Revenue - Geographic Net Sales Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 799.5	$ 780.6	$ 1,488.4	$ 1,513.2
Residential
Disaggregation of Revenue [Line Items]
Net sales	451.0	437.5	834.6	849.7
Commercial
Disaggregation of Revenue [Line Items]
Net sales	170.7	167.8	321.4	319.6
Industrial
Disaggregation of Revenue [Line Items]
Net sales	177.8	175.3	332.4	343.9
U.S.
Disaggregation of Revenue [Line Items]
Net sales	511.1	504.2	937.1	956.6
Western Europe
Disaggregation of Revenue [Line Items]
Net sales	106.9	103.8	211.2	214.1
Developing
Disaggregation of Revenue [Line Items]
Net sales	129.0	115.4	237.9	228.4
Other Developed
Disaggregation of Revenue [Line Items]
Net sales	$ 52.5	$ 57.2	$ 102.2	$ 114.1