Reportable Business Segments (Segment Data) (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 Segment
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment			2		3
Net sales
Net sales	$ 1,366.3	$ 1,244.9	$ 3,827.1	$ 3,624.6
Segment profit (loss)
Total segment profit	255.3	189.3	680.3	533.7
Reconciliation to Operating income:
Impairment on assets held for sale	63.2	0.0	63.2	0.0
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	5.0	3.3	12.1	7.9
Restructuring charges	0.3	0.2	0.2	1.2
Operating income	186.8	185.8	604.8	524.6
Residential
Net sales
Net sales	896.3	835.3	2,513.6	2,494.9
Segment profit (loss)
Total segment profit	181.4	153.8	495.2	477.7
Commercial
Net sales
Net sales	405.5	352.3	1,121.5	959.2
Segment profit (loss)
Total segment profit	97.3	52.4	250.3	117.4
Corporate and Other
Net sales
Net sales	64.5	57.3	192.0	170.5
Segment profit (loss)
Total segment profit	$ (23.4)	$ (16.9)	$ (65.2)	$ (61.4)