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, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 885,000,000.0	$ 1,032,900,000	$ 1,099,100,000	$ 790,300,000	$ 843,600,000	$ 1,030,200,000	$ 1,175,400,000	$ 834,800,000	$ 3,807,200,000	$ 3,883,900,000	$ 3,839,600,000
Segment Profit (Loss)
Total segment profit									(608,900,000)	(540,600,000)	(514,600,000)
Reconciliation to Operating income:
Special inventory write down									(600,000)	0	5,400,000
Gain (Loss) on Disposition of Business and Related Property									10,600,000	27,000,000.0	1,100,000
Insurance recoveries received for property damage incurred from natural disaster									(79,600,000)	(10,900,000)	0
Items in (Gains) Losses and other expenses, net that are excluded from segment profit (loss)									11,300,000	11,400,000	10,400,000
Restructuring charges									10,300,000	3,000,000.0	3,200,000
One time inventory write down									0	200,000	0
Operating income									656,900,000	509,900,000	494,500,000
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]
Revenues									$ 2,291,100,000	$ 2,225,000,000.0	$ 2,140,400,000
Segment Profit (Loss)
Total segment profit									(464,600,000)	(399,400,000)	(373,900,000)
Commercial Heating & Cooling [Member]
Segment Reporting Information [Line Items]
Revenues									947,400,000	900,700,000	819,500,000
Segment Profit (Loss)
Total segment profit									(165,400,000)	(157,500,000)	(149,300,000)
Refrigeration [Member]
Segment Reporting Information [Line Items]
Revenues									568,700,000	758,200,000	879,700,000
Segment Profit (Loss)
Total segment profit									(61,300,000)	(68,100,000)	(80,600,000)
Corporate & other [Member]
Segment Profit (Loss)
Total segment profit									$ (82,400,000)	$ (84,400,000)	$ (89,200,000)