Document and Entity Information [Abstract] Document Type Entity Registrant Name Entity Central Index Key Amendment Flag Represents the information relating to Scott Kirby. Scott Kirby [Member] Scott Kirby Represents the information relating to Oscar Munoz. Oscar Munoz [Member] Oscar Munoz This member presents the adjustment (deduction) for pension value from summary compensation table. Pension Adjustments Pension Value In Summary Compensation Table [Member] Minus Change in Accumulated Benefits Under Defined Benefit and Actuarial Pension Plans This member presents the net compensation adjustment for equity awards, which is comprised of equity awards value from summary compensation table, net of total equity awards adjustments. Total Net Adjustments For Equity Awards [Member] This member presents the adjustment (deduction) for equity awards value from summary compensation table. Equity Awards Value In Summary Compensation Table (Grant Date Value) Minus Grant Date Fair Value of Option and Stock Awards Granted in Fiscal Year This member presents the total equity awards adjustments, which may be comprised of adjustments for (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; (ii) the change in fair value from the end of the prior fiscal year of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; (iii) for awards granted in prior years that vest in the applicable year, the amount equal to the change in value as of the vesting date (from the end of the prior fiscal year); (iv) adjustments for equity awards that failed to meet performance conditions; and (v) dividends or other earnings paid on equity awards not otherwise reflected in fair value. Total Equity Awards Adjustments [Member] This member presents the equity awards adjustments on the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year. Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member] Plus Fair Value at Fiscal Year-End of Outstanding and Unvested Option and Stock Awards Granted in Fiscal Year This member presents the equity awards adjustments on the change in fair value from the end of the prior fiscal year of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year. Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member] Plus/(Minus) Change in Fair Value of Outstanding and Unvested Option and Stock Awards Granted in Prior Fiscal Years This member presents the equity awards adjustments on the change in fair value (as of vesting date) of awards vested during current year. Change In Fair Value As Of Vesting Date Of Awards Vested During Current Year [Member] This member presents the equity awards adjustments on the change in fair value (as of vesting date) of prior year awards vested during current year. Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] Plus/(Minus) Change in Fair Value as of Vesting Date of Option and Stock Awards Granted in Prior Years for which Applicable Vesting Conditions Were Satisfied During Fiscal Year This member presents the equity awards adjustments on the change in fair value (as of vesting date) of current year awards vested during current year. Change In Fair Value As Of Vesting Date Of Current Year Awards Vested During Current Year [Member] Plus Fair Value at Vesting of Option and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year