Reportable Business Segments (Equity Method Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total income from equity method investments	$ 13.4	$ 12.0	$ 18.4
Refrigeration [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	2.9	2.1	3.9
Residential [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	8.8	8.5	11.7
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	$ 1.7	$ 1.4	$ 2.8