Commitments and Contingencies - Employees (Details) - Unionized Employees Concentration Risk - Number of Employees, Total
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3 Months Ended |
|
Mar. 31, 2021
employee_group
|
|---|
| Concentration Risk [Line Items] |
|
| Number of union-represented employee groups |
5
|
| Company's employees covered under collective bargaining agreements (as a percent) |
82.00%
|
| Air Line Pilots Association, International ("ALPA") |
|
| Concentration Risk [Line Items] |
|
| Company's employees covered under collective bargaining agreements (as a percent) |
29.00%
|
| Association of Flight Attendants ("AFA-CWA") |
|
| Concentration Risk [Line Items] |
|
| Company's employees covered under collective bargaining agreements (as a percent) |
46.00%
|
| Professional Airline Flight Control Association ("PAFCA") |
|
| Concentration Risk [Line Items] |
|
| Company's employees covered under collective bargaining agreements (as a percent) |
1.00%
|
| International Association of Machinists and Aerospace Workers ("IAMAW") |
|
| Concentration Risk [Line Items] |
|
| Company's employees covered under collective bargaining agreements (as a percent) |
3.00%
|
| Transport Workers Union of America ("TWU") |
|
| Concentration Risk [Line Items] |
|
| Company's employees covered under collective bargaining agreements (as a percent) |
3.00%
|