Basis of Presentation and Summary of Significant Accounting Policies - Net Sales Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 4,176.0	$ 4,082.8	$ 4,104.5
Residential
Disaggregation of Revenue [Line Items]
Net sales	2,389.1	2,191.5	2,134.0
Commercial
Disaggregation of Revenue [Line Items]
Net sales	1,003.2	1,117.2	1,177.2
Industrial
Disaggregation of Revenue [Line Items]
Net sales	783.7	774.1	793.3
United States
Disaggregation of Revenue [Line Items]
Net sales	2,938.1	2,833.6	2,835.9
Western Europe
Disaggregation of Revenue [Line Items]
Net sales	496.0	493.3	471.9
Developing
Disaggregation of Revenue [Line Items]
Net sales	507.8	527.2	558.0
Other Developed
Disaggregation of Revenue [Line Items]
Net sales	$ 234.1	$ 228.7	$ 238.7