Goodwill and Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill
Beginning Balance	$ 195.1	$ 195.1
Other	(5.4)	0.0
Ending Balance	200.5	195.1	$ 195.1
Goodwill, accumulated impairment losses			21.2
Impairment	0.0	0.0	5.5
Residential Heating & Cooling [Member]
Goodwill
Beginning Balance	26.1	26.1
Other	0.0	0.0
Ending Balance	26.1	26.1	26.1
Commercial Heating & Cooling [Member]
Goodwill
Beginning Balance	60.1	60.6
Other	(2.1)	0.5
Ending Balance	62.2	60.1	60.6
Refrigeration [Member]
Goodwill
Beginning Balance	108.9	108.4
Other	(3.3)	(0.5)
Ending Balance	$ 112.2	$ 108.9	$ 108.4