Segment Information - Financial Information by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 865.9	$ 710.0
Segment income	157.1	100.7
Operating Segments
Segment Reporting Information [Line Items]
Net sales	865.9	710.0
Segment income	164.4	111.5
Consumer Solutions | Operating Segments
Segment Reporting Information [Line Items]
Net sales	521.4	388.8
Segment income	131.0	84.8
Industrial & Flow Technologies | Operating Segments
Segment Reporting Information [Line Items]
Net sales	344.1	320.9
Segment income	50.0	44.7
Other | Operating Segments
Segment Reporting Information [Line Items]
Net sales	0.4	0.3
Segment income	$ (16.6)	$ (18.0)