Reportable Business Segments (Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net sales
Net sales	$ 1,052.3	$ 1,010.0	$ 2,947.9	$ 2,744.4
Segment profit (loss)
Total segment profit	161.0	157.2	408.6	365.0
Reconciliation to Operating income:
Special product quality adjustments	0.5	0.0	5.7	(0.4)
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	4.0	(0.3)	10.0	2.9
Restructuring charges	1.9	0.6	2.1	1.2
Operating income	154.6	156.9	390.8	361.3
Residential Heating & Cooling [Member]
Net sales
Net sales	590.5	572.7	1,663.8	1,524.5
Segment profit (loss)
Total segment profit	114.7	112.7	297.6	266.9
Commercial Heating & Cooling [Member]
Net sales
Net sales	269.4	251.4	723.5	674.7
Segment profit (loss)
Total segment profit	50.0	48.9	113.8	110.6
Refrigeration [Member]
Net sales
Net sales	192.4	185.9	560.6	545.2
Segment profit (loss)
Total segment profit	20.0	22.9	55.7	53.2
Corporate & Other [Member]
Segment profit (loss)
Total segment profit	$ 23.7	$ 27.3	$ 58.5	$ 65.7