Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.22.2
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Accounting Policies [Abstract]        
Contract cost, amortization period     1 year  
Fuel revenue and fuel costs included fuel taxes $ 243.7 $ 262.7 $ 475.5 $ 485.2