Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Environmental remediation liabilities - discounted	$ 38.7	$ 39.2
Accrual for environmental loss contingencies - weighted-average discount rate	3.50%
Environmental remediation liabilities - undiscounted	$ 72.3	73.6
Minimum
Loss Contingencies [Line Items]
Potential revision on future environmental remediation costs before tax	10.0
Maximum
Loss Contingencies [Line Items]
Potential revision on future environmental remediation costs before tax	37.0
Other noncurrent liabilities
Loss Contingencies [Line Items]
Tax Indemnification Liability	$ 28.3	$ 30.5