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Commitments and Contingencies - Summary of Financial Information for the Impact of Environmental Reserves and Recoveries (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]        
Expense to unaudited condensed consolidated statements of operations $ 2.4 $ 3.1 $ 3.5 $ 3.3