Financial Derivative Instruments and Risk Management - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative, other current assets	$ 0	$ 1,000,000
Derivative, other current liabilities	0	1,000,000
Fuel Derivative Contracts
Derivative [Line Items]
Cost of swap	0
Interest Rate Swap
Derivative [Line Items]
Cost of swap	0	$ 4,000,000
Unrealized losses from cash flow hedges net of adjustment for dedesignation of fuel hedges, net of deferred tax benefit	$ 10,000,000
Minimum
Derivative [Line Items]
Interest rate risk, time period between agreements	7 years
Maximum
Derivative [Line Items]
Interest rate risk, time period between agreements	9 years