commitments thereunder equal to 0.25% per annum. The Company must also pay customary letter of credit fees and agency fees.

If at any time the aggregate amount of outstanding loans, protective advances, unreimbursed letter of credit drawings and undrawn letters of credit under the ABL Facility exceeds the lesser of (a) the commitment amount and (b) the borrowing base, the Company is required to repay outstanding loans and/or cash collateralize letters of credit, with no reduction of the commitment amount. During any period that the amount available under the ABL Facility is less than the greater of (i) $8.5 and (ii) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base for three consecutive business days, until the time when excess availability has been at least the greater of (i) $8.5 and (ii) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base, in each case, for 30 consecutive calendar days (a “Cash Dominion Period”), or during the continuance of an event of default, the Company is required to repay outstanding loans and/or cash collateralize letters of credit with the cash that it is required to deposit daily in a collection account maintained with the administrative agent under the ABL Facility. During a Cash Dominion Period, the Company may make borrowings under the ABL Facility subject to the satisfaction of customary funding conditions.

There is no scheduled amortization under the ABL Facility. The principal amount outstanding under the ABL Facility is due and payable in full on the fifth anniversary of the closing date.

All obligations under the ABL Facility are guaranteed by certain of the Company’s domestic subsidiaries and are collateralized by substantially all of the Company’s assets and the assets of such subsidiaries, subject to certain exceptions and exclusions.

From the time when the Company has excess availability less than the greater of (a) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base and (b) $8.5 until the time when the Company has excess availability equal to or greater than the greater of (a) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base and (b) $8.5 for 30 consecutive days, or during the continuance of an event of default, the ABL Credit Agreement requires the Company to maintain a Fixed Charge Coverage Ratio (as defined in the ABL Credit Agreement) tested on the last day of each fiscal quarter of at least 1.0 to 1.0.

The ABL Credit Agreement also contains customary representations and warranties, affirmative covenants and provisions relating to events of default. If an event of default occurs, the lenders under the ABL Facility will be entitled to take various actions, including the acceleration of amounts due under the ABL Facility and all actions permitted to be taken by a secured creditor. The Company has not borrowed against the ABL Facility to date.

Lines of Credit and Short-Term Borrowing Arrangements

The Company’s Japanese subsidiaries have lines of credit and a financing facility with various financial institutions, many of which generally expire and are renewed at three-month intervals with the remaining having no expiration date. The lines of credit and financing facility provided for aggregate borrowings as of March 31, 2020 of up to an equivalent of $32.9 U.S. dollars. Total borrowings outstanding under these arrangements were $5.3 and $3.1 at March 31, 2020 and December 31, 2019.

	March 31, 2020		December 31, 2019
Short-term debt:
Japanese lines of credit	$	4.1	$	2.5
Japanese receivables financing facility		1.2		0.6
Term Loan Facility		9.0		9.0
	$	14.3	$	12.1

	March 31, 2020		December 31, 2019
Long-term debt:
Term Loan Facility, net⁽¹⁾	$	820.4	$	871.6
Other debt		—		0.1
	$	820.4	$	871.7

⁽¹⁾

Net of deferred financing fees, original issue discount and repricing fees of $10.7 and $11.8 as of March 31, 2020 and December 31, 2019, respectively.

The Company recognized interest expense of $8.9 and $9.1 for the three months ended March 31, 2020 and 2019, respectively.

Contractual maturities of the Company’s debt obligations as of March 31, 2020 are as follows:

Year	Amount
2020 (remaining)	$	12.0
2021		9.0
2022		9.0
2023		9.0
2024		9.0
2025		9.0
Thereafter	$	788.4

Product Warranties

3 Months Ended

Mar. 31, 2020

Guarantees And Product Warranties [Abstract]

Product Warranties

12)	Product Warranties

The Company provides for the estimated costs to fulfill customer warranty obligations upon the recognition of the related revenue. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by shipment volume, product failure rates, utilization levels, material usage and supplier warranties on parts delivered to the Company. Should actual product failure rates, utilization levels, material usage, or supplier warranties on parts differ from the Company’s estimates, revisions to the estimated warranty liability would be required.

Product warranty activities were as follows:

	Three Months Ended March 31,
	2020			2019
Beginning of period	$	14.9		$	10.4
Assumed product warranty liability from ESI Merger		—			7.2
Provision for product warranties		6.7			6.0
Direct and other charges to warranty liability		(6.3	)		(6.7	)
End of period⁽¹⁾	$	15.3		$	16.9

⁽¹⁾

As of March 31, 2020, short-term product warranty of $12.2 and long-term product warranty of $3.1 were included within other current liabilities and other non-current liabilities, respectively, within the accompanying condensed consolidated balance sheet. As of March 31, 2019, short-term product warranty of $13.8 and long-term product warranty of $3.1 were included within other current liabilities and other non-current liabilities, respectively, within the accompanying condensed consolidated balance sheet.

Income Taxes

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

13)	Income Taxes

The Company’s effective tax rates for the three months ended March 31, 2020 and 2019 were 15.0 % and 18.8%, respectively. The effective tax rates for the three months ended March 31, 2020 and 2019 were lower than the U.S. statutory tax rate due to the U.S. deduction for foreign derived intangible income, the federal tax credit for research activities and the geographic mix of income earned by the Company’s international subsidiaries being taxed at rates lower than the U.S. statutory tax rate, offset by the U.S. global intangible low-taxed income inclusion, the $1 million limitation on the deduction of executive compensation and state income taxes.

On March 27, 2020, the United States enacted the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act which contains numerous income tax provisions among other tax and non-tax provisions. Some of these income tax provisions have retroactive effect on years before the date of enactment. The Company has evaluated the CARES Act legislation in relation to income taxes and does not expect the CARES Act income tax provisions to have a material impact on its financial position, results of operations and cash flows.

As of March 31, 2020 and December 31, 2019 the total amount of gross unrecognized tax benefits, which excludes interest and penalties, was approximately $44.1 and $43.5, respectively. As of March 31, 2020, if these benefits were recognized in a future period, the timing of which is not estimable, the net unrecognized tax benefit of $36.1, excluding interest and penalties, would impact the Company’s effective tax rate. The Company accrues interest expense, and if applicable, penalties, for any uncertain tax positions. Interest and penalties are classified as a component of income tax expense. As of March 31, 2020 and December 31, 2019, the Company had accrued interest on unrecognized tax benefits of approximately $0.6 and $0.5, respectively.

Over the next 12 months it is reasonably possible that the Company may recognize approximately $0.7 of previously net unrecognized tax benefits, excluding interest and penalties, related to various U.S. state and foreign tax positions primarily as a result of the expiration of certain statutes of limitations.

The Company and its subsidiaries are subject to examination by U.S. federal, state and foreign tax authorities. The U.S. statute of limitations remains open for tax years 2016 through the present. The statute of limitations for the Company’s tax filings in other jurisdictions varies between fiscal years 2014 through present. The Company has certain federal credit carry-forwards and state tax loss and credit carry-forwards that are open to examination for tax years 2000 through the present.

Net Income Per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Net Income Per Share

14)	Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share:

	Three Months Ended March 31,
	2020		2019
Numerator:
Net income	$	69.1	$	12.5
Denominator:
Shares used in net income per common share – basic		54,918,000		54,147,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan		318,000		701,000
Shares used in net income per common share – diluted		55,236,000		54,848,000
Net income per common share:
Basic	$	1.26	$	0.23
Diluted	$	1.25	$	0.23

Basic earnings per share (“EPS”) is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the treasury stock method) if securities containing potentially dilutive common shares (restricted stock units (“RSUs”) and stock appreciation rights (“SARs”)) had been converted to such common shares, and if such assumed conversion is dilutive.

For the three months ended March 31, 2020 and 2019, there were approximately 36,100 and 128,200 weighted-average restricted stock units, respectively, that would have had an anti-dilutive effect on EPS, and were excluded from the computation of diluted weighted-average shares.

Stock-Based Compensation

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

15)	Stock-Based Compensation

The Company grants RSUs to employees and directors under the 2014 Stock Incentive Plan (the “2014 Plan”). The 2014 Plan is administered by the Compensation Committee of the Company’s Board of Directors. The 2014 Plan is intended to attract and retain employees and directors, and to provide an incentive for these individuals to assist the Company to achieve long-range performance goals and to enable these individuals to participate in the long-term growth of the Company.

In connection with the completion of the ESI Merger, the Company assumed:

•

all RSUs that vest based solely on the satisfaction of service conditions, granted under any ESI equity plan, arrangement or agreement (“ESI Plan”) that were outstanding immediately prior to the effective time of the ESI Merger, and as to which shares of ESI common stock were not fully distributed in connection with the closing of the ESI Merger,

•

all RSUs that were granted subject to vesting based on both the achievement of performance goals and the satisfaction of service conditions granted under any ESI Plan that were outstanding immediately prior to the effective time of the ESI Merger, and

•

all SARs granted under any ESI Plan, whether vested or unvested, that were outstanding immediately prior to the effective time of the ESI Merger and held by an individual who was a service provider of ESI as of the date on which the effective time of the ESI Merger occurred.

As of the effective time of the ESI Merger, based on a formula in the ESI Merger Agreement, (a) such RSUs were converted automatically into RSUs with respect to 736,000 shares of the Company’s common stock (the “Assumed RSUs”), and (b) such SARs were converted automatically into SARs with respect to 13,000 shares of the Company’s common stock (the “Assumed SARs”).

Included in the total number of Assumed RSUs are 326,000 shares of the Company’s common stock for employees and outside directors that are part of the ESI Deferred Compensation plan (the “ESI DC Plan”). These shares will not become issued shares until their respective release dates.

The shares of the Company’s common stock that are subject to the Assumed SARs and the Assumed RSUs are issuable pursuant to the Company’s 2014 Plan.

The 749,000 shares of the Company’s common stock that are issuable pursuant to the Assumed RSUs and the Assumed SARs under the Company’s 2014 Plan were registered under the Securities Act of 1933 on the Registration Statement on Form S-8. These shares are in addition to the 18,000,000 shares of the Company’s common stock reserved for issuance under the 2014 Plan and previously registered under the Securities Act of 1933 on the Registration Statement on Form S-8.

During the three months ended March 31, 2020, the Company granted 88,000 RSUs with a weighted average grant date fair value of $112.24. During the three months ended March 31, 2019, the Company granted 182,000 RSUs with a weighted average grant date fair value of $82.58. There were no SARs granted during the three months ended March 31, 2020 or 2019.

The total stock-based compensation expense included in the Company’s consolidated statements of income and comprehensive income was as follows:

	Three Months Ended March 31,
	2020		2019
Cost of revenues	$	1.0	$	0.4
Research and development		1.1		0.8
Selling, general and administrative		5.9		8.0
Acquisition and integration cost		0.5		18.6
Total pre-tax stock-based compensation expense	$	8.5	$	27.8

At March 31, 2020, the total compensation expense related to unvested stock-based awards granted to employees and directors under the 2014 Plan that had not been recognized was $27.9, net of estimated forfeitures. The future compensation expense for time-based awards is recognized on a straight-line basis and the future compensation expense for performance-based awards is recognized using the accelerated graded vesting method, both of which expense over the requisite service period, net of estimated forfeitures, except for retirement eligible employees, in which case the Company expenses the fair value of the grant in the period the grant is issued. The Company considers many factors when estimating expected forfeitures, including types of awards and historical experience. Actual results and future changes in estimates may differ substantially from the Company’s current estimates.

