Reportable Business Segments (Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net sales
Net sales	$ 1,010.0	$ 955.0	$ 2,744.4	$ 2,633.3
Segment profit (loss)
Total segment profit	157.2	131.2	365.0	296.9
Reconciliation to Operating income:
Special product quality adjustments	0.0	(0.7)	(0.4)	(0.6)
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	(0.3)	(3.9)	(2.9)	(10.8)
Restructuring charges (gains)	0.6	(0.4)	1.2	1.8
Operating income	156.9	127.0	361.3	284.9
Residential Heating & Cooling [Member]
Net sales
Net sales	572.7	517.9	1,524.5	1,435.6
Segment profit (loss)
Total segment profit	112.7	90.1	266.9	221.3
Commercial Heating & Cooling [Member]
Net sales
Net sales	251.4	246.8	674.7	660.3
Segment profit (loss)
Total segment profit	48.9	44.8	110.6	95.5
Refrigeration [Member]
Net sales
Net sales	185.9	190.3	545.2	537.4
Segment profit (loss)
Total segment profit	22.9	20.3	53.2	37.5
Corporate & Other [Member]
Segment profit (loss)
Total segment profit	$ 27.3	$ 24.0	$ 65.7	$ 57.4