Debt - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) day	Oct. 13, 2026 USD ($)	Oct. 11, 2024 USD ($)
6.50% Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate	6.50%
Conversion terms, percentage sales price exceeds conversion price	130.00%
Convertible debt, threshold trading days | day	20
Convertible debt, threshold consecutive trading days | day	30
Conversion ratio	0.0617284
Equipment Loans and Other Notes Payable Issued in Current Year | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from secured notes payable	$ 251
Equipment Loans and Other Notes Payable Issued in Current Year | Secured Debt | American Airlines, Inc. | SOFR
Debt Instrument [Line Items]
Average interest rate	7.02%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity	$ 3,211
Revolving Credit Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity	3,211
Revolving Credit Facility | Forecast | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments		$ 2,200	$ 2,800
Revolving Credit Facility | Other Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	350
Revolving Credit Facility | Other Revolving Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Amount drawn	0
Revolving Credit Facility | Cargo Receivable Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity	$ 48