Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	$ 1,030.2	$ 1,052.3	$ 3,040.4	$ 2,947.9
Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	594.7	590.5	1,764.4	1,663.8
Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	275.8	269.4	773.5	723.5
Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	156.8		495.8
Revenue, Net	159.7	$ 192.4	502.5	$ 560.6
UNITED STATES
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	963.6		2,801.9
UNITED STATES | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	594.7		1,764.4
UNITED STATES | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	236.9		668.1
UNITED STATES | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	132.0		369.4
Europe [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	66.6		188.8
Europe [Member] | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	0.0		0.0
Europe [Member] | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	38.9		105.4
Europe [Member] | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	27.7		83.4
Asia Pacific [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net			49.7
Asia Pacific [Member] | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net			0.0
Asia Pacific [Member] | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net			0.0
Asia Pacific [Member] | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net			49.7
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	459.9		1,346.2
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	134.8		418.2
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	242.6		679.2
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	$ 33.2		$ 94.3