Commitments and Contingencies - Employees Under Collective Bargaining Agreements (Details)	Dec. 31, 2020 employee
Other Commitments [Line Items]
Approximate number of active employees	74,000
Delta Pilots - Represented by Unions
Other Commitments [Line Items]
Approximate number of active employees	12,940
Delta Flight Superintendents (Dispatchers) - Represented by Unions
Other Commitments [Line Items]
Approximate number of active employees	350
Endeavor Air Pilots - Represented by Unions
Other Commitments [Line Items]
Approximate number of active employees	1,900
Endeavor Air Flight Attendants - Represented by Unions
Other Commitments [Line Items]
Approximate number of active employees	1,480