Revenue - Geographic Net Sales Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 865.9	$ 710.0
Residential
Disaggregation of Revenue [Line Items]
Net sales	571.7	415.8
Commercial
Disaggregation of Revenue [Line Items]
Net sales	137.6	141.4
Industrial
Disaggregation of Revenue [Line Items]
Net sales	156.6	152.8
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	586.6	464.0
Western Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	115.3	103.8
Developing
Disaggregation of Revenue [Line Items]
Net sales	105.4	94.5
Other Developed
Disaggregation of Revenue [Line Items]
Net sales	$ 58.6	$ 47.7