Debt - Narrative (Details) $ in Millions		3 Months Ended	9 Months Ended
	Jun. 04, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) day	Sep. 30, 2023 USD ($)	Jun. 04, 2029 USD ($)	Jun. 03, 2024 USD ($)	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt			$ 1,252	$ 2,324
American Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt			$ 1,252	$ 2,324
6.50% Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate		6.50%	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
2023 Term Loan Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Debt instrument, basis spread on variable rate, interest rate margin	1.50%
2023 Term Loan Facility | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
2023 Term Loan Facility | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
2023 Term Loan Facility | American Airlines, Inc. | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Debt instrument, basis spread on variable rate, interest rate margin	1.50%
2023 Term Loan Facility | American Airlines, Inc. | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
2023 Term Loan Facility | American Airlines, Inc. | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
EETCs Issued In Current Year | Secured Debt
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt		$ 684
Average interest rate		7.10%	7.10%
EETCs Issued In Current Year | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt		$ 684
Average interest rate		7.10%	7.10%
Equipment Loans and Other Notes Payable Issued in Current Year | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from secured notes payable			$ 571
Equipment Loans and Other Notes Payable Issued in Current Year | Secured Debt | American Airlines, Inc. | SOFR
Debt Instrument [Line Items]
Average interest rate		6.86%	6.86%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		$ 3,290	$ 3,290
Revolving Credit Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		3,290	3,290
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	0
Revolving Credit Facility | Cargo Receivable Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		50	50
Revolving Credit Facility | 2013, 2014 and 2023 Credit Facilities | Forecast | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity					$ 2,900
Revolving Credit Facility | 2013 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		500	500
Revolving Credit Facility | 2013 Revolving Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | 2013 Revolving Facility | Base Rate | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.00%
Revolving Credit Facility | 2013 Revolving Facility | Base Rate | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.25%
Revolving Credit Facility | 2013 Revolving Facility | Base Rate | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
Revolving Credit Facility | 2013 Revolving Facility | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Revolving Credit Facility | 2013 Revolving Facility | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.00%
Revolving Credit Facility | 2013 Revolving Facility | SOFR | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.25%
Revolving Credit Facility | 2013 Revolving Facility | SOFR | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.50%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		500	500
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.00%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.25%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.00%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.25%
Revolving Credit Facility | 2013 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.50%
Revolving Credit Facility | 2013 Revolving Facility | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	$ 500
Revolving Credit Facility | 2013 Revolving Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	$ 500
Revolving Credit Facility | 2014 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		1,500	1,500
Revolving Credit Facility | 2014 Revolving Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | 2014 Revolving Facility | Base Rate | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.00%
Revolving Credit Facility | 2014 Revolving Facility | Base Rate | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.25%
Revolving Credit Facility | 2014 Revolving Facility | Base Rate | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
Revolving Credit Facility | 2014 Revolving Facility | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Revolving Credit Facility | 2014 Revolving Facility | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.00%
Revolving Credit Facility | 2014 Revolving Facility | SOFR | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.25%
Revolving Credit Facility | 2014 Revolving Facility | SOFR | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.50%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		1,500	1,500
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.00%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.25%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.00%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.25%
Revolving Credit Facility | 2014 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.50%
Revolving Credit Facility | 2014 Revolving Facility | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	$ 1,500
Minimum liquidity	2,000					$ 2,200
Restricted payments liquidity requirement	4,000					4,200
Revolving Credit Facility | 2014 Revolving Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	1,500
Minimum liquidity	2,000					2,200
Restricted payments liquidity requirement	$ 4,000					4,200
Revolving Credit Facility | 2023 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		890	890
Revolving Credit Facility | 2023 Revolving Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | 2023 Revolving Facility | Base Rate | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.00%
Revolving Credit Facility | 2023 Revolving Facility | Base Rate | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.25%
Revolving Credit Facility | 2023 Revolving Facility | Base Rate | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
Revolving Credit Facility | 2023 Revolving Facility | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Revolving Credit Facility | 2023 Revolving Facility | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.00%
Revolving Credit Facility | 2023 Revolving Facility | SOFR | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.25%
Revolving Credit Facility | 2023 Revolving Facility | SOFR | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.50%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity		$ 890	$ 890
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.00%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.25%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | Base Rate | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	2.50%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.00%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.25%
Revolving Credit Facility | 2023 Revolving Facility | American Airlines, Inc. | SOFR | Interest Rate Margin Three
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate, interest rate margin	3.50%
Revolving Credit Facility | 2023 Revolving Facility | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	$ 890
Revolving Credit Facility | 2023 Revolving Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	890
Letter of Credit | 2013 Revolving Facility | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	100
Letter of Credit | 2013 Revolving Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	100
Letter of Credit | 2014 Revolving Facility | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	200
Letter of Credit | 2014 Revolving Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	200
Term Loan | 2023 Term Loan Facility | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments						1,100
Term Loan | 2023 Term Loan Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments						$ 1,100
Term Loan | 2023 Term Loan Facility | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	1,100
Term Loan | 2023 Term Loan Facility | Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	$ 1,100