Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Reconciliation of Segment Gross Profit to Consolidated Net Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Gross profit	$ 239.6	$ 198.1
Research and development	42.4	38.9
Selling, general and administrative	87.2	82.5
Acquisition and integration costs	2.2	30.2
Restructuring and other	0.4	1.9
Fees and expenses related to repricing of term loan facility		5.8
Amortization of intangible assets	16.3	15.7
Asset impairments	1.2
Income from operations	89.9	23.1
Interest income	0.7	1.7
Interest expense	8.9	9.1
Other expense, net	0.4	0.3
Income before income taxes	81.3	15.4
Provision for income taxes	12.2	2.9
Net income	69.1	12.5
Vacuum & Analysis [Member]
Segment Reporting Information [Line Items]
Gross profit	140.8	98.1
Light & Motion [Member]
Segment Reporting Information [Line Items]
Gross profit	75.6	92.9
Equipment & Solutions [Member]
Segment Reporting Information [Line Items]
Gross profit	$ 23.2	$ 7.1