Acquisition - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions			12 Months Ended
	Jul. 15, 2021	Feb. 01, 2019	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2020
Acquisition Date [Line Items]
Goodwill			$ 1,228.2	$ 1,058.5	$ 1,066.4
Total purchase price, net of cash and cash equivalents acquired			$ 268.4	$ 988.6
Photon Control Inc [Member]
Acquisition Date [Line Items]
Current assets	$ 51.4
Intangible assets	121.2
Goodwill	168.0
Other non-current assets	8.6
Total assets acquired	349.2
Current liabilities	13.7
Non-current deferred taxes	32.1
Other long-term liabilities	0.7
Total liabilities assumed	46.5
Fair value of assets acquired and liabilities assumed	302.7
Less: Cash and cash equivalents acquired	(34.3)
Total purchase price, net of cash and cash equivalents acquired	$ 268.4
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
Other non-current 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