The following table presents the activity for RSUs under the Plan:

	Three Months Ended March 31, 2020
	Outstanding RSUs			Weighted Average Grant Date Fair Value
RSUs – beginning of period		1,102,534		$	85.93
Accrued dividend shares		254		$	100.84
Granted		88,368		$	112.24
Vested		(446,503	)	$	84.06
Forfeited		(41,642	)	$	83.76
RSUs – end of period		703,011		$	90.56

The following table presents the activity for SARs under the Plan:

	Three Months Ended March 31, 2020
	Outstanding SARs			Weighted Average Grant Date Fair Value
SARs – beginning of period		108,854		$	29.05
Exercised		(16,216	)	$	23.87
Forfeited or expired		—		$	—
SARs Outstanding – end of period		92,638		$	30.0

Stockholders' Equity

3 Months Ended

Mar. 31, 2020

Federal Home Loan Banks [Abstract]

Stockholders' Equity

16)	Stockholders’ Equity

Share Repurchase Program

On July 25, 2011, the Company’s Board of Directors approved a share repurchase program for the repurchase of up to an aggregate of $200 of its outstanding common stock from time to time in open market purchases, privately negotiated transactions or through other appropriate means. The timing and quantity of any shares repurchased will depend upon a variety of factors, including business conditions, stock market conditions and business development activities, including, but not limited to, merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice. The Company has repurchased approximately 2,588,000 shares of common stock for approximately $127 pursuant to the program since its adoption. During the three months ended March 31, 2020 and 2019, there were no repurchases of common stock.

Cash Dividends

Holders of the Company’s common stock are entitled to receive dividends when they are declared by the Company’s Board of Directors. In addition, the Company accrues dividend equivalents on the RSUs the Company assumed in the ESI Merger described in Note 15 above when dividends are declared by the Company’s Board of Directors. During the three months ended March 31, 2020, the Company’s Board of Directors declared a quarterly cash dividend of $0.20 per share, which totaled $11.0. During the three months ended March 31, 2019, the Company’s Board of Directors declared a quarterly cash dividend of $0.20 per share, which totaled $10.8.

Future dividend declarations, if any, as well as the record and payment dates for such dividends, are subject to the final determination of the Company’s Board of Directors. In addition, under the Term Loan Facility and ABL Facility, the Company may be restricted from paying dividends under certain circumstances.

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information

17)	Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information

The Company is a global provider of instruments, systems, subsystems and process control solutions that measure, monitor, deliver, analyze, power and control critical parameters of advanced manufacturing processes to improve process performance and productivity for its customers. The Company’s products are derived from its core competencies in pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, electronic control technology, reactive gas generation and delivery, power generation and delivery, vacuum technology, lasers, photonics, optics, precision motion control, vibration control and laser-based manufacturing systems solutions. The Company also provides services relating to the maintenance and repair of its products, installation services and training. The Company’s primary served markets include semiconductor, industrial technologies, life and health sciences, research and defense.

The Company’s Chief Operating Decision Maker (“CODM”) utilizes financial information to make decisions about allocating resources and assessing performance for the entire Company, which is used in the decision making process to assess performance. Effective February 1, 2019, in conjunction with its acquisition of ESI, the Company created a third reportable segment known as the Equipment & Solutions segment in addition to its two then-existing reportable segments: the Vacuum & Analysis segment and the Light & Motion segment.

The Vacuum & Analysis segment provides a broad range of instruments, components and subsystems which are derived from the Company’s core competencies in pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, electronic control technology, reactive gas generation and delivery, power generation and delivery and vacuum technology.

The Light & Motion segment provides a broad range of instruments, components and subsystems which are derived from the Company’s core competencies in lasers, photonics, optics, precision motion control and vibration control.

The Equipment & Solutions segment provides laser-based manufacturing systems solutions for the micro-machining industry that enable customers to optimize production. The Equipment & Solutions segment’s primary served markets include flexible and rigid PCB processing/fabrication, semiconductor wafer processing, and passive component manufacturing and testing. The Equipment & Solutions segment’s systems incorporate specialized laser technology and proprietary control software to efficiently process the materials and components that are an integral part of electronic devices and systems.

The Company derives its segment results directly from the manner in which results are reported in its management reporting system. The accounting policies that the Company uses to derive reportable segment results are substantially the same as those used for external reporting purposes. The Company does not disclose external or intersegment revenues separately by reportable segment as this information is not presented to the CODM for decision making purposes.

The following table sets forth net revenues by reportable segment:

	Three Months Ended March 31,
	2020		2019
Vacuum & Analysis	$	319.3	$	234.4
Light & Motion		165.4		194.0
Equipment & Solutions		51.0		35.2
	$	535.7	$	463.6

The following table sets forth a reconciliation of segment gross profit to consolidated net income:

	Three Months Ended March 31,
	2020		2019
Gross profit by reportable segment:
Vacuum & Analysis	$	140.8	$	98.1
Light & Motion		75.6		92.9
Equipment & Solutions		23.2		7.1
Total gross profit by reportable segment		239.6		198.1
Operating expenses:
Research and development		42.4		38.9
Selling, general and administrative		87.2		82.5
Acquisition and integration costs		2.2		30.2
Restructuring and other		0.4		1.9
Fees and expenses related to repricing of Term Loan Facility		—		5.8
Amortization of intangible assets		16.3		15.7
Asset impairments		1.2		—
Income from operations		89.9		23.1
Interest income		0.7		1.7
Interest expense		8.9		9.1
Other expense, net		0.4		0.3
Income before income taxes		81.3		15.4
Provision for income taxes		12.2		2.9
Net income	$	69.1	$	12.5

The following table sets forth capital expenditures by reportable segment for the three months ended March 31, 2020 and 2019:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2020:
Capital expenditures	$	4.1	$	4.0	$	1.9	$	10.0
Three Months Ended March 31, 2019:
Capital expenditures	$	7.5	$	5.1	$	1.9	$	14.5

The following table sets forth depreciation and amortization by reportable segment for the three months ended March 31, 2020 and 2019:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2020:
Depreciation and amortization	$	4.9	$	13.4	$	10.1	$	28.4
Three Months Ended March 31, 2019
Depreciation and amortization	$	4.1	$	14.1	$	7.0	$	25.2

Total income tax expense is not presented by reportable segment because the necessary information is not available or used by the CODM.

The following table sets forth segment assets by reportable segment:

March 31, 2020:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	196.1	$	158.6	$	57.7	$	(31.4	)	$	381.0
Inventory, net		227.2		174.5		72.4		0.1			474.2
Total segment assets	$	423.3	$	333.1	$	130.1	$	(31.3	)	$	855.2

December 31, 2019:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	185.9	$	147.2	$	40.1	$	(32.1	)	$	341.1
Inventory, net		224.8		163.7		73.5		0.1			462.1
Total segment assets	$	410.7	$	310.9	$	113.6	$	(32.0	)	$	803.2

The following is a reconciliation of segment assets to consolidated total assets:

	March 31, 2020		December 31, 2019
Total segment assets	$	855.2	$	803.2
Cash and cash equivalents and short-term investments		503.4		524.0
Other current assets		98.0		106.3
Property, plant and equipment, net		238.2		241.9
Right-of-use asset		127.1		64.5
Goodwill and intangible assets, net		1,604.1		1,623.1
Other assets		48.9		53.3
Consolidated total assets	$	3,474.9	$	3,416.3

Geographic

Information about the Company’s operations in different geographic regions is presented in the tables below. Net revenues to unaffiliated customers are based on the location in which the sale originated. Transfers between geographic areas are at tax transfer prices and have been eliminated from consolidated net revenues.

	Three Months Ended March 31,
	2020		2019
Net revenues:
United States	$	231.5	$	224.4
South Korea		76.0		35.8
China		49.7		37.8
Japan		39.9		42.1
Germany		34.5		38.1
Other		104.1		85.4
	$	535.7	$	463.6

Long-lived assets:⁽¹⁾	March 31, 2020		December 31, 2019
United States	$	273.3	$	208.3
Europe		37.7		41.4
Asia		84.2		89.6
	$	395.2	$	339.3

⁽¹⁾

Long-lived assets include property, plant and equipment, net, right-of-use assets, and certain other assets, and exclude goodwill, intangible assets and long-term tax-related accounts.

Goodwill associated with each of the Company’s reportable segments is as follows:

	March 31, 2020		December 31, 2019
Reportable segment:
Vacuum & Analysis	$	196.1	$	196.7
Light & Motion		387.4		388.5
Equipment & Solutions		472.9		473.3
Total goodwill	$	1,056.4	$	1,058.5

Worldwide Product Information

The Company groups its product offerings into three groups based upon the similarity of product function as follows:

	Three Months Ended March 31,
	2020		2019
Advanced Manufacturing Components	$	425.9	$	371.4
Global Service		74.5		66.2
Advanced Manufacturing Systems		35.3		26.0
	$	535.7	$	463.6

Advanced manufacturing components are comprised of product revenues from the Company’s Vacuum & Analysis and Light & Motion segments. Global service is comprised of total service revenues for all three of the Company’s reportable segments. Advanced manufacturing systems is comprised of product revenues for the Company’s Equipment & Solutions segment.

Major Customers

For the three months ended March 31, 2020, the Company had two customers that each accounted for 10% or more of the Company’s total net revenues. Net revenues from Applied Materials, Inc. and LAM Research Corporation constituted 11% and 10% of the Company’s total net revenues for the period, respectively. For the three months ended March 31, 2019, no single customer accounted for 10% or more of the Company’s total net revenues.

Restructuring and Other

3 Months Ended

Mar. 31, 2020

Expense Of Restructuring Activities And Other [Abstract]

Restructuring and Other

18)	Restructuring and Other

Restructuring

The Company recorded restructuring charges of $0.9 during the three months ended March 31, 2020, primarily related to duplicate facility costs.

The Company recorded restructuring charges of $0.2 during the three months ended March 31, 2019, primarily related to severance costs related to the consolidation of certain functions in Asia.

