Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	$ 790.3	$ 834.8
Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	465.6	453.7
Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	173.3	179.1
Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	148.9	200.0
Revenue, Net	151.4	202.0
UNITED STATES
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	682.1	681.5
UNITED STATES | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	433.2	423.5
UNITED STATES | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	157.3	162.3
UNITED STATES | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	91.6	95.7
CANADA
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	49.0	47.8
CANADA | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	32.4	30.2
CANADA | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	15.9	16.7
CANADA | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	0.7	0.9
International
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	59.2	105.5
International | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	0.0	0.0
International | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	0.1	0.1
International | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	59.1	105.4
Sales Channel, Directly to Consumer [Member] | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	334.7	339.5
Sales Channel, Through Intermediary [Member] | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	130.9	114.2
Equipment Sales [Member] | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	143.5	151.5
Commercial Heating and Cooling [Member] | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 29.8	$ 27.6