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, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 914,000,000.0	$ 1,055,000,000.0	$ 941,300,000	$ 723,800,000	$ 885,000,000.0	$ 1,032,900,000	$ 1,099,100,000	$ 790,300,000	$ 3,634,100,000	$ 3,807,200,000	$ 3,883,900,000
Segment Profit (Loss)
Total segment profit									(506,700,000)	(608,900,000)	(540,600,000)
Reconciliation to Operating income:
Special Product Quality Adjustment									0	0	200,000
Gain (Loss) on Disposition of Business and Related Property									0	10,600,000	27,000,000.0
Insurance recoveries received for property damage incurred from natural disaster									0	(79,600,000)	(10,900,000)
Items in (Gains) Losses and other expenses, net that are excluded from segment profit (loss)									13,300,000	11,300,000	11,400,000
Restructuring charges									10,800,000	10,300,000	3,000,000.0
One time inventory write down									(1,000,000.0)	600,000	0
Operating income									478,500,000	$ 656,900,000	$ 509,900,000
Revenue from transactions with major customers									$ 0
Minimum percentage of consolidated net sales from single customer									10.00%	10.00%	10.00%
Loss(gain) from natural disaster, net of Insurance recoveries									$ 3,100,000	$ (178,800,000)	$ (38,300,000)
Residential Heating & Cooling [Member]
Segment Reporting Information [Line Items]
Revenues									2,361,500,000	2,291,100,000	2,225,000,000.0
Segment Profit (Loss)
Total segment profit									(428,500,000)	(464,600,000)	(399,400,000)
Commercial Heating & Cooling [Member]
Segment Reporting Information [Line Items]
Revenues									800,900,000	947,400,000	900,700,000
Segment Profit (Loss)
Total segment profit									(136,900,000)	(165,400,000)	(157,500,000)
Refrigeration [Member]
Segment Reporting Information [Line Items]
Revenues									471,700,000	568,700,000	758,200,000
Segment Profit (Loss)
Total segment profit									(32,800,000)	(61,300,000)	(68,100,000)
Corporate & other [Member]
Segment Profit (Loss)
Total segment profit									$ (91,500,000)	$ (82,400,000)	$ (84,400,000)