Reportable Business Segments (Equity Method Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total income from equity method investments	$ 18.4	$ 18.4	$ 13.4
Refrigeration [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	3.9	4.0	2.8
Residential [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	11.7	11.5	8.0
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total income from equity method investments	$ 2.8	$ 2.9	$ 2.6