Reportable Business Segments (Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net sales
Net sales	$ 1,030.2	$ 1,052.3	$ 3,040.4	$ 2,947.9
Segment profit (loss)
Total segment profit	154.6	161.0	430.8	408.6
Reconciliation to Operating income:
Special inventory write down	0.0	0.0	0.2	0.0
Special inventory write down	0.0	0.5	0.0	5.7
Loss (gain), net on sale of businesses and related property	6.2	0.0	25.8	0.0
Loss on assets held for sale				0.0
Loss (gain) from natural disaster, net of Insurance recoveries	0.3	0.0	0.3	0.0
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	2.4	4.0	9.3	10.0
Restructuring charges	0.5	1.9	1.9	2.1
Operating income	145.2	154.6	393.3	390.8
Residential Heating & Cooling [Member]
Net sales
Net sales	594.7	590.5	1,764.4	1,663.8
Segment profit (loss)
Total segment profit	113.0	114.7	317.9	297.6
Commercial Heating & Cooling [Member]
Net sales
Net sales	275.8	269.4	773.5	723.5
Segment profit (loss)
Total segment profit	46.7	50.0	118.9	113.8
Refrigeration [Member]
Net sales
Net sales	159.7	192.4	502.5	560.6
Segment profit (loss)
Total segment profit	23.0	20.0	55.8	55.7
Corporate & Other [Member]
Segment profit (loss)
Total segment profit	28.1	$ 23.7	61.8	$ 58.5
UNITED STATES
Net sales
Net sales	963.6		2,801.9
UNITED STATES | Residential Heating & Cooling [Member]
Net sales
Net sales	594.7		1,764.4
UNITED STATES | Commercial Heating & Cooling [Member]
Net sales
Net sales	236.9		668.1
UNITED STATES | Refrigeration [Member]
Net sales
Net sales	$ 132.0		$ 369.4