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Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 741.9	$ 589.8	$ 2,185.7	$ 1,669.8
Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	649.1	506.8	1,910.8	1,441.0
Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	92.8	83.0	274.9	228.8
Vacuum & Analysis [Member]
Disaggregation of Revenue [Line Items]
Net revenues	483.1	361.3	1,376.6	995.1
Vacuum & Analysis [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	425.7	313.9	1,203.7	863.5
Vacuum & Analysis [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	57.4	47.4	172.9	131.6
Light & Motion [Member]
Disaggregation of Revenue [Line Items]
Net revenues	208.7	175.9	583.6	507.3
Light & Motion [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	190.8	156.9	531.5	457.3
Light & Motion [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	17.9	19.0	52.1	50.0
Equipment & Solutions [Member]
Disaggregation of Revenue [Line Items]
Net revenues	50.1	52.6	225.5	167.4
Equipment & Solutions [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	32.6	36.0	175.6	120.2
Equipment & Solutions [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 17.5	$ 16.6	$ 49.9	$ 47.2

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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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