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Commitments and Contingencies Concentration Risk (Details) - Unionized Employees Concentration Risk	12 Months Ended
	Dec. 31, 2021
Flight Attendants
Concentration Risk [Line Items]
Concentration Risk, Percentage	24.40%
Pilots
Concentration Risk [Line Items]
Concentration Risk, Percentage	33.50%
Flight Dispatchers
Concentration Risk [Line Items]
Concentration Risk, Percentage	0.90%
Maintenance Technicians
Concentration Risk [Line Items]
Concentration Risk, Percentage	12.20%
Total Percentage of Employees
Concentration Risk [Line Items]
Concentration Risk, Percentage	71.00%

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Concentration Risk, Percentage

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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