Employee Benefit Plans - Schedule of Allocation of Plan Assets (Details)	Dec. 31, 2021
Equity | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
Equity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	80.00%
U.S. Large | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
U.S. Large | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	40.00%
U.S. Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
U.S. Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	25.00%
International Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
International Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
Emerging Markets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
Emerging Markets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
Alternative Investments | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
Alternative Investments | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
Fixed Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
Fixed Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	55.00%
U.S. Long Duration | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
U.S. Long Duration | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
High Yield and Emerging Markets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
High Yield and Emerging Markets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
Private Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Private Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
Other investments | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Other investments | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
Cash Equivalents | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Cash Equivalents | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
American Airlines, Inc. | Equity | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
American Airlines, Inc. | Equity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	80.00%
American Airlines, Inc. | U.S. Large | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | U.S. Large | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	40.00%
American Airlines, Inc. | U.S. Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
American Airlines, Inc. | U.S. Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	25.00%
American Airlines, Inc. | International Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | International Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | Emerging Markets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
American Airlines, Inc. | Emerging Markets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. | Alternative Investments | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. | Alternative Investments | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
American Airlines, Inc. | Fixed Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
American Airlines, Inc. | Fixed Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	55.00%
American Airlines, Inc. | U.S. Long Duration | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. | U.S. Long Duration | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
American Airlines, Inc. | High Yield and Emerging Markets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | High Yield and Emerging Markets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | Private Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Private Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. | Other investments | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Other investments | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. | Cash Equivalents | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Cash Equivalents | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%