Reportable Business Segments (Geographic Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 4,194.1	$ 3,634.1	$ 3,807.2
Total property, plant and equipment, net	515.1	464.3	445.4
United States [Member]
Segment Reporting Information [Line Items]
Revenues	3,646.5	3,160.8	3,304.6
Total property, plant and equipment, net	381.0	352.9	333.6
Mexico [Member]
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	102.7	79.2	82.0
Canada [Member]
Segment Reporting Information [Line Items]
Revenues	316.3	257.3	254.7
Total property, plant and equipment, net	2.1	2.2	2.2
International [Member]
Segment Reporting Information [Line Items]
Revenues	231.3	216.0	247.9
Total property, plant and equipment, net	29.3	30.0	27.6
Residential Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Revenues	2,775.6	2,361.5	2,291.1
Residential Heating and Cooling [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenues	2,532.4	2,181.8	2,135.6
Residential Heating and Cooling [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Revenues	243.2	179.7	155.5
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	864.8	800.9	947.4
Commercial Heating and Cooling [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenues	790.1	721.1	847.1
Commercial Heating and Cooling [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Revenues	73.1	77.6	98.5
Commercial Heating and Cooling [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenues	1.6	2.2	1.8
Refrigeration [Member]
Segment Reporting Information [Line Items]
Revenues	553.7	471.7	568.7
Refrigeration [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenues	324.0	257.9	321.9
Refrigeration [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Revenues	0.0	0.0	0.7
Refrigeration [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenues	$ 229.7	$ 213.8	$ 246.1