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Business Segment, Geographic Area, and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net revenues	$ 693.9	$ 535.7
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Net revenues	435.8	319.3
Light & Motion [Member]
Segment Reporting Information [Line Items]
Net revenues	182.0	165.4
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Net revenues	$ 76.1	$ 51.0

X

- Definition

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.

+ References

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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

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