Debt - 2023 Credit Facilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 23, 2024	Jun. 04, 2024	Dec. 22, 2024	Jun. 03, 2024	Dec. 31, 2023
Line of Credit Facility [Line Items]
Total long-term debt	$ 30,118					$ 32,759
American Airlines, Inc.
Line of Credit Facility [Line Items]
Total long-term debt	25,372
Secured Debt
Line of Credit Facility [Line Items]
Total long-term debt	25,372					27,526
Secured Debt | American Airlines, Inc.
Line of Credit Facility [Line Items]
Total long-term debt	25,372					27,526
Credit Facility 2023 | Secured Debt
Line of Credit Facility [Line Items]
Total long-term debt	1,089					1,100
Credit Facility 2023 | Secured Debt | American Airlines, Inc.
Line of Credit Facility [Line Items]
Total long-term debt	1,089					$ 1,100
Initial Term Loan | 2023 Credit Facilities | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity					$ 1,100
Total long-term debt		$ 1,100
Initial Term Loan | 2023 Credit Facilities | Secured Debt | American Airlines, Inc.
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 1,100	$ 1,100
Term Loan | 2023 Credit Facilities | Base Rate
Line of Credit Facility [Line Items]
Floor interest rate		1.00%
Term Loan | 2023 Credit Facilities | Base Rate | American Airlines, Inc.
Line of Credit Facility [Line Items]
Floor interest rate			1.00%
Term Loan | 2023 Credit Facilities | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Floor interest rate			0.00%
Term Loan | 2023 Credit Facilities | Secured Overnight Financing Rate (SOFR) | American Airlines, Inc.
Line of Credit Facility [Line Items]
Floor interest rate			0.00%
Term Loan | 2023 Credit Facilities | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,100		$ 1,100
Total long-term debt	1,100
Term Loan | 2023 Credit Facilities | Secured Debt | American Airlines, Inc.
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,100	$ 1,100	$ 1,100
Term Loan | 2023 Credit Facilities | Secured Debt | Base Rate
Line of Credit Facility [Line Items]
Interest rate margin		1.25%
Term Loan | 2023 Credit Facilities | Secured Debt | Base Rate | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin		1.25%
Term Loan | 2023 Credit Facilities | Secured Debt | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Interest rate margin	2.25%	2.25%
Term Loan | 2023 Credit Facilities | Secured Debt | Secured Overnight Financing Rate (SOFR) | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin	2.25%	2.25%
Revolving Credit Facility | Credit Facility 2023 | Base Rate
Line of Credit Facility [Line Items]
Floor interest rate			1.00%
Revolving Credit Facility | Credit Facility 2023 | Base Rate | American Airlines, Inc.
Line of Credit Facility [Line Items]
Floor interest rate			1.00%
Revolving Credit Facility | Credit Facility 2023 | Base Rate | Interest Rate Margin One
Line of Credit Facility [Line Items]
Interest rate margin			2.00%
Revolving Credit Facility | Credit Facility 2023 | Base Rate | Interest Rate Margin One | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin			2.00%
Revolving Credit Facility | Credit Facility 2023 | Base Rate | Interest Rate Margin Two
Line of Credit Facility [Line Items]
Interest rate margin			2.25%
Revolving Credit Facility | Credit Facility 2023 | Base Rate | Interest Rate Margin Two | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin			2.25%
Revolving Credit Facility | Credit Facility 2023 | Base Rate | Interest Rate Margin Three
Line of Credit Facility [Line Items]
Interest rate margin			2.50%
Revolving Credit Facility | Credit Facility 2023 | Base Rate | Interest Rate Margin Three | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin			2.50%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Floor interest rate			0.00%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR) | American Airlines, Inc.
Line of Credit Facility [Line Items]
Floor interest rate			0.00%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR) | Interest Rate Margin One
Line of Credit Facility [Line Items]
Interest rate margin			3.00%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR) | Interest Rate Margin One | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin			3.00%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR) | Interest Rate Margin Two
Line of Credit Facility [Line Items]
Interest rate margin			3.25%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR) | Interest Rate Margin Two | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin			3.25%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR) | Interest Rate Margin Three
Line of Credit Facility [Line Items]
Interest rate margin			3.50%
Revolving Credit Facility | Credit Facility 2023 | Secured Overnight Financing Rate (SOFR) | Interest Rate Margin Three | American Airlines, Inc.
Line of Credit Facility [Line Items]
Interest rate margin			3.50%
Revolving Credit Facility | Credit Facility 2023 | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			$ 890
Long-term line of credit	$ 0
Revolving Credit Facility | Credit Facility 2023 | Secured Debt | American Airlines, Inc.
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			$ 890
Long-term line of credit	$ 0