Financial Derivative Instruments and Risk Management (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Fuel Derivative Contracts
Derivative [Line Items]
Cost of swap	$ 0	$ 0	$ 0
Notional amount	0		0
Interest Rate Swap
Derivative [Line Items]
Cost of swap	0	$ 0
Notional amount	0		0
Unrealized losses from cash flow hedges net of adjustment for dedesignation of fuel hedges, net of deferred tax benefit	$ 10,000,000		$ 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