Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Schedule of Capital Expenditures, Depreciation and Amortization Expense of Intangible Assets by Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Capital expenditures	$ 84.9	$ 63.9	$ 62.9
Depreciation and amortization	99.2	110.0	79.8
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Capital expenditures	36.0	34.1	40.1
Depreciation and amortization	20.3	16.8	20.8
Light & Motion [Member]
Segment Reporting Information [Line Items]
Capital expenditures	32.1	23.0	22.8
Depreciation and amortization	43.2	53.9	$ 59.0
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Capital expenditures	16.8	6.8
Depreciation and amortization	$ 35.7	$ 39.3