Restructuring activities were as follows:

	Three Months Ended March 31,
	2020			2019
Beginning of period	$	3.7		$	2.6
Charged to expense		0.9			0.2
Payments and adjustments		(1.7	)		(0.2	)
End of period	$	2.9		$	2.6

Other

The Company received an insurance reimbursement of $0.5 during the three months ended March 31, 2020 for costs recorded on a legal settlement from a contractual obligation assumed as part of the acquisition of Newport. The Company recorded a charge of $1.7 during the three months ended March 31, 2019 related to a legal settlement from a contractual obligation we assumed as part of our acquisition of Newport.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

19)	Commitments and Contingencies

In 2016, two putative class actions lawsuit captioned Dixon Chung v. Newport Corp., et al., Case No. A-16-733154-C, and Hubert C. Pincon v. Newport Corp., et al., Case No. A-16-734039-B, were filed in the District Court, Clark County, Nevada on behalf of a putative class of stockholders of Newport for claims related to the merger agreement (“Newport Merger Agreement”) between the Company, Newport, and a wholly-owned subsidiary of the Company (“Merger Sub”). The lawsuits named as defendants the Company, Newport, Merger Sub, and certain then current and former members of Newport’s board of directors. Both complaints alleged that Newport directors breached their fiduciary duties to Newport’s stockholders by agreeing to sell Newport through an inadequate and unfair process, which led to inadequate and unfair consideration, by agreeing to unfair deal protection devices and by omitting material information from the proxy statement. The complaints also alleged that the Company, Newport and Merger Sub aided and abetted the directors’ alleged breaches of their fiduciary duties. The Court consolidated the actions, and plaintiffs later filed an amended complaint captioned In re Newport Corporation Shareholder Litigation, Case No. A-16-733154-B, in the District Court, Clark County, Nevada, on behalf of a putative class of Newport’s stockholders for claims related to the Newport Merger Agreement. The amended complaint alleged Newport’s former board of directors breached their fiduciary duties to Newport’s stockholders and that the Company, Newport and Merger Sub had aided and abetted these breaches and sought monetary damages, including pre- and post-judgment interest. In June 2017, the Court granted defendants’ motion to dismiss and dismissed the amended complaint against all defendants but granted plaintiffs leave to amend.

On July 27, 2017, plaintiffs filed a second amended complaint containing substantially similar allegations but naming only Newport’s former directors as defendants. On August 8, 2017, the Court dismissed the Company and Newport from the action. The second amended complaint seeks monetary damages, including pre- and post-judgment interest. The Court granted a motion for class certification on September 27, 2018, appointing Mr. Pincon and Locals 302 and 612 of the International Union of Operating Engineers - Employers Construction Industry Retirement Trust as class representatives. On June 11, 2018, plaintiff Dixon Chung was voluntarily dismissed from the litigation. On August 9, 2019, plaintiffs filed a motion for leave to file a third amended complaint, which was denied on October 10, 2019. On August 23, 2019, defendants filed a motion for summary judgment. On January 23, 2020, the court entered its findings of fact, conclusions of law, and order granting defendants’ motion for summary judgment. On February 18, 2020, plaintiffs filed a notice of appeal from the court’s order granting defendants’ motion for summary judgment, as well as from the court’s prior orders granting defendants’ motion for a bench trial and denying plaintiffs’ motion for leave to file an amended complaint. On March 20, 2020, plaintiffs filed a motion to retax and settle costs, and defendants filed a motion for attorneys’ fees. A hearing on both motions is scheduled for August 4, 2020.

The Company is subject to various legal proceedings and claims, which have arisen in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on our results of operations, financial condition or cash flows.

Recently Issued or Adopted Accounting Pronouncements (Policies)

3 Months Ended

Mar. 31, 2020

Accounting Changes And Error Corrections [Abstract]

Recently Issued or Adopted Accounting Pronouncements

Leases (Tables)

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Schedule of Elements of Lease Payments

The elements of lease expense were as follows:

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Lease Cost:
Operating lease cost⁽¹⁾	$	7.3	$	5.0
Short-term lease		1.2		1.3
Total lease cost	$	8.5	$	6.3

⁽¹⁾

Operating lease cost includes an immaterial amount of variable expenses and sublease rental income.

Future Lease Payment Under Non-Cancelable Lease

Future lease payments under non-cancelable leases as of March 31, 2020 are detailed as follows:

2020 (remaining)	$	3.7
2021		18.7
2022		13.3
2023		11.9
2024		11.3
Thereafter		107.4
Total lease payments		166.3
Less: imputed interest		36.5
Total operating lease liabilities	$	129.8

Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Schedule of Deferred Revenue and Customer Advances by Arrangement

A rollforward of the Company’s deferred revenue and customer advances is as follows:

	Three Months Ended			Three Months Ended
	March 31, 2020			March 31, 2019
Beginning balance, January 1⁽¹⁾	$	24.8		$	17.5
Deferred revenue and customer advances in ESI Merger		—			3.3
Additions to deferred revenue and customer advances		17.7			17.2
Amount of deferred revenue and customer advances recognized in income		(17.1	)		(13.9	)
Ending balance, March 31⁽²⁾	$	25.4		$	24.1

⁽¹⁾

Beginning deferred revenue and customer advances as of December 31, 2019 included $12.4 of current deferred revenue, $3.3 of long-term deferred revenue and $9.1 of current customer advances.

⁽²⁾

Ending deferred revenue and customer advances as of March 31, 2020 included $12.4 of current deferred revenue, $3.5 of long-term deferred revenue and $9.5 of current customer advances.

Summary of Revenue from Contracts with Customers

The following table summarizes revenue from contracts with customers:

	Three Months Ended March 31, 2020
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	276.2	$	149.7	$	35.3	$	461.2
Services		43.1		15.7		15.7		74.5
Total net revenues	$	319.3	$	165.4	$	51.0	$	535.7

	Three Months Ended March 31, 2019
	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Net revenues:
Products	$	192.7	$	178.7	$	26.0	$	397.4
Services		41.7		15.3		9.2		66.2
Total net revenues	$	234.4	$	194.0	$	35.2	$	463.6

Investments (Tables)

3 Months Ended

Mar. 31, 2020

Investments Debt And Equity Securities [Abstract]

Gross Unrealized Gains and (Losses) Aggregated by Investment Category

The following tables show the gross unrealized gains and (losses) aggregated by investment category for available-for-sale investments:

As of March 31, 2020:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	10.4	$	—	$	—		$	10.4
Bankers' acceptance drafts		2.4		—		—			2.4
Commercial paper		26.4		—		(0.2	)		26.2
U.S. treasury obligations		10.0		—		—			10.0
U.S. agency obligations		12.3		0.1		—			12.4
	$	61.5	$	0.1	$	(0.2	)	$	61.4

As of March 31, 2020:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5.4	$	0.6	$	—	$	6.0

As of December 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Available-for-sale investments:
Time deposits and certificates of deposit	$	13.1	$	—	$	—		$	13.1
Bankers' acceptance drafts		4.0		—		—			4.0
Commercial paper		61.5		—		(0.3	)		61.2
U.S. treasury obligations		5.0		—		—			5.0
U.S. agency obligations		26.1		—		—			26.1
	$	109.7	$	—	$	(0.3	)	$	109.4

As of December 31, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Estimated Fair Value
Long-term investments:
Available-for-sale investments:
Group insurance contracts	$	5.2	$	0.6	$	—	$	5.8

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis

Assets and liabilities of the Company are measured at fair value on a recurring basis as of March 31, 2020 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	March 31, 2020		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	16.9	$	16.9	$	—	$	—
Commercial paper		33.8		—		33.8		—
U.S. treasury obligations		1.2		—		1.2		—
U.S. agency obligations		58.4		—		58.4		—
Available-for-sale investments:
Time deposits and certificates of deposit		10.4		—		10.4		—
Bankers' acceptance drafts		2.4		—		2.4		—
Commercial paper		26.2		—		26.2		—
U.S. treasury obligations		10.0		—		10.0		—
U.S. agency obligations		12.4		—		12.4		—
Group insurance contracts		6.0		—		6.0		—
Derivatives – currency forward contracts		2.7		—		2.7		—
Funds in investments and other assets:
Israeli pension assets		16.3		—		16.3		—
Deferred compensation plan assets:
Mutual funds and exchange traded funds		1.2		—		1.2		—
Money market securities		0.1		—		0.1		—
Total assets	$	198.0	$	16.9	$	181.1	$	—
Liabilities:
Derivatives – currency forward contracts	$	0.5	$	—	$	0.5	$	—
Derivatives – interest rate hedge - current		0.5		—		0.5		—
Derivatives – interest rate hedge - non-current		15.2		—		15.2		—
Total liabilities	$	16.2	$	—	$	16.2	$	—
Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	110.3	$	16.9	$	93.4	$	—
Short-term investments		61.4		—		61.4		—
Other current assets		2.7		—		2.7		—
Total current assets	$	174.4	$	16.9	$	157.5	$	—
Long-term investments	$	6.0	$	—	$	6.0	$	—
Other assets		17.6		—		17.6		—
Total long-term assets	$	23.6	$	—	$	23.6	$	—
Liabilities:
Other current liabilities	$	1.0	$	—	$	1.0	$	—
Other liabilities	$	15.2	$	—	$	15.2	$	—

⁽¹⁾

The cash and cash equivalent amounts presented in the table above do not include cash of $331.7 as of March 31, 2020.

Assets and liabilities of the Company are measured at fair value on a recurring basis as of December 31, 2019 and are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	December 31, 2019		Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market funds	$	0.6	$	0.6	$	—	$	—
Time deposits and certificates of deposit		2.2		—		2.2		—
Commercial paper		42.6		—		42.6		—
U.S. treasury obligations		2.7		—		2.7		—
U.S. agency obligations		17.1		—		17.1		—
Available-for-sale securities:
Time deposits and certificates of deposit		13.1		—		13.1		—
Bankers' acceptance drafts		4.0		—		4.0		—
Commercial paper		61.2		—		61.2		—
U.S. treasury obligations		5.0		—		5.0		—
U.S. agency obligations		26.1		—		26.1		—
Group insurance contracts		5.8		—		5.8		—
Derivatives – currency forward contracts		1.1		—		1.1		—
Derivatives –interest rate hedge - current		0.8		—		0.8		—
Funds in investments and other assets:
Israeli pension assets		16.7		—		16.7		—
Deferred compensation plan assets:
Mutual funds and exchange traded funds		2.0		—		2.0		—
Money market funds		0.5		—		0.5		—
Total assets	$	201.5	$	0.6	$	200.9	$	—
Liabilities:
Derivatives – currency forward contracts	$	0.3	$	—	$	0.3	$	—
Derivatives – interest rate hedge - non-current		6.5		—		6.5		—
Total liabilities	$	6.8	$	—	$	6.8	$	—
Reported as follows:
Assets:
Cash and cash equivalents⁽¹⁾	$	65.2	$	0.6	$	64.6	$	—
Short-term investments		109.4		—		109.4		—
Other current assets		1.9		—		1.9		—
Total current assets	$	176.5	$	0.6	$	175.9	$	—
Long-term investments	$	5.8	$	—	$	5.8	$	—
Other assets		19.2		—		19.2		—
Total long-term assets	$	25.0	$	—	$	25.0	$	—
Liabilities:
Other current liabilities	$	0.3	$	—	$	0.3	$	—
Other liabilities	$	6.5	$	—	$	6.5	$	—

⁽¹⁾

The cash and cash equivalent amounts presented in the table above do not include cash of $349.4 as of December 31, 2019.

