Reportable Business Segments (Geographic Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 4,981.9	$ 4,718.4	$ 4,194.1
Total property, plant and equipment, net	720.4	548.9	515.1
United States [Member]
Segment Reporting Information [Line Items]
Revenues	4,416.9	4,180.5	3,646.5
Total property, plant and equipment, net	487.1	408.8	381.0
Mexico [Member]
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	228.7	110.9	102.7
Canada [Member]
Segment Reporting Information [Line Items]
Revenues	317.4	303.6	316.3
Total property, plant and equipment, net	2.2	2.1	2.1
International [Member]
Segment Reporting Information [Line Items]
Revenues	247.6	234.3	231.3
Total property, plant and equipment, net	2.4	27.1	29.3
Residential Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Revenues	3,222.9	3,198.3	2,775.6
Residential Heating and Cooling [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenues	3,001.3	2,957.1	2,532.4
Residential Heating and Cooling [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Revenues	221.6	241.2	243.2
Residential Heating and Cooling [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenues	0.0	0.0	0.0
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Revenues	1,511.4	1,286.4	1,188.8
Commercial Heating and Cooling [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenues	1,415.6	1,223.4	1,114.1
Commercial Heating and Cooling [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Revenues	95.8	62.4	73.1
Commercial Heating and Cooling [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenues	0.0	0.6	1.6
Refrigeration [Member]
Segment Reporting Information [Line Items]
Revenues	247.6	233.7	229.7
Refrigeration [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenues	0.0	0.0	0.0
Refrigeration [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Revenues	0.0	0.0	0.0
Refrigeration [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenues	$ 247.6	$ 233.7	$ 229.7