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Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 749.9	$ 544.3	$ 1,443.8	$ 1,080.0
Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	656.7	473.0	1,261.7	934.2
Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	93.2	71.3	182.1	145.8
Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	457.7	314.5	893.5	633.8
Vacuum & Analysis [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	398.7	273.4	777.9	549.6
Vacuum & Analysis [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	59.0	41.1	115.6	84.2
Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	192.9	166.0	374.9	331.4
Light & Motion [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	175.7	150.7	340.7	300.4
Light & Motion [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	17.2	15.3	34.2	31.0
Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	99.3	63.8	175.4	114.8
Equipment & Solutions [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	82.3	48.9	143.1	84.2
Equipment & Solutions [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 17.0	$ 14.9	$ 32.3	$ 30.6

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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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