Revenue - Geographic Net Sales Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 941.1	$ 713.3	$ 1,807.0	$ 1,423.3
Residential
Disaggregation of Revenue [Line Items]
Net sales	599.5	439.7	1,171.2	855.5
Commercial
Disaggregation of Revenue [Line Items]
Net sales	173.2	124.4	310.8	265.8
Industrial
Disaggregation of Revenue [Line Items]
Net sales	168.4	149.2	325.0	302.0
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	639.1	482.7	1,225.7	946.7
Western Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	120.7	84.9	236.0	188.7
Developing
Disaggregation of Revenue [Line Items]
Net sales	120.5	100.4	225.9	194.9
Other Developed
Disaggregation of Revenue [Line Items]
Net sales	$ 60.8	$ 45.3	$ 119.4	$ 93.0