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, 2025 USD ($) component reporting_unit $ / shares	Dec. 31, 2024 USD ($) $ / shares	Dec. 31, 2023 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	124	101
Expected amortization expense in 2026		7
Expected amortization expense in 2027		7
Expected amortization expense in 2028		7
Expected amortization expense in 2029		7
Expected amortization expense in 2030		7
Expected amortization expense in 2031 and thereafter		88
Impairment of intangible assets, indefinite-lived (excluding goodwill)		0
Indefinite lived intangible assets	1,900	1,900	1,900
Interest expense		1,716	1,934	$ 2,145
Advertising expense		200	143	114
Foreign currency losses		15	48	30
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	$ 74	$ 914	$ 74	0
Marketing Agreements
Unusual or Infrequent Item, or Both [Line Items]
Useful life of intangible assets		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
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	124	101
Expected amortization expense in 2026		7
Expected amortization expense in 2027		7
Expected amortization expense in 2028		7
Expected amortization expense in 2029		7
Expected amortization expense in 2030		7
Expected amortization expense in 2031 and thereafter		88
Impairment of intangible assets, indefinite-lived (excluding goodwill)		0
Indefinite lived intangible assets	1,900	1,900	1,900
Interest expense		1,780	2,029	2,206
Advertising expense		200	143	114
Foreign currency losses		15	47	30
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	$ 74	$ 914	$ 74	$ 0
American Airlines, Inc. | Marketing Agreements
Unusual or Infrequent Item, or Both [Line Items]
Useful life of intangible assets		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
American Airlines, Inc. | Account Receivable from Business Partners
Unusual or Infrequent Item, or Both [Line Items]
Contract receivables settlement duration		30 days
American Airlines, Inc. | Account Receivable from Ticket Sales
Unusual or Infrequent Item, or Both [Line Items]
Contract receivables settlement duration		7 days
Air traffic liability
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Contract term		12
Recognition of revenue		$ 5,100
Air traffic liability | American Airlines, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Performance obligation term		1 year
Recognition of revenue		$ 5,100
Loyalty program liability
Unusual or Infrequent Item, or Both [Line Items]
Payment term		30 days
Number of revenue components | component		2
Recognition of revenue		$ 3,935
Loyalty program liability | Citi
Unusual or Infrequent Item, or Both [Line Items]
Term of agreement (in years)	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		$ 3,935
Loyalty program liability | American Airlines, Inc. | Citi
Unusual or Infrequent Item, or Both [Line Items]
Term of agreement (in years)	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