Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Payroll Support Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	24 Months Ended
	Dec. 31, 2021	Dec. 31, 2023	Apr. 23, 2021	Jan. 15, 2021	Apr. 20, 2020
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	$ 12,786
Notes Payable, Other Payables | Payroll Support Program Promissory Notes
Unusual or Infrequent Item, or Both [Line Items]
Aggregate principal issued		$ 3,700
Total PSP Financial Assistance, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	5,958
Total PSP Financial Assistance, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	3,533
Total PSP Financial Assistance, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	3,295
Grant, PSP
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	8,855
Grant, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	4,138
Grant, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	2,427
Grant, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	2,290
Promissory Notes, PSP
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	3,746
Promissory Notes, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	1,757
Promissory Notes, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	1,030
Promissory Notes, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	959
Warrants Issued, PSP
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	$ 185
Warrants, number of warrant shares of common stock	25,000
Warrants Issued, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	$ 63
Warrants, number of warrant shares of common stock					14,000
Exercise price of warrants (in dollars per share)					$ 12.51
Warrants Issued, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	76
Warrants, number of warrant shares of common stock				6,600
Exercise price of warrants (in dollars per share)				$ 15.66
Warrants Issued, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	46
Warrants, number of warrant shares of common stock			4,400
Exercise price of warrants (in dollars per share)			$ 21.75
American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	12,786
American Airlines, Inc. | Total PSP Financial Assistance, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	5,958
American Airlines, Inc. | Total PSP Financial Assistance, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	3,533
American Airlines, Inc. | Total PSP Financial Assistance, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	3,295
American Airlines, Inc. | Grant, PSP
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	8,855
American Airlines, Inc. | Grant, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	4,138
American Airlines, Inc. | Grant, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	2,427
American Airlines, Inc. | Grant, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	2,290
American Airlines, Inc. | Promissory Notes, PSP
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	3,746
American Airlines, Inc. | Promissory Notes, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	1,757
American Airlines, Inc. | Promissory Notes, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	1,030
American Airlines, Inc. | Promissory Notes, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	959
American Airlines, Inc. | Warrants Issued, PSP
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	$ 185
Warrants, number of warrant shares of common stock	25,000
American Airlines, Inc. | Warrants Issued, PSP1
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	$ 63
Warrants, number of warrant shares of common stock					14,000
Exercise price of warrants (in dollars per share)					$ 12.51
American Airlines, Inc. | Warrants Issued, PSP2
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	76
Warrants, number of warrant shares of common stock				6,600
Exercise price of warrants (in dollars per share)				$ 15.66
American Airlines, Inc. | Warrants Issued, PSP3
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	$ 46
Warrants, number of warrant shares of common stock			4,400
Exercise price of warrants (in dollars per share)			$ 21.75