Commitments and Contingencies - Employees Under Collective Bargaining Agreements (Details)	Dec. 31, 2018 employee
Other Commitments [Line Items]
Entity number of employees	89,000
Delta Pilots - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	13,203
Delta Flight Superintendents (Dispatchers) - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	432
Endeavor Air Pilots - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	1,976
Endeavor Air Flight Attendants - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	1,307
Endeavor Air Dispatchers - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	60