Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2018
Income Taxes [Line Items]
Income Taxes	Income Taxes At December 31, 2017, we had approximately $10.0 billion of federal net operating losses (NOLs) carried over from prior taxable years (NOL Carryforwards) to reduce future federal taxable income, substantially all of which we expect to be available for use in 2018. The federal NOL Carryforwards will expire beginning in 2022 if unused. We also had approximately $3.4 billion of NOL Carryforwards to reduce future state taxable income at December 31, 2017, which will expire in years 2018 through 2037 if unused. At December 31, 2017, we had an AMT credit carryforward of approximately $339 million available for federal income tax purposes, which is expected to be substantially refunded no later than 2021 as a result of the repeal of corporate AMT. During the three and nine months ended September 30, 2018, we recorded an income tax provision of $115 million and $404 million, respectively, which was substantially non-cash as we utilized our NOLs described above. For the nine months ended September 30, 2018, our income tax provision included a $22 million special income tax charge to establish a required valuation allowance related to our estimated refund for AMT credits, which is now subject to a sequestration reduction rate of approximately 6% and an $18 million special income tax charge related to an international income tax matter. Substantially all of our income before income taxes is attributable to the United States. The 2017 Tax Act was enacted on December 22, 2017. The 2017 Tax Act is the most comprehensive tax change in more than 30 years. As of September 30, 2018, we have not completed our evaluation of the 2017 Tax Act; however, to the extent possible, we have made a reasonable estimate of its effects, including the impact of lower corporate income tax rates (21% vs. 35%) on our deferred tax assets and liabilities and the one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred. The 2017 Tax Act is unclear in many respects and could be subject to potential amendments and technical corrections, as well as interpretations and implementation guidance by the U.S. Department of Treasury and the Internal Revenue Service. In addition, it is unclear how these U.S. federal income tax changes will affect state and local taxation, which often uses federal taxable income as a starting point for computing state and local tax liabilities. Accordingly, we have not yet been able to make a reasonable estimate of the impact of certain items and continue to account for those items based on the tax laws in effect prior to the 2017 Tax Act. As further interpretations, clarifications and amendments to the 2017 Tax Act are made, our future financial statements could be materially impacted.
American Airlines, Inc. [Member]
Income Taxes [Line Items]
Income Taxes	Income Taxes At December 31, 2017, American had approximately $10.6 billion of federal net operating losses (NOLs) carried over from prior taxable years (NOL Carryforwards) to reduce future federal taxable income, substantially all of which, American expects to be available for use in 2018. American is a member of AAG’s consolidated federal and certain state income tax returns. The amount of federal NOL Carryforwards available in those returns is $10.0 billion, substantially all of which is expected to be available for use in 2018. The federal NOL Carryforwards will expire beginning in 2022 if unused. American also had approximately $3.2 billion of NOL Carryforwards to reduce future state taxable income at December 31, 2017, which will expire in years 2018 through 2037 if unused. At December 31, 2017, American had an AMT credit carryforward of approximately $452 million available for federal income tax purposes. During the three and nine months ended September 30, 2018, American recorded an income tax provision of $133 million and $467 million, respectively, which was substantially non-cash as American utilized the NOLs described above. For the nine months ended September 30, 2018, American's income tax provision included a $30 million special income tax charge to establish a required valuation allowance related to American's estimated refund for AMT credits, which is now subject to a sequestration reduction rate of approximately 6% and an $18 million special income tax charge related to an international income tax matter. Substantially all of American’s income before income taxes is attributable to the United States. The 2017 Tax Act was enacted on December 22, 2017. The 2017 Tax Act is the most comprehensive tax change in more than 30 years. As of September 30, 2018, American has not completed its evaluation of the 2017 Tax Act; however, to the extent possible, American has made a reasonable estimate of its effects, including the impact of lower corporate income tax rates (21% vs. 35%) on its deferred tax assets and liabilities and the one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred. The 2017 Tax Act is unclear in many respects and could be subject to potential amendments and technical corrections, as well as interpretations and implementation guidance by the U.S. Department of Treasury and the Internal Revenue Service. In addition, it is unclear how these U.S. federal income tax changes will affect state and local taxation, which often uses federal taxable income as a starting point for computing state and local tax liabilities. Accordingly, American has not yet been able to make a reasonable estimate of the impact of certain items and continues to account for those items based on the tax laws in effect prior to the 2017 Tax Act. As further interpretations, clarifications and amendments to the 2017 Tax Act are made, American's future financial statements could be materially impacted.