Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill
Beginning Balance	$ 186.6	$ 200.5
Goodwill, Transfers	0.0	(11.5)
Other	0.1	2.4
Ending Balance	186.5	186.6
Goodwill, accumulated impairment losses			$ 21.2
Residential Heating & Cooling [Member]
Goodwill
Beginning Balance	26.1	26.1
Goodwill, Transfers	0.0
Other	0.0	0.0
Ending Balance	26.1	26.1
Commercial Heating & Cooling [Member]
Goodwill
Beginning Balance	61.4	62.2
Goodwill, Transfers	0.3
Other	0.0	0.8
Ending Balance	61.1	61.4
Refrigeration [Member]
Goodwill
Beginning Balance	99.1	112.2
Goodwill, Transfers	(0.3)	(11.5)
Other	0.1	1.6
Ending Balance	$ 99.3	$ 99.1