Reportable Business Segments (Segment Data) (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023 USD ($)	Mar. 31, 2023 Segment	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) Segment	Jun. 30, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment		3		2
Net sales
Net sales	$ 1,411.4		$ 1,366.3	$ 2,460.7	$ 2,379.7
Segment profit (loss)
Total segment profit	283.1		229.8	424.8	344.4
Reconciliation to Operating income:
Items in Losses (gains) and other expenses, net that are excluded from segment profit (loss)	4.3		2.4	6.4	4.6
Restructuring charges	0.0		0.5	0.0	1.0
Operating income	278.8		226.9	418.4	338.8
Residential
Net sales
Net sales	936.2		977.5	1,617.2	1,659.6
Segment profit (loss)
Total segment profit	202.6		216.3	313.7	324.0
Commercial
Net sales
Net sales	407.5		327.4	716.1	606.9
Segment profit (loss)
Total segment profit	103.0		41.2	153.0	64.9
Refrigeration
Net sales
Net sales				127.4	113.2
Corporate and Other
Net sales
Net sales	67.7		61.4	127.4	113.2
Segment profit (loss)
Total segment profit	$ (22.5)		$ (27.7)	$ (41.9)	$ (44.5)