Reportable Business Segments (Net Sales and Segment Profit (Loss) and Reconciliation to Income from Continuing Operations) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 843,600,000	$ 1,030,200,000	$ 1,175,400,000	$ 834,800,000	$ 891,800,000	$ 1,052,300,000	$ 1,102,100,000	$ 793,400,000	$ 3,883,900,000	$ 3,839,600,000	$ 3,641,600,000
Segment Profit (Loss)
Total segment profit									(540,600,000)	(514,600,000)	(469,600,000)
Reconciliation to Operating income:
Special inventory write down									200,000	0	0
Special product quality adjustments									0	5,400,000	(400,000)
Loss (gain), net on sale of businesses and related property									27,000,000	1,100,000	0
Gain from insurance recoveries, net of losses incurred									(10,900,000)	0	0
Pension settlement									400,000	0	31,400,000
Items in (Gains) Losses and other expenses, net that are excluded from segment profit (loss)									11,400,000	10,400,000	7,400,000
Restructuring charges									3,000,000	3,200,000	1,800,000
Operating income									509,500,000	494,500,000	429,400,000
Revenue from transactions with major customers									$ 0	$ 0	$ 0
Minimum percentage of consolidated net sales from single customer									10.00%	10.00%	10.00%
Residential Heating & Cooling [Member]
Segment Reporting Information [Line Items]
Net sales									$ 2,225,000,000	$ 2,140,400,000	$ 2,000,800,000
Segment Profit (Loss)
Total segment profit									(399,400,000)	(373,900,000)	(348,800,000)
Commercial Heating & Cooling [Member]
Segment Reporting Information [Line Items]
Net sales									1,043,500,000	973,800,000	917,900,000
Segment Profit (Loss)
Total segment profit									(159,500,000)	(157,300,000)	(149,300,000)
Refrigeration [Member]
Segment Reporting Information [Line Items]
Net sales									615,400,000	725,400,000	722,900,000
Segment Profit (Loss)
Total segment profit									(66,100,000)	(72,600,000)	(68,900,000)
Corporate & other [Member]
Segment Profit (Loss)
Total segment profit									$ (84,400,000)	$ (89,200,000)	$ (97,400,000)