Derivatives (Tables)

3 Months Ended

Mar. 31, 2020

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summary of Primary Net Hedging Positions and Corresponding Fair Values

The following tables provide a summary of the primary net hedging positions and corresponding fair values held as of March 31, 2020 and December 31, 2019:

	March 31, 2020
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value
U.S. Dollar/Japanese Yen	$	34.4	$	(0.2	)
U.S. Dollar/South Korean Won		32.5		1.8
U.S. Dollar/Euro		10.1		0.4
U.S. Dollar/U.K. Pound Sterling		5.3		0.3
U.S. Dollar/Taiwan Dollar		22.1		(0.1	)
Total	$	104.4	$	2.2

	December 31, 2019
Currency Hedged (Buy/Sell)	Gross Notional Value		Fair Value
U.S. Dollar/Japanese Yen	$	45.9	$	0.1
U.S. Dollar/South Korean Won		51.7		0.2
U.S. Dollar/Euro		15.7		0.2
U.S. Dollar/U.K. Pound Sterling		8.3		(0.2	)
U.S. Dollar/Taiwan Dollar		33.1		(0.5	)
Total	$	154.7	$	(0.2	)

Summary of Fair Value Amounts of Company's Derivative Instruments

The following table provides a summary of the fair value amounts of the Company’s derivative instruments:

Derivatives Designated as Hedging Instruments	March 31, 2020			December 31, 2019
Derivative assets:
Foreign exchange contracts⁽¹⁾	$	2.7		$	1.1
Foreign currency interest rate hedge⁽²⁾		—			0.8
Derivative liabilities:
Foreign exchange contracts⁽¹⁾		(0.5	)		(1.3	)
Foreign currency interest rate hedge⁽²⁾		(15.8	)		(6.5	)
Total net derivative liability designated as hedging instruments	$	(13.6	)	$	(5.9	)

⁽¹⁾

⁽²⁾

Summary of Gains (Losses) on Derivatives Designated as Cash Flow Hedging Instruments

The following table provides a summary of the (losses) gains on derivatives designated as cash flow hedging instruments:

	Three Months Ended March 31,
Derivatives Designated as Cash Flow Hedging Instruments	2020			2019
Forward exchange contracts:
Net gain (loss) recognized in accumulated OCI⁽¹⁾	$	(6.0	)	$	0.1
Net gain (loss) reclassified from accumulated OCI into income⁽²⁾	$	0.7		$	0.9

⁽¹⁾

^{Net change in the fair value of the effective portion classified in accumulated OCI.}

⁽²⁾

Summary of Gain on Derivatives Not Designated as Hedging Instruments

The following table provides a summary of the gain on derivatives not designated as hedging instruments:

	Three Months Ended March 31,
Derivatives Not Designated as Hedging Instruments	2020		2019
Forward exchange contracts:
Net gain recognized in income⁽¹⁾	$	0.2	$	0.1

⁽¹⁾

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

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Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

Inventories (Tables)

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consist of the following:

	March 31, 2020		December 31, 2019
Raw materials	$	300.4	$	288.8
Work-in-process		81.0		79.3
Finished goods		92.8		94.0
	$	474.2	$	462.1

Acquisitions (Tables)

3 Months Ended

Mar. 31, 2020

Summary of Purchase Price

The purchase price of ESI consisted of the following:

Cash paid for outstanding shares⁽¹⁾	$	1,032.7
Settlement of share-based compensation awards⁽²⁾		30.6
Total purchase price		1,063.3
Less: Cash and cash equivalents acquired		(44.1	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019.2

⁽¹⁾

Represents cash paid of $30.00 per share for approximately 34,422,361 shares of ESI common stock, without interest and subject to a deduction for any required withholding tax.

⁽²⁾

Represents the vested but not issued portion of ESI share-based compensation awards as of the acquisition date of February 1, 2019.

Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed

The following table summarizes the final allocation of the purchase price to the fair values assigned to assets acquired and liabilities assumed at the date of the ESI Merger:

Current assets (excluding inventory)	$	208.0
Inventory		81.7
Intangible assets		316.2
Goodwill		474.0
Property, plant and equipment		65.5
Long-term assets		9.6
Total assets acquired		1,155.0
Current liabilities		51.5
Non-current deferred taxes		33.0
Other long-term liabilities		7.2
Total liabilities assumed		91.7
Fair value of assets acquired and liabilities assumed		1,063.3
Less: Cash and cash equivalents acquired		(44.1	)
Total purchase price, net of cash and cash equivalents acquired	$	1,019.2

Schedule of Unaudited Pro Forma Financial Information

	Three Months Ended March 31, 2019
Total net revenues	$	478.1
Net income	$	39.7
Net income per share:
Basic	$	0.72
Diluted	$	0.72

Precisive, LLC [Member]

Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives

The following table reflects the allocation of the acquired intangible assets and related estimate of useful lives:

Completed technology - Laser	$	255.7	12 years
Completed technology - Non-Laser		18.3	10 years
Trademarks and trade names		14.4	7 years
Customer relationships		25.4	10 years
Backlog		2.4	1 year
	$	316.2

Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

The changes in the carrying amount of goodwill and accumulated impairment loss during the three months ended March 31, 2020 and year ended December 31, 2019 were as follows:

	Three Months Ended March 31, 2020									Twelve Months Ended December 31, 2019
	Gross Carrying Amount			Accumulated Impairment Loss			Net			Gross Carrying Amount			Accumulated Impairment Loss			Net
Beginning balance at January 1	$	1,202.8		$	(144.3	)	$	1,058.5		$	731.3		$	(144.3	)	$	587.0
Acquired goodwill		—			—			—			474.0			—			474.0
Foreign currency translation		(2.1	)		—			(2.1	)		(2.5	)		—			(2.5	)
Ending balance at March 31, 2020 and December 31, 2019	$	1,200.7		$	(144.3	)	$	1,056.4		$	1,202.8		$	(144.3	)	$	1,058.5

Intangible Assets

Components of the Company’s intangible assets are comprised of the following:

As of March 31, 2020:	Gross		Accumulated Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology	$	446.4	$	(0.1	)	$	(188.6	)	$	(0.4	)	$	257.3
Customer relationships		308.2		(1.4	)	$	(89.1	)	$	(1.8	)	$	215.9
Patents, trademarks, trade names and other		120.9		—		$	(46.6	)	$	0.2		$	74.5
	$	875.5	$	(1.5	)	$	(324.3	)	$	(2.0	)	$	547.7

As of December 31, 2019:	Gross		Accumulated Impairment Charges			Accumulated Amortization			Foreign Currency Translation			Net
Completed technology⁽¹⁾	$	446.4	$	(0.1	)	$	(178.3	)	$	(0.2	)	$	267.8
Customer relationships⁽¹⁾		308.2		(1.4	)		(84.2	)		(1.4	)		221.2
Patents, trademarks, trade names and other⁽²⁾		120.9		—			(45.5	)		0.2			75.6
	$	875.5	$	(1.5	)	$	(308.0	)	$	(1.4	)	$	564.6

⁽¹⁾

⁽²⁾

Estimated Net Amortization Expense

Aggregate net amortization expense related to acquired intangible assets for future years is as follows:

Year	Amount
2020 (remaining)	$	41.0
2021	$	46.1
2022	$	45.2
2023	$	44.9
2024	$	44.0
2025	$	43.6
Thereafter	$	227.0

Debt (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Short-Term Debt

	March 31, 2020		December 31, 2019
Short-term debt:
Japanese lines of credit	$	4.1	$	2.5
Japanese receivables financing facility		1.2		0.6
Term Loan Facility		9.0		9.0
	$	14.3	$	12.1

Schedule of Long-Term Debt

	March 31, 2020		December 31, 2019
Long-term debt:
Term Loan Facility, net⁽¹⁾	$	820.4	$	871.6
Other debt		—		0.1
	$	820.4	$	871.7

⁽¹⁾

Net of deferred financing fees, original issue discount and repricing fees of $10.7 and $11.8 as of March 31, 2020 and December 31, 2019, respectively.

Schedule of Contractual Maturities of Debt Obligations

Contractual maturities of the Company’s debt obligations as of March 31, 2020 are as follows:

Year	Amount
2020 (remaining)	$	12.0
2021		9.0
2022		9.0
2023		9.0
2024		9.0
2025		9.0
Thereafter	$	788.4

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Product Warranties (Tables)

3 Months Ended

Mar. 31, 2020

Guarantees And Product Warranties [Abstract]

Product Warranty Activities

Product warranty activities were as follows:

	Three Months Ended March 31,
	2020			2019
Beginning of period	$	14.9		$	10.4
Assumed product warranty liability from ESI Merger		—			7.2
Provision for product warranties		6.7			6.0
Direct and other charges to warranty liability		(6.3	)		(6.7	)
End of period⁽¹⁾	$	15.3		$	16.9

⁽¹⁾

Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share:

	Three Months Ended March 31,
	2020		2019
Numerator:
Net income	$	69.1	$	12.5
Denominator:
Shares used in net income per common share – basic		54,918,000		54,147,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan		318,000		701,000
Shares used in net income per common share – diluted		55,236,000		54,848,000
Net income per common share:
Basic	$	1.26	$	0.23
Diluted	$	1.25	$	0.23

Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Schedule of Total Stock-Based Compensation Expense Included in Company's Consolidated Statements of Income and Comprehensive Income

The total stock-based compensation expense included in the Company’s consolidated statements of income and comprehensive income was as follows:

	Three Months Ended March 31,
	2020		2019
Cost of revenues	$	1.0	$	0.4
Research and development		1.1		0.8
Selling, general and administrative		5.9		8.0
Acquisition and integration cost		0.5		18.6
Total pre-tax stock-based compensation expense	$	8.5	$	27.8

Summary of Activity for RSUs

The following table presents the activity for RSUs under the Plan:

	Three Months Ended March 31, 2020
	Outstanding RSUs			Weighted Average Grant Date Fair Value
RSUs – beginning of period		1,102,534		$	85.93
Accrued dividend shares		254		$	100.84
Granted		88,368		$	112.24
Vested		(446,503	)	$	84.06
Forfeited		(41,642	)	$	83.76
RSUs – end of period		703,011		$	90.56

Stock Appreciation Rights (SARs) [Member]

Summary of Activity for Outstanding and Exercisable Stock Appreciation Rights

The following table presents the activity for SARs under the Plan:

	Three Months Ended March 31, 2020
	Outstanding SARs			Weighted Average Grant Date Fair Value
SARs – beginning of period		108,854		$	29.05
Exercised		(16,216	)	$	23.87
Forfeited or expired		—		$	—
SARs Outstanding – end of period		92,638		$	30.0

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Net Revenues, Assets and Goodwill by Reportable Segment

The following table sets forth net revenues by reportable segment:

	Three Months Ended March 31,
	2020		2019
Vacuum & Analysis	$	319.3	$	234.4
Light & Motion		165.4		194.0
Equipment & Solutions		51.0		35.2
	$	535.7	$	463.6

The following table sets forth segment assets by reportable segment:

March 31, 2020:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	196.1	$	158.6	$	57.7	$	(31.4	)	$	381.0
Inventory, net		227.2		174.5		72.4		0.1			474.2
Total segment assets	$	423.3	$	333.1	$	130.1	$	(31.3	)	$	855.2

December 31, 2019:	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Corporate, Eliminations & Other			Total
Segment assets:
Accounts receivable	$	185.9	$	147.2	$	40.1	$	(32.1	)	$	341.1
Inventory, net		224.8		163.7		73.5		0.1			462.1
Total segment assets	$	410.7	$	310.9	$	113.6	$	(32.0	)	$	803.2

