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Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 693.9	$ 535.7
Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	605.0	461.2
Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	88.9	74.5
Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	435.8	319.3
Vacuum & Analysis [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	379.2	276.2
Vacuum & Analysis [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	56.6	43.1
Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	182.0	165.4
Light & Motion [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	165.0	149.7
Light & Motion [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	17.0	15.7
Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	76.1	51.0
Equipment & Solutions [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	60.8	35.3
Equipment & Solutions [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 15.3	$ 15.7

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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