Debt - AAdvantage Financing (Details) - USD ($) $ in Millions					1 Months Ended	12 Months Ended
	Jul. 20, 2026	Dec. 31, 2025	May 28, 2025	Mar. 24, 2025	Jul. 31, 2023	Dec. 31, 2025	Dec. 31, 2024	Mar. 24, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Long-term debt		$ 28,594				$ 28,594
American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt		24,848				24,848
Secured Debt
Debt Instrument [Line Items]
Long-term debt		24,219				24,219	$ 25,372
Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt		$ 24,219				$ 24,219	25,372
5.50% Senior Notes | Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Aggregate principal issued								$ 3,500
Fixed interest rate per annum								5.50%
Quarterly installments					$ 292
5.50% Senior Notes | Secured Debt
Debt Instrument [Line Items]
Fixed interest rate per annum		5.50%				5.50%
Long-term debt		$ 583				$ 583	1,750
5.50% Senior Notes | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Fixed interest rate per annum		5.50%				5.50%
Long-term debt		$ 583				$ 583	1,750
5.75% Senior Notes | Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Aggregate principal issued								$ 3,000
Fixed interest rate per annum								5.75%
5.75% Senior Notes | Senior Notes | Forecast | American Airlines, Inc.
Debt Instrument [Line Items]
Quarterly installments	$ 250
5.75% Senior Notes | Secured Debt
Debt Instrument [Line Items]
Fixed interest rate per annum		5.75%				5.75%
Long-term debt		$ 3,000				$ 3,000	3,000
5.75% Senior Notes | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Fixed interest rate per annum		5.75%				5.75%
Long-term debt		$ 3,000				$ 3,000	3,000
AAdvantage Term Loan Facility | Secured Debt
Debt Instrument [Line Items]
Mandatory prepayment amount, threshold net proceeds from pre-paid frequent flyer		505				$ 505
AAdvantage Term Loan Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Redemption price percentage						100.00%
Mandatory prepayment amount, threshold net proceeds from pre-paid frequent flyer		505				$ 505
2021 AAdvantage Term Loan Facility | Secured Debt
Debt Instrument [Line Items]
Long-term debt		2,264				2,264	2,450
Quarterly installments						6
2021 AAdvantage Term Loan Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt		$ 2,264				2,264	2,450	$ 3,500
Interest rate margin		2.25%
Quarterly installments						$ 6
2021 AAdvantage Term Loan Facility | Secured Debt | Secured Overnight Financing Rate (SOFR) | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate margin						2.25%
AAdvantage Term Loan Facility, Second Amendment | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Aggregate principal issued				$ 2,300
Scheduled quarterly principal amortization amount, percentage of principal amount of loans outstanding				0.25%
Quarterly principal amortization payable				$ 6
AAdvantage Term Loan Facility, Second Amendment | Secured Debt | Base Rate | American Airlines, Inc.
Debt Instrument [Line Items]
Floor interest rate				0.00%
Interest rate margin				1.25%
AAdvantage Term Loan Facility, Second Amendment | Secured Debt | Secured Overnight Financing Rate (SOFR) | American Airlines, Inc.
Debt Instrument [Line Items]
Floor interest rate				0.00%
Interest rate margin				2.25%
2025 AAdvantage Term Loan Facility | Secured Debt
Debt Instrument [Line Items]
Long-term debt		$ 995				$ 995	0
Quarterly installments						3
2025 AAdvantage Term Loan Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt		$ 995	$ 1,000			995	$ 0
Interest rate margin		3.25%
Quarterly installments						$ 3
AAdvantage Term Loan Facility, Third Amendment | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Aggregate principal issued			1,000
Quarterly principal amortization payable			$ 3
Scheduled quarterly principal amortization amount, percentage of original aggregate principal amount			0.25%
AAdvantage Term Loan Facility, Third Amendment | Secured Debt | Base Rate | American Airlines, Inc.
Debt Instrument [Line Items]
Floor interest rate			0.00%
Interest rate margin			2.25%
AAdvantage Term Loan Facility, Third Amendment | Secured Debt | Secured Overnight Financing Rate (SOFR) | American Airlines, Inc.
Debt Instrument [Line Items]
Floor interest rate			0.00%
Interest rate margin			3.25%
Convertible Senior Notes 6.50% Due 2025 | Senior Notes
Debt Instrument [Line Items]
Aggregate principal issued									$ 1,000
Fixed interest rate per annum		6.50%				6.50%			6.50%
Convertible Senior Notes 6.50% Due 2025 | Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Fixed interest rate per annum		6.50%				6.50%