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Goodwill and Intangible Assets - Acquired Intangible Assets (Parenthetical) (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 01, 2019 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 316.2 | $ 316.2
Completed Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price |  | 274.0
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 25.4 | 25.4
Trademarks Tradenames And Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price |  | $ 16.8

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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