Basis of Presentation and Summary of Significant Accounting Policies - Net Sales Information (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	[1]	$ 3,764.8	$ 3,017.8	$ 2,957.2
Residential
Disaggregation of Revenue [Line Items]
Net sales		2,437.6	1,883.4	1,668.2
Commercial
Disaggregation of Revenue [Line Items]
Net sales		665.9	528.6	627.3
Industrial
Disaggregation of Revenue [Line Items]
Net sales		661.3	605.8	661.7
U.S.
Disaggregation of Revenue [Line Items]
Net sales		2,571.2	2,011.7	1,866.7
Western Europe
Disaggregation of Revenue [Line Items]
Net sales		460.4	375.3	401.6
Developing
Disaggregation of Revenue [Line Items]
Net sales		487.1	427.5	480.6
Other Developed
Disaggregation of Revenue [Line Items]
Net sales		$ 246.1	$ 203.3	$ 208.3

[1] (1) One customer in the Consumer Solutions’ pool business represented approximately 20%, 15%, and 15% of our consolidated net sales in 2021, 2020 and 2019, respectively.