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Commitments and Contingencies - Employee Under Collective Bargaining Agreements (Details)
12 Months Ended
Dec. 31, 2014
employee
Delta Pilots  
Entity number of employees 11,530dei_EntityNumberOfEmployees
/ dal_EmployeegroupsAxis
= dal_DeltaPilotsMember
Union ALPA
Date on which Collective Bargaining Agreement Becomes Amendable Dec. 31, 2015
Delta Flight Superintendents (Dispatchers)  
Entity number of employees 380dei_EntityNumberOfEmployees
/ dal_EmployeegroupsAxis
= dal_DeltaFlightSuperintendentsDispatchersMember
Union PAFCA
Date on which Collective Bargaining Agreement Becomes Amendable Mar. 31, 2018
Endeavor Air Pilots  
Entity number of employees 1,300dei_EntityNumberOfEmployees
/ dal_EmployeegroupsAxis
= dal_EndeavorPilotsMember
Union ALPA
Date on which Collective Bargaining Agreement Becomes Amendable Jan. 01, 2020
Endeavor Air Flight Attendants  
Entity number of employees 1,000dei_EntityNumberOfEmployees
/ dal_EmployeegroupsAxis
= dal_EndeavorFlightAttendantsMember
Union AFA
Date on which Collective Bargaining Agreement Becomes Amendable Dec. 31, 2018
Endeavor Air Dispatchers  
Entity number of employees 60dei_EntityNumberOfEmployees
/ dal_EmployeegroupsAxis
= dal_EndeavorAirDispatchersMember
Union DISTWU
Date on which Collective Bargaining Agreement Becomes Amendable Dec. 31, 2018