Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.21.1
Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]    
Environmental obligations $ 13.3 $ 13.5
Estimated amount recoverable 5.4 5.6
Asset retirement obligation $ 53.6 $ 53.2