Commitments and Contingencies - Employee Under Collective Bargaining Agreements (Details)	Dec. 31, 2017 employee
Other Commitments [Line Items]
Entity number of employees	87,000
Delta Pilots - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	13,234
Delta Flight Superintendents (Dispatchers) - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	420
Endeavor Air Pilots - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	1,805
Endeavor Air Flight Attendants - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	1,160
Endeavor Air Dispatchers - Represented by Unions
Other Commitments [Line Items]
Entity number of employees	55