Commitments and Contingencies Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended					25 Months Ended
	Jun. 30, 2019	Dec. 31, 2016	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2021
Loss Contingencies [Line Items]
Restructuring charges				$ 24.1	$ 32.0	$ 12.0
Mass withdrawl liability	$ 22.9
Settlement of multi-employer pension plan				6.0	10.0
Total environmental liabilities				$ 7.6	8.0
Withdrawal from Multiemployer Defined Benefit Plan
Loss Contingencies [Line Items]
Restructuring charges	$ 22.9	$ 12.5
Forecast
Loss Contingencies [Line Items]
Settlement of multi-employer pension plan			$ 5.0					$ 21.0
Adjustment | Withdrawal from Multiemployer Defined Benefit Plan
Loss Contingencies [Line Items]
Restructuring charges					$ 8.5		$ 12.5