Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
Goodwill
Beginning Balance	$ 186.5
Goodwill, Foreign Currency Translation Gain (Loss)		$ (0.1)
Other	(0.4)	0.0
Ending Balance	186.9	186.6
Goodwill, accumulated impairment losses		32.7
Impairment		$ 11.5
Residential Heating & Cooling [Member]
Goodwill
Beginning Balance	26.1
Goodwill, Change in Goodwill Allocation, Description		—
Goodwill, Foreign Currency Translation Gain (Loss)	0.0	$ 0.0
Ending Balance	26.1	$ 26.1
Commercial Heating & Cooling [Member]
Goodwill
Beginning Balance	61.1
Goodwill, Change in Goodwill Allocation, Description		(0.3)
Goodwill, Foreign Currency Translation Gain (Loss)	0.0	$ 0.0
Ending Balance	61.1	$ 61.4
Refrigeration [Member]
Goodwill
Beginning Balance	99.3
Goodwill, Change in Goodwill Allocation, Description		0.3
Goodwill, Foreign Currency Translation Gain (Loss)	0.4	$ (0.1)
Ending Balance	$ 99.7	$ 99.1