Revenue - Geographic Net Sales Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 969.2	$ 798.5	$ 2,776.2	$ 2,221.8
Residential
Disaggregation of Revenue [Line Items]
Net sales	628.8	520.3	1,800.0	1,375.8
Commercial
Disaggregation of Revenue [Line Items]
Net sales	178.1	126.0	488.9	391.8
Industrial
Disaggregation of Revenue [Line Items]
Net sales	162.3	152.2	487.3	454.2
U.S.
Disaggregation of Revenue [Line Items]
Net sales	669.3	541.2	1,895.0	1,487.9
Western Europe
Disaggregation of Revenue [Line Items]
Net sales	115.1	92.6	351.1	281.3
Developing
Disaggregation of Revenue [Line Items]
Net sales	123.7	108.3	349.6	303.2
Other Developed
Disaggregation of Revenue [Line Items]
Net sales	$ 61.1	$ 56.4	$ 180.5	$ 149.4