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	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
American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from government assistance, payroll support program, CARES Act	12,786
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, PSP1 | American Airlines, Inc.
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, PSP2 | American Airlines, Inc.
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
Total PSP Financial Assistance, PSP3 | American Airlines, Inc.
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, PSP | American Airlines, Inc.
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, PSP1 | American Airlines, Inc.
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, PSP2 | American Airlines, Inc.
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
Grant, PSP3 | American Airlines, Inc.
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, PSP | American Airlines, Inc.
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, PSP1 | American Airlines, Inc.
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, PSP2 | American Airlines, Inc.
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
Promissory Notes, PSP3 | American Airlines, Inc.
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, PSP | American Airlines, Inc.
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, PSP1 | American Airlines, Inc.
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, PSP2 | American Airlines, Inc.
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
Warrants Issued, PSP3 | American Airlines, Inc.
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