Goodwill associated with each of the Company’s reportable segments is as follows:

	March 31, 2020		December 31, 2019
Reportable segment:
Vacuum & Analysis	$	196.1	$	196.7
Light & Motion		387.4		388.5
Equipment & Solutions		472.9		473.3
Total goodwill	$	1,056.4	$	1,058.5

Reconciliation of Segment Gross Profit to Consolidated Net Income

The following table sets forth a reconciliation of segment gross profit to consolidated net income:

	Three Months Ended March 31,
	2020		2019
Gross profit by reportable segment:
Vacuum & Analysis	$	140.8	$	98.1
Light & Motion		75.6		92.9
Equipment & Solutions		23.2		7.1
Total gross profit by reportable segment		239.6		198.1
Operating expenses:
Research and development		42.4		38.9
Selling, general and administrative		87.2		82.5
Acquisition and integration costs		2.2		30.2
Restructuring and other		0.4		1.9
Fees and expenses related to repricing of Term Loan Facility		—		5.8
Amortization of intangible assets		16.3		15.7
Asset impairments		1.2		—
Income from operations		89.9		23.1
Interest income		0.7		1.7
Interest expense		8.9		9.1
Other expense, net		0.4		0.3
Income before income taxes		81.3		15.4
Provision for income taxes		12.2		2.9
Net income	$	69.1	$	12.5

Schedule of Capital Expenditures, Depreciation and Amortization Expense of Intangible Assets by Reportable Segment

The following table sets forth capital expenditures by reportable segment for the three months ended March 31, 2020 and 2019:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2020:
Capital expenditures	$	4.1	$	4.0	$	1.9	$	10.0
Three Months Ended March 31, 2019:
Capital expenditures	$	7.5	$	5.1	$	1.9	$	14.5

The following table sets forth depreciation and amortization by reportable segment for the three months ended March 31, 2020 and 2019:

	Vacuum & Analysis		Light & Motion		Equipment & Solutions		Total
Three Months Ended March 31, 2020:
Depreciation and amortization	$	4.9	$	13.4	$	10.1	$	28.4
Three Months Ended March 31, 2019
Depreciation and amortization	$	4.1	$	14.1	$	7.0	$	25.2

Reconciliation of Segment Assets to Consolidated Total Assets

The following is a reconciliation of segment assets to consolidated total assets:

	March 31, 2020		December 31, 2019
Total segment assets	$	855.2	$	803.2
Cash and cash equivalents and short-term investments		503.4		524.0
Other current assets		98.0		106.3
Property, plant and equipment, net		238.2		241.9
Right-of-use asset		127.1		64.5
Goodwill and intangible assets, net		1,604.1		1,623.1
Other assets		48.9		53.3
Consolidated total assets	$	3,474.9	$	3,416.3

Schedule of Net Revenues and Long-Lived Assets by Geographic Regions

Transfers between geographic areas are at tax transfer prices and have been eliminated from consolidated net revenues.

	Three Months Ended March 31,
	2020		2019
Net revenues:
United States	$	231.5	$	224.4
South Korea		76.0		35.8
China		49.7		37.8
Japan		39.9		42.1
Germany		34.5		38.1
Other		104.1		85.4
	$	535.7	$	463.6

Long-lived assets:⁽¹⁾	March 31, 2020		December 31, 2019
United States	$	273.3	$	208.3
Europe		37.7		41.4
Asia		84.2		89.6
	$	395.2	$	339.3

⁽¹⁾

Long-lived assets include property, plant and equipment, net, right-of-use assets, and certain other assets, and exclude goodwill, intangible assets and long-term tax-related accounts.

Worldwide Net Revenue for Each Group of Products

The Company groups its product offerings into three groups based upon the similarity of product function as follows:

	Three Months Ended March 31,
	2020		2019
Advanced Manufacturing Components	$	425.9	$	371.4
Global Service		74.5		66.2
Advanced Manufacturing Systems		35.3		26.0
	$	535.7	$	463.6

Restructurings and Other (Tables)

3 Months Ended

Mar. 31, 2020

Restructuring And Related Activities [Abstract]

Schedule of Company's Restructuring Activity

Restructuring activities were as follows:

	Three Months Ended March 31,
	2020			2019
Beginning of period	$	3.7		$	2.6
Charged to expense		0.9			0.2
Payments and adjustments		(1.7	)		(0.2	)
End of period	$	2.9		$	2.6

Leases - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Line Items]
Leases commenced during the period	$ 69.9
Weighted average discount rate	3.20%	3.80%
Weighted average remaining lease term	13 years 6 months	4 years 10 months 24 days
Operating cash flows used for operating leases	$ 5.1	$ 5.7
Remaining 2020 lease payment	3.7
Tenant improvement allowance	13.7
Undiscounted lease liability amount	$ 24.6
Year of lease commencement	2020
Minimum [Member]
Leases [Line Items]
Expected lease term	21 years

Leases - Lease expense (Detail) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2020

Mar. 31, 2019

Lease Cost:

Operating lease cost(1)

^[1]

$ 7.3

$ 5.0

Short-term lease

1.2

1.3

Total lease cost

$ 8.5

$ 6.3

[1]	Operating lease cost includes an immaterial amount of variable expenses and sublease rental income

Leases - Schedule of Future Lease Payments (Detail) $ in Millions	Mar. 31, 2020 USD ($)
Leases [Abstract]
2020 (remaining)	$ 3.7
2021	18.7
2022	13.3
2023	11.9
2024	11.3
Thereafter	107.4
Total lease payments	166.3
Less: imputed interest	36.5
Total operating lease liabilities	$ 129.8

Revenue from Contracts with Customers - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Accounting Standards Codification Topic 606 adjustment [Member]
Change in Contract with Customer, Liability [Line Items]
Contract assets	$ 3.4	$ 3.5

Revenue from Contracts with Customers - Schedule of Deferred Revenue and Customer Advances by Arrangement (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Change in Contract with Customer, Liability [Line Items]
Beginning balance, January 1	$ 24.8	$ 17.5
Additions to deferred revenue and customer advances	17.7	17.2
Amount of deferred revenue and customer advances recognized in income	(17.1)	(13.9)
Ending balance, March 31	$ 25.4	24.1
Electro Scientific Industries Inc [Member]
Change in Contract with Customer, Liability [Line Items]
Deferred revenue and customer advances in ESI Merger		$ 3.3

Revenue from Contracts with Customers - Schedule of Deferred Revenue and Customer Advances by Arrangement (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Change in Contract with Customer, Liability [Line Items]
Long-term deferred revenue	$ 3.5	$ 3.3
Deferred revenue and customer advances	21.9	21.5
Deferred Revenue [Member]
Change in Contract with Customer, Liability [Line Items]
Deferred revenue and customer advances	12.4	12.4
Customer Advances [Member]
Change in Contract with Customer, Liability [Line Items]
Deferred revenue and customer advances	$ 9.5	$ 9.1

Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 535.7	$ 463.6
Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	319.3	234.4
Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	165.4	194.0
Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	51.0	35.2
Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	461.2	397.4
Products [Member] \| Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	276.2	192.7
Products [Member] \| Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	149.7	178.7
Products [Member] \| Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	35.3	26.0
Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	74.5	66.2
Services [Member] \| Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	43.1	41.7
Services [Member] \| Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	15.7	15.3
Services [Member] \| Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 15.7	$ 9.2

Investments - Gross Unrealized Gains and (Losses) Aggregated by Investment Category (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	$ 61.5	$ 109.7
Investments, Gross Unrealized Gains	0.1
Investments, Gross Unrealized (Losses)	(0.2)	(0.3)
Investments, Estimated Fair Value	61.4	109.4
Time Deposits and Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	10.4	13.1
Investments, Estimated Fair Value	10.4	13.1
Bankers' Acceptance Drafts [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	2.4	4.0
Investments, Estimated Fair Value	2.4	4.0
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	26.4	61.5
Investments, Gross Unrealized (Losses)	(0.2)	(0.3)
Investments, Estimated Fair Value	26.2	61.2
U.S. Treasury Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	10.0	5.0
Investments, Estimated Fair Value	10.0	5.0
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	12.3	26.1
Investments, Gross Unrealized Gains	0.1
Investments, Estimated Fair Value	12.4	26.1
Group Insurance Contracts [Member] \| Long Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments, Cost	5.4	5.2
Investments, Gross Unrealized Gains	0.6	0.6
Investments, Estimated Fair Value	$ 6.0	$ 5.8

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	$ 61.4	$ 109.4
Short-term investments	61.4	109.4
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	26.2	61.2
Fair Value Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	110.3	65.2
Total assets	198.0	201.5
Total liabilities	16.2	6.8
Short-term investments	61.4	109.4
Other current assets	2.7	1.9
Total current assets	174.4	176.5
Long-term investments	6.0	5.8
Other assets	17.6	19.2
Total long-term assets	23.6	25.0
Fair Value Measurements, Recurring [Member] \| Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives – currency forward contracts	2.7	1.1
Derivatives – currency forward contracts	0.5	0.3
Fair Value Measurements, Recurring [Member] \| Interest Rate Hedge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives – interest rate hedge - current	0.5
Derivatives – interest rate hedge - non-current	15.2	6.5
Derivatives –interest rate hedge - current		0.8
Fair Value Measurements, Recurring [Member] \| Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	33.8	42.6
Available-for-sale investments	26.2	61.2
Fair Value Measurements, Recurring [Member] \| Group Insurance Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	6.0	5.8
Fair Value Measurements, Recurring [Member] \| Israeli Pension Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Pension assets	16.3	16.7
Fair Value Measurements, Recurring [Member] \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	16.9	0.6
Deferred compensation plan assets	0.1	0.5
Fair Value Measurements, Recurring [Member] \| U.S. Treasury Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	1.2	2.7
Available-for-sale investments	10.0	5.0
Fair Value Measurements, Recurring [Member] \| U.S. Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	58.4	17.1
Available-for-sale investments	12.4	26.1
Fair Value Measurements, Recurring [Member] \| Time Deposits and Certificates of Deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		2.2
Available-for-sale investments	10.4	13.1
Fair Value Measurements, Recurring [Member] \| Bankers' Acceptance Drafts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	2.4	4.0
Fair Value Measurements, Recurring [Member] \| Mutual Funds and Exchange Traded Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	1.2	2.0
Fair Value Measurements, Recurring [Member] \| Other Current Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities	1.0	0.3
Fair Value Measurements, Recurring [Member] \| Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities	15.2	6.5
Fair Value Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	16.9	0.6
Total assets	16.9	0.6
Total current assets	16.9	0.6
Fair Value Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	16.9	0.6
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	93.4	64.6
Total assets	181.1	200.9
Total liabilities	16.2	6.8
Short-term investments	61.4	109.4
Other current assets	2.7	1.9
Total current assets	157.5	175.9
Long-term investments	6.0	5.8
Other assets	17.6	19.2
Total long-term assets	23.6	25.0
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives – currency forward contracts	2.7	1.1
Derivatives – currency forward contracts	0.5	0.3
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Interest Rate Hedge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives – interest rate hedge - current	0.5
Derivatives – interest rate hedge - non-current	15.2	6.5
Derivatives –interest rate hedge - current		0.8
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	33.8	42.6
Available-for-sale investments	26.2	61.2
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Group Insurance Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	6.0	5.8
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Israeli Pension Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Pension assets	16.3	16.7
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	0.1	0.5
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| U.S. Treasury Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	1.2	2.7
Available-for-sale investments	10.0	5.0
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| U.S. Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	58.4	17.1
Available-for-sale investments	12.4	26.1
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Time Deposits and Certificates of Deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		2.2
Available-for-sale investments	10.4	13.1
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Bankers' Acceptance Drafts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investments	2.4	4.0
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Mutual Funds and Exchange Traded Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	1.2	2.0
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Other Current Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities	1.0	0.3
Fair Value Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities	$ 15.2	$ 6.5

