Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended			24 Months Ended
	Sep. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) component reporting_unit $ / shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Oct. 21, 2020 USD ($)	Sep. 25, 2020 USD ($)
Unusual or Infrequent Item, or Both [Line Items]
Common stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Proceeds from government assistance, payroll support program, CARES Act					$ 12,786
Consolidated reporting unit | reporting_unit		1
Goodwill impairment		$ 0
Goodwill		4,091	$ 4,091
Amortization expense		7	41	$ 41
Impairment of intangible assets, indefinite-lived (excluding goodwill)		0
Indefinite lived intangible assets		1,900	1,900
Advertising expense		114	105	105
Foreign currency gains (losses)		$ (30)	$ (38)	(4)
Account Receivable from Business Partners
Unusual or Infrequent Item, or Both [Line Items]
Contract receivables settlement duration		30 days
Account Receivable from Ticket Sales
Unusual or Infrequent Item, or Both [Line Items]
Contract receivables settlement duration		7 days
Line of Credit | Treasury Term Loan Facility
Unusual or Infrequent Item, or Both [Line Items]
Warrants, number of warrant shares of common stock | shares	4,400,000
Exercise price of warrants (in dollars per share) | $ / shares	$ 12.51
American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Common stock, par value (in dollars per share) | $ / shares		$ 1.00	$ 1.00
Proceeds from government assistance, payroll support program, CARES Act					$ 12,786
Consolidated reporting unit | reporting_unit		1
Goodwill impairment		$ 0
Goodwill		4,091	$ 4,091
Amortization expense		7	41	41
Impairment of intangible assets, indefinite-lived (excluding goodwill)		0
Indefinite lived intangible assets		1,900	1,900
Advertising expense		114	105	105
Foreign currency gains (losses)		$ (30)	$ (38)	$ (4)
American Airlines, Inc. | Line of Credit | Treasury Term Loan Facility
Unusual or Infrequent Item, or Both [Line Items]
Line of credit facility, maximum borrowing capacity						$ 7,500	$ 5,500
Proceeds from lines of credit	$ 550
Air traffic liability
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Contract term		12
Recognition of revenue		$ 5,300
Air traffic liability | American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Payment term		12 months
Recognition of revenue		$ 5,300
Loyalty program liability
Unusual or Infrequent Item, or Both [Line Items]
Payment term		30 days
Number of revenue components | component		2
Recognition of revenue		$ 3,628
Loyalty program liability | American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Payment term		30 days
Number of revenue components | component		2
Recognition of revenue		$ 3,628
Loyalty program liability | Minimum
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Loyalty program liability | Minimum | American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Loyalty program liability | Maximum
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		6 years
Loyalty program liability | Maximum | American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		6 years