Restructuring Charges (Restructuring Charges for Ongoing Activities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	$ 3.0
Incurred to Date	21.8
Total Expected to be Incurred	22.6	$ 22.6
Residential Heating and Cooling [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	0.6
Incurred to Date	2.0
Total Expected to be Incurred		2.0
Commercial Heating and Cooling [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	1.1
Incurred to Date	3.1
Total Expected to be Incurred		3.1
Refrigeration [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	1.3
Incurred to Date	14.4
Total Expected to be Incurred		15.2
Corporate and Other [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	0.0
Incurred to Date	2.3
Total Expected to be Incurred		$ 2.3
Severance and Related Expense [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	1.7
Incurred to Date	13.0
Total Expected to be Incurred	13.8
Asset Write-offs and Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	0.0
Incurred to Date	3.2
Total Expected to be Incurred	3.2
Lease Termination [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	0.7
Incurred to Date	0.9
Total Expected to be Incurred	0.9
Other [Member]
Restructuring Cost and Reserve [Line Items]
Incurred in 2018	0.6
Incurred to Date	4.7
Total Expected to be Incurred	$ 4.7