Reportable Business Segments (Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net sales
Net sales	$ 1,019.2	$ 992.5	$ 1,734.4	$ 1,678.3
Segment profit (loss)
Total segment profit	161.1	134.2	207.7	165.4
Reconciliation to Income from continuing operations before income taxes:
Special product quality adjustments	0.0	(1.1)	(0.4)	(1.4)
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	(0.4)	2.6	3.1	6.7
Restructuring charges	0.8	1.8	0.6	2.1
Operating income	160.7	130.9	204.4	158.0
Residential Heating & Cooling [Member]
Net sales
Net sales	574.5	555.1	951.8	917.7
Segment profit (loss)
Total segment profit	115.9	99.9	154.1	131.2
Commercial Heating & Cooling [Member]
Net sales
Net sales	252.9	253.6	423.3	413.5
Segment profit (loss)
Total segment profit	47.4	43.0	61.7	50.7
Refrigeration [Member]
Net sales
Net sales	191.8	183.8	359.3	347.1
Segment profit (loss)
Total segment profit	21.3	13.3	30.3	17.2
Corporate & Other [Member]
Segment profit (loss)
Total segment profit	$ (23.5)	$ (22.0)	$ (38.4)	$ (33.7)