Employee Benefit Plans Employee Benefit Plans - Profit Sharing Program (Details) - Deferred Profit Sharing [Member] $ in Millions |
12 Months Ended |
---|---|
Dec. 31, 2017
USD ($)
| |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] | |
Pre-tax income excluding special items for employee profit sharing, percentage | 5.00% |
Employee profit sharing program, amount | $ 241 |
American Airlines, Inc. [Member] | |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] | |
Pre-tax income excluding special items for employee profit sharing, percentage | 5.00% |
Employee profit sharing program, amount | $ 241 |