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Cash/Non-negotiable time deposits-not subject to fair value disclosure requirements	$ 331.7	$ 349.4

Derivatives - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Sep. 30, 2016	Mar. 31, 2020	Dec. 31, 2019	Apr. 03, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum period for hedging a portion of forecasted foreign currency denominated intercompany sales of inventory		18 months
Accumulated other comprehensive income realization period		12 months
Interest Rate Hedge [Member] \| Newport Corporation \| Term Loan Credit Agreement [Member] \| Secured Debt Repricing Amendment One
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swap agreement, maturity date	Sep. 30, 2020
Percentage of debt which is subject to interest rate swap fixed rate	50.00%
Interest rate swap agreement, interest rate	1.198%
Interest rate swap agreement, credit spread rate		1.75%
Interest rate swap agreement, notional amount		$ 250.0	$ 250.0
Interest rate swap agreement, fair value		$ 0.5	0.8
Interest rate swap agreement, interest rate description		the Company entered into an interest rate swap agreement, which has a maturity date of September 30, 2020, to fix the rate on approximately 50% of its then-outstanding balance under the 2016 Term Loan Facility, as described further in Note 11. This hedge fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 1.75% as of March 31, 2020. At March 31, 2020, the notional amount of this transaction was $250.0 and it had a fair value liability of $0.5. At December 31, 2019, the notional amount of this transaction was $250.0 and it had a fair value asset of $0.8.
Interest Rate Hedge [Member] \| Newport Corporation \| Incremental Term Loan Facility \| Secured Debt Repricing Amendment One
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swap agreement, interest rate				2.309%
Interest rate swap agreement, credit spread rate		1.75%
Interest rate swap agreement, notional amount		$ 300.0	300.0	$ 300.0
Interest rate swap agreement, fair value		15.3	6.5
Forward Exchange Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional values of outstanding forward foreign exchange contracts		$ 104.4	$ 154.7

Derivatives - Summary of Primary Net Hedging Positions and Corresponding Fair Values (Detail) - Forward Exchange Contracts [Member] - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$ 104.4	$ 154.7
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	2.2	(0.2)
U.S. Dollar/Japanese Yen [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	34.4	45.9
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	(0.2)	0.1
U.S. Dollar/South Korean Won [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	32.5	51.7
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	1.8	0.2
U.S. Dollar/Euro [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	10.1	15.7
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	0.4	0.2
U.S. Dollar/U.K. Pound Sterling [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	5.3	8.3
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	0.3	(0.2)
U.S. Dollar/Taiwan Dollar [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	22.1	33.1
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	$ (0.1)	$ (0.5)

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - Derivatives Designated as Hedging Instruments [Member] - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Total net derivative liability designated as hedging instruments	$ (13.6)	$ (5.9)
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2.7	1.1
Derivative liabilities	(0.5)	(1.3)
Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative assets		0.8
Derivative liabilities	$ (15.8)	$ (6.5)

Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other Current Assets [Member] \| Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Forward foreign exchange contract derivative assets	$ 2.7	$ 1.1
Other Current Assets [Member] \| Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Interest rate hedge derivative assets		0.8
Other Current Liabilities [Member] \| Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Forward foreign exchange contract derivative liabilities	0.5	1.3
Other Current Liabilities [Member] \| Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Interest rate hedge derivative liabilities	0.5
Other Noncurrent Liabilities [Member] \| Interest Rate Hedge [Member]
Derivatives, Fair Value [Line Items]
Interest rate hedge derivative liabilities	$ 15.3	$ 6.5

Derivatives - Summary of Gains (Losses) on Derivatives Designated as Cash Flow Hedging Instruments (Detail) - Forward Exchange Contracts [Member] - Cash Flow Hedging [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in accumulated OCI	$ (6.0)	$ 0.1
Net gain (loss) reclassified from accumulated OCI into income	$ 0.7	$ 0.9

Derivatives - Summary of Gain on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Forward Exchange Contracts [Member]
Derivative Instruments Gain Loss Not Designated As Hedging Instruments [Line Items]
Net gain recognized in income	$ 0.2	$ 0.1

Inventories - Summary of Inventories (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 300.4	$ 288.8
Work-in-process	81.0	79.3
Finished goods	92.8	94.0
Inventories	$ 474.2	$ 462.1

Inventories - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventory related excess and obsolete charges	$ 6.2	$ 5.1

Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Feb. 01, 2019
Business Acquisition [Line Items]
Business acquisition share price			$ 30.00
Stock-based compensation expense	$ 8.5	$ 27.8
Electro Scientific Industries Inc [Member]
Business Acquisition [Line Items]
Business acquisition share price			$ 30.00
Fair value write-up of acquired finished goods inventory	7.6
Incremental costs of sales charge	5.1
Fair value excluding write-up of acquired property, plant and equipment	$ 39.3
Compensation expense		2.7
Stock-based compensation expense		$ 14.0

Acquisitions - Summary of Purchase Price (Detail) - USD ($) $ in Millions		3 Months Ended
	Feb. 01, 2019	Mar. 31, 2019
Acquisition Date [Line Items]
Total purchase price, net of cash and cash equivalents acquired		$ 988.6
Electro Scientific Industries Inc [Member]
Acquisition Date [Line Items]
Cash paid for outstanding shares	$ 1,032.7
Settlement of share-based compensation awards	30.6
Total purchase price	1,063.3
Less: Cash and cash equivalents acquired	(44.1)
Total purchase price, net of cash and cash equivalents acquired	$ 1,019.2

Acquisitions - Summary of Purchase Price (Parenthetical) (Detail)	Feb. 01, 2019 $ / shares shares
Business Combinations [Abstract]
Business acquisition share price \| $ / shares	$ 30.00
Business acquisition number of shares acquired \| shares	34,422,361

Acquisitions - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions		3 Months Ended
	Feb. 01, 2019	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Acquisition Date [Line Items]
Goodwill			$ 1,056.4	$ 1,058.5	$ 587.0
Total purchase price, net of cash and cash equivalents acquired		$ 988.6
Electro Scientific Industries Inc [Member]
Acquisition Date [Line Items]
Current assets (excluding inventory)	$ 208.0
Inventory	81.7
Intangible assets	316.2
Goodwill	474.0
Property, plant and equipment	65.5
Long-term assets	9.6
Total assets acquired	1,155.0
Current liabilities	51.5
Non-current deferred taxes	33.0
Other long-term liabilities	7.2
Total liabilities assumed	91.7
Fair value of assets acquired and liabilities assumed	1,063.3
Less: Cash and cash equivalents acquired	(44.1)
Total purchase price, net of cash and cash equivalents acquired	$ 1,019.2

Acquisitions - Allocation of Acquired Intangible Assets and Liabilities Related Estimates of Useful Lives (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ in Millions		12 Months Ended
	Feb. 01, 2019	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 316.2	$ 316.2
Completed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price		274.0
Completed Technology [Member] \| Lasers Products [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 255.7
Estimated useful life of finite-lived intangible assets	12 years
Completed Technology [Member] \| Non Laser Products [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 18.3
Estimated useful life of finite-lived intangible assets	10 years
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 14.4
Estimated useful life of finite-lived intangible assets	7 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 25.4	$ 25.4
Estimated useful life of finite-lived intangible assets	10 years
Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 2.4
Estimated useful life of finite-lived intangible assets	1 year

Acquisitions - Schedule of Unaudited Pro Forma Financial Information (Detail) - Electro Scientific Industries Inc [Member] $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) $ / shares
Acquisition Date [Line Items]
Total net revenues \| $	$ 478.1
Net income \| $	$ 39.7
Net income per share:
Basic \| $ / shares	$ 0.72
Diluted \| $ / shares	$ 0.72

Goodwill and Intangible Assets - Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance, Goodwill Gross Carrying Amount	$ 1,202.8	$ 731.3
Acquired goodwill, Gross Carrying Amount		474.0
Foreign currency translation, Gross Carrying Amount	(2.1)	(2.5)
Ending balance, Goodwill Gross Carrying Amount	1,200.7	1,202.8
Beginning balance, Accumulated Impairment Loss	(144.3)	(144.3)
Ending balance, Accumulated Impairment Loss	(144.3)	(144.3)
Beginning balance, Goodwill Net	1,058.5	587.0
Acquired goodwill, Net		474.0
Foreign currency translation, Net	(2.1)	(2.5)
Ending balance, Goodwill Net	$ 1,056.4	$ 1,058.5

Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$ 875.5	$ 875.5
Accumulated Impairment Charges	(1.5)	(1.5)
Accumulated Amortization	(324.3)	(308.0)
Foreign Currency Translation	(2.0)	(1.4)
Intangible assets, net	547.7	564.6
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	446.4	446.4
Accumulated Impairment Charges	(0.1)	(0.1)
Accumulated Amortization	(188.6)	(178.3)
Foreign Currency Translation	(0.4)	(0.2)
Intangible assets, net	257.3	267.8
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	308.2	308.2
Accumulated Impairment Charges	(1.4)	(1.4)
Accumulated Amortization	(89.1)	(84.2)
Foreign Currency Translation	(1.8)	(1.4)
Intangible assets, net	215.9	221.2
Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	120.9	120.9
Accumulated Amortization	(46.6)	(45.5)
Foreign Currency Translation	0.2	0.2
Intangible assets, net	$ 74.5	$ 75.6

Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Millions		12 Months Ended
	Feb. 01, 2019	Dec. 31, 2019	Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		$ 308.0	$ 324.3
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		84.2	89.1
Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		45.5	$ 46.6
Electro Scientific Industries Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 316.2	316.2
Finite lived intangible asset , gross favorable lease		6.4
Electro Scientific Industries Inc [Member] \| Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price		274.0
Electro Scientific Industries Inc [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price	$ 25.4	25.4
Electro Scientific Industries Inc [Member] \| Trademarks Tradenames and Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, purchase price		16.8
Electro Scientific Industries Inc [Member] \| Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		$ 3.4

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Goodwill And Intangible Assets [Line Items]
Amortization of intangible assets	$ 16.3	$ 15.7
Trademarks and Trade Names [Member]
Goodwill And Intangible Assets [Line Items]
Un-amortized Intangible assets, net	$ 55.9

Goodwill and Intangible Assets - Estimated Net Amortization Expense (Detail) $ in Millions	Mar. 31, 2020 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2020 (remaining)	$ 41.0
2021	46.1
2022	45.2
2023	44.9
2024	44.0
2025	43.6
Thereafter	$ 227.0

