Reportable Business Segments (Segment Data) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Segment	Jun. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment			3
Net sales
Net sales	$ 1,366,300,000	$ 1,239,000,000	$ 2,379,700,000	$ 2,169,400,000
Segment profit (loss)
Total segment profit	229,800,000	221,600,000	344,400,000	337,200,000
Reconciliation to Operating income:
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	2,400,000	4,400,000	4,600,000	5,900,000
Restructuring charges	500,000	1,200,000	1,000,000.0	1,300,000
Operating income	226,900,000	216,000,000.0	338,800,000	330,000,000.0
Residential Heating & Cooling [Member]
Net sales
Net sales	977,500,000	838,000,000.0	1,659,600,000	1,444,200,000
Segment profit (loss)
Total segment profit	216,300,000	189,700,000	324,000,000.0	286,100,000
Residential Heating & Cooling [Member] | Sales Channel, Directly to Consumer [Member]
Reconciliation to Operating income:
Revenue from Contract with Customer, Excluding Assessed Tax	0.70	0.76	0.69	0.72
Commercial Heating & Cooling
Net sales
Net sales	219,600,000	252,800,000	407,300,000	452,000,000.0
Segment profit (loss)
Total segment profit	17,200,000	45,300,000	23,500,000	72,600,000
Commercial Heating & Cooling | Equipment Sales
Reconciliation to Operating income:
Revenue from Contract with Customer, Excluding Assessed Tax	0.81	0.85	0.81	0.84
Refrigeration [Member]
Net sales
Net sales	169,200,000	148,200,000	312,800,000	273,200,000
Segment profit (loss)
Total segment profit	23,400,000	13,500,000	37,500,000	21,400,000
Corporate & Other [Member]
Segment profit (loss)
Total segment profit	$ 27,100,000	$ 26,900,000	$ 40,600,000	$ 42,900,000