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Employee Benefit Plans - Schedule of Fair Value of Pension Plan Assets by Asset Category (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 58 $ 17 $ 12
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,691 13,557 12,897
Pension Benefits | Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,691 13,557  
Pension Benefits | Recurring | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,956 5,039  
Pension Benefits | Recurring | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,336 4,326  
Pension Benefits | Recurring | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 58 17  
Pension Benefits | Recurring | Cash and cash equivalents | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 76 40  
Pension Benefits | Recurring | Cash and cash equivalents | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 76 40  
Pension Benefits | Recurring | Cash and cash equivalents | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Cash and cash equivalents | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | International markets | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,170 2,282  
Pension Benefits | Recurring | International markets | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,166 2,282  
Pension Benefits | Recurring | International markets | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | International markets | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 0  
Pension Benefits | Recurring | Large-cap companies | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,860 2,085  
Pension Benefits | Recurring | Large-cap companies | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,860 2,085  
Pension Benefits | Recurring | Large-cap companies | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Large-cap companies | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Mid-cap companies | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 449 428  
Pension Benefits | Recurring | Mid-cap companies | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 449 428  
Pension Benefits | Recurring | Mid-cap companies | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Mid-cap companies | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Small-cap companies | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 86 74  
Pension Benefits | Recurring | Small-cap companies | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 84 73  
Pension Benefits | Recurring | Small-cap companies | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 1  
Pension Benefits | Recurring | Small-cap companies | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Mutual funds/exchange traded funds | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 263 80  
Pension Benefits | Recurring | Mutual funds/exchange traded funds | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 263 80  
Pension Benefits | Recurring | Mutual funds/exchange traded funds | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Mutual funds/exchange traded funds | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Corporate obligations | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,847 3,026  
Pension Benefits | Recurring | Corporate obligations | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Corporate obligations | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,847 3,026  
Pension Benefits | Recurring | Corporate obligations | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Government Securities | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,128 1,010  
Pension Benefits | Recurring | Government Securities | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Government Securities | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,128 1,010  
Pension Benefits | Recurring | Government Securities | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | U.S. municipal securities | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 30  
Pension Benefits | Recurring | U.S. municipal securities | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | U.S. municipal securities | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 30  
Pension Benefits | Recurring | U.S. municipal securities | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Private Equity Funds | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52 15  
Pension Benefits | Recurring | Private Equity Funds | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Private Equity Funds | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Private Equity Funds | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52 15  
Pension Benefits | Recurring | Private Equity Funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,827 1,791  
Pension Benefits | Recurring | Common/collective trusts | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 337 259  
Pension Benefits | Recurring | Common/collective trusts | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Common/collective trusts | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 337 259  
Pension Benefits | Recurring | Common/collective trusts | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Common/collective trusts and 103-12 Investment Trust measured at net asset value | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,514 2,384  
Pension Benefits | Recurring | Insurance group annuity contracts | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Pension Benefits | Recurring | Insurance group annuity contracts | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Insurance group annuity contracts | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Insurance group annuity contracts | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Pension Benefits | Recurring | Other investments | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3    
Pension Benefits | Recurring | Other investments | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Pension Benefits | Recurring | Other investments | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3    
Pension Benefits | Recurring | Other investments | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Pension Benefits | Recurring | Dividend and interest receivable | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 49  
Pension Benefits | Recurring | Dividend and interest receivable | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 49  
Pension Benefits | Recurring | Dividend and interest receivable | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Dividend and interest receivable | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Due from brokers for sale of securities – net | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 1  
Pension Benefits | Recurring | Due from brokers for sale of securities – net | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 1  
Pension Benefits | Recurring | Due from brokers for sale of securities – net | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Due from brokers for sale of securities – net | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Other receivables – net | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
Pension Benefits | Recurring | Other receivables – net | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
Pension Benefits | Recurring | Other receivables – net | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Recurring | Other receivables – net | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 58 17 12
American Airlines, Inc. | Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,605 13,477 $ 12,829
American Airlines, Inc. | Pension Benefits | Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,605 13,477  
American Airlines, Inc. | Pension Benefits | Recurring | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,870 4,959  
American Airlines, Inc. | Pension Benefits | Recurring | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,336 4,326  
American Airlines, Inc. | Pension Benefits | Recurring | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 58 17  