Debt - Senior Secured Term Loan Credit Facility - Additional Information (Detail) - USD ($) $ in Millions				3 Months Ended	12 Months Ended
	Sep. 27, 2019	Feb. 01, 2019	Sep. 30, 2016	Mar. 31, 2020	Dec. 31, 2019	Apr. 03, 2019
Debt Instrument [Line Items]
Debt instrument, prepaid principal amount				$ 575.0
2016 Term Loan Facility [Member] \| Repricing Amendment [Member] \| LIBOR [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				4.00%
2016 Term Loan Facility [Member] \| Repricing Amendment [Member] \| LIBOR [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				1.75%
2016 Term Loan Facility [Member] \| Repricing Amendment [Member] \| LIBOR Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				0.75%
2016 Term Loan Facility [Member] \| Incremental Term Loan Facility \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				2.00%	1.75%
LIBOR floor rate				1.00%	0.75%
Newport Corporation \| Secured Debt [Member] \| Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				0.00%
Newport Corporation \| Secured Debt [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				0.75%
Newport Corporation \| 2016 Term Loan Facility [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Secured term loan, face amount				$ 780.0
Term loan maturity date				Apr. 29, 2023
Debt instrument, interest rate terms				borrowings under the Term Loan Facility bear interest per annum at one of the following rates selected by the Company: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, (3) a London Interbank Offer Rate (“LIBOR”) rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%, and (4) a floor of 1.75%, plus, in each case, an applicable margin; or (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, subject to a LIBOR rate floor of 0.0%, plus an applicable margin. The Company has elected the interest rate as described in clause (b) of the foregoing sentence. The Term Loan Credit Agreement provides that, unless an alternate rate of interest is agreed, all loans will be determined by reference to the base rate if the LIBOR rate cannot be ascertained, if regulators impose material restrictions on the authority of a lender to make LIBOR rate loans, or for other reasons. The 2016 Term Loan Facility was issued with original issue discount of 1.00% of the principal amount thereof.
Debt instrument, interest rate				0.00%
Debt instrument, issue discount percentage on principal				1.00%
Deferred finance fees, original issue discount and re-pricing fee, gross				$ 28.7
Newport Corporation \| 2016 Term Loan Facility [Member] \| Secured Debt [Member] \| Interest Rate Hedge [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date			Sep. 30, 2020
Interest rate swap agreement, notional amount			$ 335.0	$ 250.0
Interest rate swap agreement, interest rate			1.198%
Interest rate swap agreement, credit spread rate				1.75%
Interest rate swap agreement, fair value liability				$ 0.5
Newport Corporation \| 2016 Term Loan Facility [Member] \| Secured Debt [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				0.50%
Newport Corporation \| 2016 Term Loan Facility [Member] \| Secured Debt [Member] \| Adjusted One Month LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				1.00%
Newport Corporation \| 2016 Term Loan Facility [Member] \| Secured Debt [Member] \| Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				1.75%
Newport Corporation \| 2016 Term Loan Facility [Member] \| Incremental Term Loan Facility
Debt Instrument [Line Items]
Deferred finance fees, original issue discount and re-pricing fee, gross				$ 11.4
Newport Corporation \| 2016 Term Loan Facility [Member] \| Secured Debt Repricing Amendment One \| Interest Rate Hedge [Member]
Debt Instrument [Line Items]
Interest rate swap agreement, notional amount				$ 250.0	$ 250.0
Interest rate swap agreement, interest rate			1.198%
Interest rate swap agreement, credit spread rate				1.75%
Newport Corporation \| Incremental Term Loan Facility \| Secured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate terms				The 2019 Term Loan Refinancing Facility matures on February 2, 2026, and bears interest at a rate per annum equal to, at the Company’s option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 0.75% with respect to base rate borrowings and 1.75% with respect to LIBOR borrowings. The 2019 Term Loan Refinancing Facility was issued with original issue discount of 0.25% of the principal amount thereof.
Debt instrument, prepaid principal amount	$ 50.0
Newport Corporation \| Incremental Term Loan Facility \| Secured Debt Repricing Amendment One
Debt Instrument [Line Items]
Secured term loan, face amount				$ 840.1
Term loan maturity date				Feb. 02, 2026
Debt instrument, interest rate				3.35%
Debt instrument, prepaid principal amount				$ 14.9
Debt instrument, frequency of periodic payment				quarterly
Debt instrument, periodic payment percentage				0.25%
Newport Corporation \| Incremental Term Loan Facility \| Secured Debt Repricing Amendment One \| Interest Rate Hedge [Member]
Debt Instrument [Line Items]
Interest rate swap agreement, notional amount				$ 300.0	300.0	$ 300.0
Interest rate swap agreement, interest rate						2.309%
Interest rate swap agreement, credit spread rate				1.75%
Newport Corporation \| 2019 Term Loan Refinancing Facility [Member]
Debt Instrument [Line Items]
Deferred finance fees, original issue discount and re-pricing fee, gross				$ 10.7	$ 2.2
Newport Corporation \| 2019 Term Loan Refinancing Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				1.75%
Newport Corporation \| 2019 Term Loan Refinancing Facility [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Secured term loan, face amount	$ 896.8
Term loan maturity date				Feb. 02, 2026
Debt instrument, issue discount percentage on principal				0.25%
Electro Scientific Industries Inc [Member] \| 2016 Term Loan Facility [Member] \| Secured Debt [Member] \| Interest Rate Hedge [Member]
Debt Instrument [Line Items]
Term loan maturity date						Mar. 31, 2023
Interest rate swap agreement, notional amount				$ 300.0		$ 300.0
Interest rate swap agreement, interest rate						2.309%
Interest rate swap agreement, credit spread rate				1.75%
Interest rate swap agreement, fair value liability				$ 15.3
Electro Scientific Industries Inc [Member] \| Incremental Term Loan Facility \| Definitive Merger Agreement [Member]
Debt Instrument [Line Items]
Term loan maturity date		Feb. 01, 2026
Debt instrument, interest rate terms		Prior to the effectiveness of Amendment No. 6 (as defined below), the 2019 Incremental Term Loan Facility had a maturity date of February 1, 2026 and bore interest at a rate per annum equal to, at the Company’s option, a base rate or LIBOR rate (as described above) plus, in each case, an applicable margin equal to 1.25% with respect to base rate borrowings and 2.25% with respect to LIBOR borrowings.
Debt instrument, issue discount percentage on principal		1.00%
Electro Scientific Industries Inc [Member] \| Incremental Term Loan Facility \| Maximum [Member] \| Definitive Merger Agreement [Member]
Debt Instrument [Line Items]
Business acquisition, term loan debt financing		$ 650.0
Electro Scientific Industries Inc [Member] \| Incremental Term Loan Facility \| LIBOR [Member] \| Definitive Merger Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		2.25%
Electro Scientific Industries Inc [Member] \| Incremental Term Loan Facility \| Base Rate [Member] \| Definitive Merger Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		1.25%

Debt - Senior Secured Asset-Based Revolving Credit Facility - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2020 USD ($)
Debt Instrument [Line Items]
Availability under credit facility	$ 8,500,000
Percentage of commitment amount available	10.00%
Number of consecutive business days for borrowing base	30 days
Asset Based Credit Agreement [Member]
Debt Instrument [Line Items]
Availability under credit facility	$ 8,500,000
Percentage of commitment amount available	10.00%
Number of consecutive business days for borrowing base	3 days
Electro Scientific Industries Inc [Member] \| Asset Based Credit Agreement [Member] \| Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Secured term loan, face amount	$ 100,000,000.0
Electro Scientific Industries Inc [Member] \| Asset Based Credit Agreement [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Percentage of borrowing based on eligible accounts	85.00%
Percentage of borrowing based on lower of net book value of eligible inventory	20.00%
Percentage of borrowing base	30.00%
Percentage of borrowing based on lower of cost or market value of certain eligible inventory	65.00%
Percentage of borrowing based on net orderly liquidation value of certain eligible inventory	85.00%
Electro Scientific Industries Inc [Member] \| Asset Based Credit Agreement [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity in the form of letters of credit	$ 25,000,000.0
Newport Corporation \| Secured Debt [Member] \| Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	0.00%
Newport Corporation \| Asset Based Credit Agreement [Member] \| Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Clause to accelerate the scheduled maturities	If at any time the aggregate amount of outstanding loans, protective advances, unreimbursed letter of credit drawings and undrawn letters of credit under the ABL Facility exceeds the lesser of (a) the commitment amount and (b) the borrowing base, the Company is required to repay outstanding loans and/or cash collateralize letters of credit, with no reduction of the commitment amount. During any period that the amount available under the ABL Facility is less than the greater of (i) $8.5 and (ii) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base for three consecutive business days, until the time when excess availability has been at least the greater of (i) $8.5 and (ii) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base, in each case, for 30 consecutive calendar days (a “Cash Dominion Period”), or during the continuance of an event of default, the Company is required to repay outstanding loans and/or cash collateralize letters of credit with the cash that it is required to deposit daily in a collection account maintained with the administrative agent under the ABL Facility. During a Cash Dominion Period, the Company may make borrowings under the ABL Facility subject to the satisfaction of customary funding conditions.
Newport Corporation \| Asset Based Credit Agreement [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	0.50%
Debt instrument, interest rate terms	Borrowings under the ABL Facility bear interest at a rate per annum equal to, at the Company’s option, any of the following, plus, in each case, an applicable margin: (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the “prime rate” quoted in The Wall Street Journal, (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00% and (4) a floor of 0.00%; and (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, with a floor of 0.00%. The initial applicable margin for borrowings under the ABL Facility is 0.50% with respect to base rate borrowings and 1.50% with respect to LIBOR borrowings. Commencing with the completion of the first fiscal quarter ending after the closing of the ABL Facility, the applicable margin for borrowings thereunder is subject to upward or downward adjustment each fiscal quarter, based on the average historical excess availability during the preceding quarter.
Initial commitment fee percentage	0.25%
Number of consecutive business days for borrowing base	30 days
Debt instrument, collateral	All obligations under the ABL Facility are guaranteed by certain of the Company’s domestic subsidiaries and are collateralized by substantially all of the Company’s assets and the assets of such subsidiaries, subject to certain exceptions and exclusions
Clause to maintain a Fixed Charge Coverage Ratio	From the time when the Company has excess availability less than the greater of (a) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base and (b) $8.5 until the time when the Company has excess availability equal to or greater than the greater of (a) 10.0% of the lesser of (1) the commitment amount and (2) the borrowing base and (b) $8.5 for 30 consecutive days, or during the continuance of an event of default, the ABL Credit Agreement requires the Company to maintain a Fixed Charge Coverage Ratio (as defined in the ABL Credit Agreement) tested on the last day of each fiscal quarter of at least 1.0 to 1.0.
Newport Corporation \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Percentage of line of credit facility excess availability commitment fee	10.00%
Line of credit facility excess availability amount	$ 8,500,000
Newport Corporation \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Percentage of line of credit facility excess availability commitment fee	10.00%
Line of credit facility excess availability amount	$ 8,500,000
Fixed charge coverage ratio	1.0
Newport Corporation \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Adjusted One Month LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	1.00%
Newport Corporation \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Floor Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	0.00%
Newport Corporation \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	0.50%
Newport Corporation \| Asset Based Credit Agreement [Member] \| Secured Debt [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	1.50%

