Revenue - Geographic Net Sales Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 713.3	$ 799.5	$ 1,423.3	$ 1,488.4
Residential
Disaggregation of Revenue [Line Items]
Net sales	439.7	451.0	855.5	834.6
Commercial
Disaggregation of Revenue [Line Items]
Net sales	124.4	170.7	265.8	321.4
Industrial
Disaggregation of Revenue [Line Items]
Net sales	149.2	177.8	302.0	332.4
U.S.
Disaggregation of Revenue [Line Items]
Net sales	482.7	511.1	946.7	937.1
Western Europe
Disaggregation of Revenue [Line Items]
Net sales	84.9	106.9	188.7	211.2
Developing
Disaggregation of Revenue [Line Items]
Net sales	100.4	129.0	194.9	237.9
Other Developed
Disaggregation of Revenue [Line Items]
Net sales	$ 45.3	$ 52.5	$ 93.0	$ 102.2