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	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Capital expenditures	$ 29.0	$ 16.5	$ 59.9	$ 44.7
Depreciation and amortization	23.3	27.2	75.8	79.9
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Capital expenditures	9.7	7.4	28.8	21.6
Depreciation and amortization	5.1	4.2	15.1	12.2
Light & Motion [Member]
Segment Reporting Information [Line Items]
Capital expenditures	12.9	6.8	21.4	16.9
Depreciation and amortization	9.6	13.0	33.5	40.4
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Capital expenditures	6.4	2.3	9.7	6.2
Depreciation and amortization	$ 8.6	$ 10.0	$ 27.2	$ 27.3