Reportable Business Segments (Segment Data) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment			2
Net sales
Net sales	$ 1,498,100,000	$ 1,366,300,000	$ 3,996,300,000	$ 3,827,100,000
Segment profit (loss)
Total segment profit	303,300,000	255,300,000	788,600,000	680,300,000
Gain on sale from previous dispositions	0	63,200,000	0	63,200,000
Reconciliation to Operating income:
Gain on sale from previous dispositions	0	0	(1,600,000)	0
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	0	5,000,000.0	0	12,100,000
Operating income	303,300,000	186,800,000	790,200,000	604,800,000
Home Comfort Solutions
Net sales
Net sales	1,032,800,000	896,300,000	2,689,700,000	2,513,600,000
Segment profit (loss)
Total segment profit	226,500,000	181,400,000	567,100,000	495,200,000
Building Climate Solutions
Net sales
Net sales	465,300,000	405,500,000	1,306,600,000	1,121,500,000
Segment profit (loss)
Total segment profit	105,900,000	97,300,000	298,100,000	250,300,000
Corporate and Other
Net sales
Net sales	0	64,500,000	0	192,000,000.0
Segment profit (loss)
Total segment profit	$ (29,100,000)	$ (23,400,000)	$ (76,600,000)	$ (65,200,000)