Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	$ 1,175.4	$ 1,102.1	$ 2,010.2	$ 1,895.6
Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	716.0	653.5	1,169.7	1,073.3
Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	292.2	258.6	497.7	454.1
Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	165.4		339.0
Revenue, Net	167.2	$ 190.0	342.8	$ 368.2
UNITED STATES
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	1,095.7		1,838.3
UNITED STATES | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	716.0		1,169.7
UNITED STATES | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	252.1		431.2
UNITED STATES | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	127.6		237.4
Europe [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	69.1		122.2
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	40.1		66.5
Europe [Member] | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	29.0		55.7
Asia Pacific [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	10.6		49.7
Asia Pacific [Member] | Residential Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	0.0		0.0
Asia Pacific [Member] | Commercial Heating and Cooling [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	0.0		0.0
Asia Pacific [Member] | Refrigeration [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Net	10.6		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	546.7		886.3
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	169.3		283.4
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	279.3		457.2
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	$ 12.9		$ 40.5