Reportable Business Segments (Key Financial Information by Segment) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net Sales	$ 5,341,300,000	$ 4,981,900,000	$ 4,718,400,000
Cost of Goods Sold	3,569,400,000	3,434,100,000	3,433,700,000
Selling, general and administrative	730,600,000	705,500,000	627,200,000
Other (income) expense	5,000,000.0	(14,800,000)	(8,300,000)
Segment profit (loss)	1,036,300,000	$ 857,100,000	$ 665,800,000
Revenue from transactions with major customers	$ 0
Minimum percentage of consolidated net sales from single customer	10.00%	10.00%	10.00%
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting Information [Line Items]
Net Sales	$ 0	$ 247,600,000	$ 233,700,000
Cost of Goods Sold	700,000	178,900,000	183,000,000.0
Selling, general and administrative	107,000,000.0	157,800,000	144,200,000
Other (income) expense	12,700,000	4,800,000	500,000
Segment profit (loss)	(120,300,000)	(93,900,000)	(94,000,000.0)
Residential Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Net Sales	3,577,100,000	3,222,900,000	3,198,300,000
Residential Heating and Cooling [Member] | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	3,577,100,000	3,222,900,000	3,198,300,000
Cost of Goods Sold	2,426,200,000	2,277,300,000	2,302,200,000
Selling, general and administrative	393,800,000	350,200,000	303,300,000
Other (income) expense	(2,500,000)	(14,800,000)	(4,100,000)
Segment profit (loss)	759,700,000	610,200,000	596,900,000
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Net Sales	1,764,200,000	1,511,400,000	1,286,400,000
Commercial Heating and Cooling [Member] | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	1,764,200,000	1,511,400,000	1,286,400,000
Cost of Goods Sold	1,142,500,000	977,900,000	948,500,000
Selling, general and administrative	229,900,000	197,500,000	179,700,000
Other (income) expense	(5,200,000)	(4,800,000)	(4,700,000)
Segment profit (loss)	$ 396,900,000	$ 340,800,000	$ 162,900,000