Revenue - Geographic Net Sales Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 798.5	$ 713.6	$ 2,221.8	$ 2,202.0
Residential
Disaggregation of Revenue [Line Items]
Net sales	520.3	395.5	1,375.8	1,230.1
Commercial
Disaggregation of Revenue [Line Items]
Net sales	126.0	154.3	391.8	475.7
Industrial
Disaggregation of Revenue [Line Items]
Net sales	152.2	163.8	454.2	496.2
UNITED STATES
Disaggregation of Revenue [Line Items]
Net sales	541.2	445.0	1,487.9	1,382.1
Western Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	92.6	97.8	281.3	309.0
Developing
Disaggregation of Revenue [Line Items]
Net sales	108.3	119.9	303.2	357.8
Other Developed
Disaggregation of Revenue [Line Items]
Net sales	$ 56.4	$ 50.9	$ 149.4	$ 153.1