Debt - Lines of Credit and Short-Term Borrowing Arrangements -Additional Information (Detail) - Revolving Lines of Credit [Member] - Japan [Member] - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Aggregate borrowings expire and renewal period	3 months
Borrowing capacity in the form of letters of credit	$ 32,900,000
Total borrowings outstanding	$ 5,300,000	$ 3,100,000

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Debt - Schedule of Short-Term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Short term debt	$ 14.3	$ 12.1
Term Loan Facility [Member]
Short-term Debt [Line Items]
Short term debt	9.0	9.0
Japan [Member]
Short-term Debt [Line Items]
Short term debt	4.1	2.5
Japan [Member] \| Financing Facility [Member]
Short-term Debt [Line Items]
Short term debt	$ 1.2	$ 0.6

Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long term debt	$ 820.4	$ 871.7
Other debt		0.1
Term Loan Facility, Net [Member]
Debt Instrument [Line Items]
Long term debt	$ 820.4	$ 871.6

Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Term Loan Facility, Net [Member]
Debt Instrument [Line Items]
Deferred financing fees, original issuance discount and re-pricing fee	$ 10.7	$ 11.8

Debt - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Disclosure [Abstract]
Interest expense	$ 8.9	$ 9.1

Debt - Schedule of Contractual Maturities of Debt Obligations (Detail) $ in Millions	Mar. 31, 2020 USD ($)
Maturities Of Long Term Debt [Abstract]
2020 (remaining)	$ 12.0
2021	9.0
2022	9.0
2023	9.0
2024	9.0
2025	9.0
Thereafter	$ 788.4

Product Warranties - Product Warranty Activities (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Product Warranty Liability [Line Items]
Beginning of period	$ 14.9	$ 10.4
Provision for product warranties	6.7	6.0
Direct and other charges to warranty liability	(6.3)	(6.7)
End of period	$ 15.3	16.9
Electro Scientific Industries Inc [Member]
Product Warranty Liability [Line Items]
Assumed product warranty liability from ESI Merger		$ 7.2

Product Warranties - Product Warranty Activities (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019
Guarantees [Abstract]
Short-term product warranty	$ 12.2	$ 13.8
Long-term product warranty	$ 3.1	$ 3.1

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective tax rate	15.00%	18.80%
Limitation on deduction of executive compensation and state income taxes	$ 1.0
Gross unrecognized tax benefits excluding interest and penalties	44.1		$ 43.5
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate	36.1
Accrued interest on unrecognized tax benefits	0.6		$ 0.5
Net unrecognized tax benefits, excluding interest and penalties, related to foreign tax positions	$ 0.7

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net income	$ 69.1	$ 12.5
Denominator:
Shares used in net income per common share – basic	54,918,000	54,147,000
Effect of dilutive securities:
Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan	318,000	701,000
Shares used in net income per common share – diluted	55,236,000	54,848,000
Net income per common share:
Basic	$ 1.26	$ 0.23
Diluted	$ 1.25	$ 0.23

Net Income Per Share - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Number of shares excluded from computation of diluted earnings per share	36,100	128,200

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance	18,000,000
Total compensation expense related to unvested stock-based awards granted to employees, officers and directors	$ 27.9
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement	749,000
Restricted stock units, granted	88,368	182,000
Restricted stock units, weighted average grant date fair value	$ 112.24	$ 82.58
Restricted Stock Units (RSUs) [Member] \| ESI Plan member [Member] \| Outside Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Newport RSUs converted to MKS RSUs at Merger date	326,000
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted	0	0
Newport Corporation \| Restricted Stock Units (RSUs) [Member] \| ESI Plan member [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement	736,000
Newport Corporation \| Stock Appreciation Rights (SARs) [Member] \| ESI Plan member [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as per merger agreement	13,000

Stock-Based Compensation - Schedule of Total Stock-Based Compensation Expense Included in Company's Consolidated Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	$ 8.5	$ 27.8
Cost of Revenues [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	1.0	0.4
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	1.1	0.8
Selling, General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	5.9	8.0
Acquisition and Integration Cost [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total pre-tax stock-based compensation expense	$ 0.5	$ 18.6

Stock-Based Compensation - Summary of Activity for RSUs (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs/SARs – beginning of period	1,102,534
Granted	88,368	182,000
Vested	(446,503)
Forfeited	(41,642)
RSUs/SARs – end of period	703,011
RSUs/SARs, Weighted Average Grant Date Fair Value, Beginning of period	$ 85.93
Weighted Average Grant Date Fair Value, Granted	112.24	$ 82.58
Weighted Average Grant Date Fair Value, Vested	84.06
Weighted Average Grant Date Fair Value, Forfeited	83.76
RSUs/SARs, Weighted Average Grant Date Fair Value, end of period	$ 90.56
Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued dividend shares	254
Weighted Average Grant Date Fair Value, Accrued dividend shares	$ 100.84

Stock-Based Compensation - Summary of Activity for SARs (Detail) - Stock Appreciation Rights (SARs) [Member]	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs/SARs – beginning of period \| shares	108,854
Exercised, Outstanding SARs \| shares	(16,216)
RSUs/SARs – end of period \| shares	92,638
RSUs/SARs, Weighted Average Grant Date Fair Value, Beginning of period \| $ / shares	$ 29.05
Exercised, Weighted Average Grant Date Fair Value \| $ / shares	23.87
RSUs/SARs, Weighted Average Grant Date Fair Value, end of period \| $ / shares	$ 30.0

Stockholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended
	Jul. 25, 2011	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Common stock, value of shares authorized to repurchase	$ 200,000,000
Stock repurchase, shares	2,588,000	0	0
Value of shares repurchased	$ 127,000,000
Cash dividends per common share		$ 0.20	$ 0.20
Dividend payment to common shareholders		$ 11,000,000.0	$ 10,800,000

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2020 Segment Customer	Mar. 31, 2019 Customer
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment	2
Number of customers accounted for 10% or more of total revenue \| Customer	2	0
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member] \| Applied Materials, Inc. [Member]
Segment Reporting Information [Line Items]
Percentage of total net revenues	11.00%
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member] \| Lam Research Corporation [Member]
Segment Reporting Information [Line Items]
Percentage of total net revenues	10.00%

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 535.7	$ 463.6
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Net revenues	319.3	234.4
Light & Motion [Member]
Segment Reporting Information [Line Items]
Net revenues	165.4	194.0
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Net revenues	$ 51.0	$ 35.2

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Reconciliation of Segment Gross Profit to Consolidated Net Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Gross profit	$ 239.6	$ 198.1
Research and development	42.4	38.9
Selling, general and administrative	87.2	82.5
Acquisition and integration costs	2.2	30.2
Restructuring and other	0.4	1.9
Fees and expenses related to repricing of term loan facility		5.8
Amortization of intangible assets	16.3	15.7
Asset impairments	1.2
Income from operations	89.9	23.1
Interest income	0.7	1.7
Interest expense	8.9	9.1
Other expense, net	0.4	0.3
Income before income taxes	81.3	15.4
Provision for income taxes	12.2	2.9
Net income	69.1	12.5
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Gross profit	140.8	98.1
Light & Motion [Member]
Segment Reporting Information [Line Items]
Gross profit	75.6	92.9
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Gross profit	$ 23.2	$ 7.1

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Schedule of Capital Expenditures, Depreciation and Amortization Expense of Intangible Assets by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Capital expenditures	$ 10.0	$ 14.5
Depreciation and amortization	28.4	25.2
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Capital expenditures	4.1	7.5
Depreciation and amortization	4.9	4.1
Light & Motion [Member]
Segment Reporting Information [Line Items]
Capital expenditures	4.0	5.1
Depreciation and amortization	13.4	14.1
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Capital expenditures	1.9	1.9
Depreciation and amortization	$ 10.1	$ 7.0

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Segment Assets by Reportable Segment (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Accounts receivable	$ 381.0	$ 341.1
Inventory, net	474.2	462.1
Total assets	855.2	803.2
Operating Segments [Member] \| Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Accounts receivable	196.1	185.9
Inventory, net	227.2	224.8
Total assets	423.3	410.7
Operating Segments [Member] \| Light & Motion [Member]
Segment Reporting Information [Line Items]
Accounts receivable	158.6	147.2
Inventory, net	174.5	163.7
Total assets	333.1	310.9
Operating Segments [Member] \| Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Accounts receivable	57.7	40.1
Inventory, net	72.4	73.5
Total assets	130.1	113.6
Corporate, Eliminations & Other [Member]
Segment Reporting Information [Line Items]
Accounts receivable	(31.4)	(32.1)
Inventory, net	0.1	0.1
Total assets	$ (31.3)	$ (32.0)

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Consolidated total assets	$ 855.2	$ 803.2
Other current assets	98.0	106.3
Property, plant and equipment, net	238.2	241.9
Right-of-use asset	127.1	64.5
Other assets	42.9	47.5
Consolidated total assets	3,474.9	3,416.3
Segment Reconciling Items [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents and short-term investments	503.4	524.0
Other current assets	98.0	106.3
Property, plant and equipment, net	238.2	241.9
Right-of-use asset	127.1	64.5
Goodwill and intangible assets, net	1,604.1	1,623.1
Other assets	48.9	53.3
Consolidated total assets	$ 3,474.9	$ 3,416.3

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Schedule of Net Revenues and Long-Lived Assets by Geographic Regions (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 535.7	$ 463.6
Long-lived assets	395.2		$ 339.3
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	231.5	224.4
Long-lived assets	273.3		208.3
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	76.0	35.8
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	49.7	37.8
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	39.9	42.1
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	34.5	38.1
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	104.1	$ 85.4
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	37.7		41.4
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 84.2		$ 89.6

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Summary of Goodwill Associated with Reportable Segments (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Goodwill	$ 1,056.4	$ 1,058.5	$ 587.0
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Goodwill	196.1	196.7
Light & Motion [Member]
Segment Reporting Information [Line Items]
Goodwill	387.4	388.5
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 472.9	$ 473.3

Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Worldwide Net Revenue for Each Group of Products (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue from External Customer [Line Items]
Net revenues	$ 535.7	$ 463.6
Advanced Manufacturing Components [Member]
Revenue from External Customer [Line Items]
Net revenues	425.9	371.4
Global Service [Member]
Revenue from External Customer [Line Items]
Net revenues	74.5	66.2
Advanced Manufacturing Systems [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 35.3	$ 26.0

Restructurings and Other - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Other Cost [Line Items]
Restructuring charges	$ 0.9	$ 0.2
Newport Corporation
Restructuring Cost and Other Cost [Line Items]
Insurance reimbursement received	$ 0.5
Legal settlement from a contractual obligation		$ 1.7

Restructurings and Other - Schedule of Company's Restructuring Activity (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring And Related Activities [Abstract]
Beginning of period	$ 3.7	$ 2.6
Restructuring charges	0.9	0.2
Payments and adjustments	(1.7)	(0.2)
End of period	$ 2.9	$ 2.6