American Airlines, Inc. | Pension Benefits | Recurring | Cash and cash equivalents | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 76 40  
American Airlines, Inc. | Pension Benefits | Recurring | Cash and cash equivalents | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 76 40  
American Airlines, Inc. | Pension Benefits | Recurring | Cash and cash equivalents | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Cash and cash equivalents | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | International markets | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,170 2,282  
American Airlines, Inc. | Pension Benefits | Recurring | International markets | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,166 2,282  
American Airlines, Inc. | Pension Benefits | Recurring | International markets | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | International markets | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 0  
American Airlines, Inc. | Pension Benefits | Recurring | Large-cap companies | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,860 2,085  
American Airlines, Inc. | Pension Benefits | Recurring | Large-cap companies | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,860 2,085  
American Airlines, Inc. | Pension Benefits | Recurring | Large-cap companies | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Large-cap companies | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Mid-cap companies | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 449 428  
American Airlines, Inc. | Pension Benefits | Recurring | Mid-cap companies | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 449 428  
American Airlines, Inc. | Pension Benefits | Recurring | Mid-cap companies | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Mid-cap companies | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Small-cap companies | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 86 74  
American Airlines, Inc. | Pension Benefits | Recurring | Small-cap companies | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 84 73  
American Airlines, Inc. | Pension Benefits | Recurring | Small-cap companies | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 1  
American Airlines, Inc. | Pension Benefits | Recurring | Small-cap companies | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Mutual funds/exchange traded funds | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 177    
American Airlines, Inc. | Pension Benefits | Recurring | Mutual funds/exchange traded funds | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 177    
American Airlines, Inc. | Pension Benefits | Recurring | Mutual funds/exchange traded funds | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
American Airlines, Inc. | Pension Benefits | Recurring | Mutual funds/exchange traded funds | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
American Airlines, Inc. | Pension Benefits | Recurring | Corporate obligations | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,847 3,026  
American Airlines, Inc. | Pension Benefits | Recurring | Corporate obligations | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Corporate obligations | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,847 3,026  
American Airlines, Inc. | Pension Benefits | Recurring | Corporate obligations | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Government Securities | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,128 1,010  
American Airlines, Inc. | Pension Benefits | Recurring | Government Securities | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Government Securities | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,128 1,010  
American Airlines, Inc. | Pension Benefits | Recurring | Government Securities | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | U.S. municipal securities | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 30  
American Airlines, Inc. | Pension Benefits | Recurring | U.S. municipal securities | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | U.S. municipal securities | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 30  
American Airlines, Inc. | Pension Benefits | Recurring | U.S. municipal securities | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Private Equity Funds | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52 15  
American Airlines, Inc. | Pension Benefits | Recurring | Private Equity Funds | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Private Equity Funds | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Private Equity Funds | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52 15  
American Airlines, Inc. | Pension Benefits | Recurring | Private Equity Funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,827 1,791  
American Airlines, Inc. | Pension Benefits | Recurring | Common/collective trusts | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 337 259  
American Airlines, Inc. | Pension Benefits | Recurring | Common/collective trusts | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Common/collective trusts | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 337 259  
American Airlines, Inc. | Pension Benefits | Recurring | Common/collective trusts | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Common/collective trusts and 103-12 Investment Trust measured at net asset value | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,514 2,384  
American Airlines, Inc. | Pension Benefits | Recurring | Insurance group annuity contracts | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
American Airlines, Inc. | Pension Benefits | Recurring | Insurance group annuity contracts | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Insurance group annuity contracts | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Insurance group annuity contracts | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
American Airlines, Inc. | Pension Benefits | Recurring | Other investments | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3    
American Airlines, Inc. | Pension Benefits | Recurring | Other investments | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
American Airlines, Inc. | Pension Benefits | Recurring | Other investments | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3    
American Airlines, Inc. | Pension Benefits | Recurring | Other investments | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
American Airlines, Inc. | Pension Benefits | Recurring | Dividend and interest receivable | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 49  
American Airlines, Inc. | Pension Benefits | Recurring | Dividend and interest receivable | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 49  
American Airlines, Inc. | Pension Benefits | Recurring | Dividend and interest receivable | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Dividend and interest receivable | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Due from brokers for sale of securities – net | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 1  
American Airlines, Inc. | Pension Benefits | Recurring | Due from brokers for sale of securities – net | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 1  
American Airlines, Inc. | Pension Benefits | Recurring | Due from brokers for sale of securities – net | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Due from brokers for sale of securities – net | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Other receivables – net | Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
American Airlines, Inc. | Pension Benefits | Recurring | Other receivables – net | Level 1          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
American Airlines, Inc. | Pension Benefits | Recurring | Other receivables – net | Level 2          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
American Airlines, Inc. | Pension Benefits | Recurring | Other receivables – net | Level 3          
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0