Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares	Dec. 31, 2024 USD ($) component reporting_unit $ / shares	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($)
Unusual or Infrequent Item, or Both [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01
Consolidated reporting unit | reporting_unit		1
Goodwill impairment		$ 0
Goodwill	$ 4,091	4,091	$ 4,091
Definite-lived intangible assets, net	101	101	108
Expected amortization expense in 2025	6	6
Expected amortization expense in 2026	6	6
Expected amortization expense in 2027	6	6
Expected amortization expense in 2028	6	6
Expected amortization expense in 2029	6	6
Expected amortization expense in 2030 and thereafter	70	70
Impairment of intangible assets, indefinite-lived (excluding goodwill)		0
Indefinite lived intangible assets	1,900	1,900	1,900
Interest expense		1,934	2,145	$ 1,962
Advertising expense		143	114	105
Foreign currency losses		48	$ 30	38
Fuel Financing Arrangement
Unusual or Infrequent Item, or Both [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,000	1,000
Basis spread on variable rate	3.75%
Fuel financing payable	$ 74	$ 74
Marketing Agreements
Unusual or Infrequent Item, or Both [Line Items]
Useful life of intangible assets	30 years	30 years
Domestic airport slots and airport gate leasehold rights
Unusual or Infrequent Item, or Both [Line Items]
Useful life of intangible assets	25 years	25 years
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
American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 1.00	$ 1.00	$ 1.00
Consolidated reporting unit | reporting_unit		1
Goodwill impairment		$ 0
Goodwill	$ 4,091	4,091	$ 4,091
Definite-lived intangible assets, net	101	101	108
Expected amortization expense in 2025	6	6
Expected amortization expense in 2026	6	6
Expected amortization expense in 2027	6	6
Expected amortization expense in 2028	6	6
Expected amortization expense in 2029	6	6
Expected amortization expense in 2030 and thereafter	70	70
Impairment of intangible assets, indefinite-lived (excluding goodwill)		0
Indefinite lived intangible assets	1,900	1,900	1,900
Interest expense		2,029	2,206	1,872
Advertising expense		143	114	105
Foreign currency losses		47	$ 30	$ 38
American Airlines, Inc. | Fuel Financing Arrangement
Unusual or Infrequent Item, or Both [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,000	1,000
Basis spread on variable rate	3.75%
Fuel financing payable	$ 74	$ 74
American Airlines, Inc. | Marketing Agreements
Unusual or Infrequent Item, or Both [Line Items]
Useful life of intangible assets	30 years	30 years
American Airlines, Inc. | Domestic airport slots and airport gate leasehold rights
Unusual or Infrequent Item, or Both [Line Items]
Useful life of intangible assets	25 years	25 years
Air traffic liability
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Contract term		12
Recognition of revenue		$ 4,900
Air traffic liability | American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Recognition of revenue		$ 4,900
Loyalty program liability
Unusual or Infrequent Item, or Both [Line Items]
Payment term		30 days
Number of revenue components | component		2
Recognition of revenue		$ 3,755
Loyalty program liability | Citi
Unusual or Infrequent Item, or Both [Line Items]
Term of agreement	10 years	10 years
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		$ 3,755
Loyalty program liability | American Airlines, Inc. | Citi
Unusual or Infrequent Item, or Both [Line Items]
Term of agreement	10 years	10 years
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		10 years
Loyalty program liability | Maximum | American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		10 years