Reportable Business Segments (Equity Method Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total income from equity method investments	$ 12.0	$ 18.4	$ 18.4
Refrigeration [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	2.1	3.9	4.0
Residential [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	8.5	11.7	11.5
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	$ 1.4	$ 2.8	$ 2.9