Inactive period before expiration of mileage credits Inactive Period Before Expiration Of Mileage Credits Inactive Period Before Expiration Of Mileage Credits Supplemental information: Supplemental Cash Flow Information [Abstract] Unrealized Gain (Loss) on Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Legal Proceedings Legal Matters and Contingencies [Text Block] 5.000% Senior Notes Senior Notes 5.000% Due 2022 [Member] Senior Notes 5.000% Due 2022 [Member] Convertible Note Convertible Debt [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Financial assistance received under the CARES Act Proceeds From Government Assistance, Payroll Support Program, CARES Act Proceeds From Government Assistance, Payroll Support Program, CARES Act Net income (loss) Net income (loss) Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Payroll support program grant, deferred in other accrued liabilities Payroll Support Program Grant, Deferred In Other Accrued Liabilities Payroll Support Program Grant, Deferred In Other Accrued Liabilities Entity Emerging Growth Company Entity Emerging Growth Company Consolidated Entities [Axis] Consolidated Entities [Axis] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Short-term investments Debt Securities, Available-for-sale, Current Interest cost Defined Benefit Plan, Interest Cost Accrued salaries and wages Employee-related Liabilities, Current Statistical Measurement [Domain] Statistical Measurement [Domain] Accumulated amortization of intangibles Finite-Lived Intangible Assets, Accumulated Amortization Entity Address, Address Line One Entity Address, Address Line One Covenant terms, threshold net proceeds from pre-paid frequent flyer Debt Instrument, Covenant Terms, Threshold Net Proceeds From Pre-paid Frequent Flyer Debt Instrument, Covenant Terms, Threshold Net Proceeds From Pre-paid Frequent Flyer Republic Airline Inc. Republic Airline Inc [Member] Republic Airline Inc [Member] Special termination benefits Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment Loyalty revenue - marketing services Loyalty Program, Marketing Services [Member] Loyalty Program, Marketing Services [Member] Long-term investments Equity Securities, FV-NI, Current Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Schedule of Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Additional paid-in capital Additional Paid in Capital, Common Stock Pension, retiree medical and other postretirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Entity Filer Category Entity Filer Category Common stock, remaining 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Rate Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] AAG's wholly-owned subsidiaries Subsidiary of Common Parent [Member] Total property and equipment, at cost Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Pension and postretirement benefits Liability, Defined Benefit Plan, Noncurrent Credit Facility [Domain] Credit Facility [Domain] ASSETS Assets [Abstract] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Unrecognized net loss (gain) Defined Benefit Plan, Amortization of Gain (Loss) Loyalty program liability Loyalty Program [Member] Loyalty Program [Member] 10.75% Senior Secured Notes, LGA/DCA Notes 10.75% Senior Secured Notes, LGA/DCA Notes [Member] 10.75% Senior Secured Notes, LGA/DCA Notes Property and equipment acquired through finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability 2021 JFK Bonds 2021 JFK Bonds [Member] 2021 JFK Bond Payroll Support Program Promissory Note Two, CARES Act Payroll Support Program Promissory Note Two, CARES Act [Member] Payroll Support Program Promissory Note Two, CARES Act New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Airline Destinations [Axis] Airline Destinations [Axis] New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Entity Address, City or Town Entity Address, City or Town Convertible debt, threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Price per share (in dollars per share) Shares Issued, Price Per Share Retained Deficit Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] Term Loan Facility Term Loan Facility [Member] Term Loan Facility Area of terminal building Area of Real Estate Property Noncurrent liabilities Liabilities, Noncurrent [Abstract] Dividend payments Payments of Ordinary Dividends Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Write-down of aircraft and spare parts Fleet Equipment Impairment And Inventory Write-Down Fleet Equipment Impairment And Inventory Write-Down Beginning balance, tax Ending balance, tax AOCI Tax, Attributable to Parent Project [Domain] Project [Domain] Related Party [Axis] Related Party [Axis] Intercompany equity transfer Intercompany Equity Transfer Intercompany Equity Transfer Prior service cost (benefit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Purchase and retirement of AAG common stock Stock Repurchased and Retired During Period, Value Secured Debt Secured Debt [Member] Right-of-use (ROU) assets acquired through operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Average interest rate Debt, Weighted Average Interest Rate Aircraft fuel and related taxes Fuel Costs Entity Interactive Data Current Entity Interactive Data Current Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Basic (in dollars per share) Basic EPS (in dollars per share) Earnings Per Share, Basic Revenue Recognition Revenue from Contract with Customer [Text Block] Restricted cash and short-term investments Restricted Cash and Investments, Current Document Type Document Type Special Facility Revenue Bonds Special Facility Revenue Bonds [Member] Special Facility Revenue Bonds [Member] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Diluted EPS: Earnings Per Share, Diluted [Abstract] Entity Current Reporting Status Entity Current Reporting Status Receivables from related parties, net Related Party Transaction, Due from (to) Related Party, Current Cumulative Effect, Period of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes Share-based Payment Arrangement, Decrease for Tax Withholding Obligation NOL carryforward not subject to expiration Operating Loss Carryforwards, Not Subject to Expiration Operating Loss Carryforwards, Not Subject to Expiration Accounts receivable, net Receivables, Net, Current Line of credit facility, maximum borrowing capacity, with election of option to extend Line of Credit Facility, Maximum Borrowing Capacity, With Election Of Option To Extend Line of Credit Facility, Maximum Borrowing Capacity, With Election Of Option To Extend 2016 JFK Bonds and 2020 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[Axis] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Mandatory prepayment amount, threshold net proceeds from pre-paid frequent flyer Debt Instrument, Mandatory Prepayment Amount, Threshold Net Proceeds From Pre-paid Frequent Flyer Debt Instrument, Mandatory Prepayment Amount, Threshold Net Proceeds From Pre-paid Frequent Flyer Document Transition Report Document Transition Report Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Total liabilities and stockholders’ equity (deficit) Liabilities and Equity Other accrued liabilities Other Accrued Liabilities, Current Deferred revenue, current Contract with Customer, Liability, Current Scenario [Axis] Scenario [Axis] US Department of the Treasury, CARES Act, Payroll Support Program Two US Department Of The Treasury, CARES Act, Payroll Support Program Two [Member] US Department Of The Treasury, CARES Act, Payroll Support Program Two LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT) Liabilities and Equity [Abstract] Operating property and equipment Property, Plant and Equipment, Net [Abstract] Amounts reclassified from AOCI, tax Reclassification from AOCI, Current Period, Tax Earnings (Loss) Per Common Share Earnings Per Share [Text Block] Write-offs of ROU assets and lease return costs Operating Lease, Impairment Loss Ownership percentage Equity Method Investment, Ownership Percentage Amortization of: Defined Benefit Plan, Amortization [Abstract] Defined Benefit Plan, Amortization [Abstract] Minimum Minimum [Member] Equipment Loans and Other Notes Payable Equipment Loans and Other Notes Payable [Member] Equipment Loans and Other Notes Payable [Member] Settlements Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Conversion ratio Debt Instrument, Convertible, Conversion Ratio Other PSP2 Financial Assistance, CARES Act Other Payroll Support Program Two Financial Assistance, CARES Act [Member] Other Payroll Support Program Two Financial Assistance, CARES Act Contributions expected to be deferred under CARES Act Defined Benefit Plan, Contributions Made For Prior Year Under CARES Act Defined Benefit Plan, Contributions Made For Prior Year Under CARES Act American Airlines, Inc. Subsidiaries [Member] Income Tax Authority [Domain] Income Tax Authority [Domain] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] 10.75% Senior Secured Notes, IP Notes 10.75% Senior Secured Notes, IP Notes [Member] 10.75% Senior Secured Notes, IP Notes Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Movement In Contract With Customer, Liability [Roll Forward] Movement In Contract With Customer, Liability [Roll Forward] Movement In Contract With Customer, Liability [Roll Forward] Other assets Other Assets, Noncurrent [Abstract] Trading Symbol Trading Symbol Amounts reclassified from AOCI, net of tax Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Percentage of cash receipts saved in collection account (at least) Debt Instrument, Covenant Terms, Percentage of Cash Receipts Deposited In Collection Account Debt Instrument, Covenant Terms, Percentage of Cash Receipts Deposited In Collection Account Public Stock Offering Public Stock Offering [Member] Public Stock Offering Deferred tax asset Deferred Income Tax Assets, Net Loyalty revenue - travel Loyalty Program, Travel Redemptions [Member] Loyalty Program, Travel Redemptions [Member] Current liabilities Liabilities, Current [Abstract] Issuance of AAG common stock, net of offering costs Stock Issued During Period, Value, New Issues Debt Debt Disclosure [Text Block] Line of Credit Line of Credit [Member] Senior Notes Senior Notes [Member] Level 3 Fair Value, Inputs, Level 3 [Member] PSP1 Warrants Payroll Support Program One Warrants, CARES Act [Member] Payroll Support Program One Warrants, CARES Act Less accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Deferred financing costs paid through issuance of debt Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Aircraft fuel, spare parts and supplies, net Airline Related Inventory, Net Issuance of shares of AAG common stock (in shares) Issuance of shares of AAG common stock pursuant to a public stock offering (in shares) Stock Issued During Period, Shares, New Issues Common stock, $0.01 par value; 1,750,000,000 shares authorized, 647,446,499 shares issued and outstanding at June 30, 2021; 621,479,522 shares issued and outstanding at December 31, 2020 Common Stock, Value, Issued Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total nonoperating expense, net Nonoperating other income (expense), net Nonoperating Income (Expense) Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Retiree Medical and Other Postretirement Benefits Other Postretirement Benefits Plan [Member] Commitments and contingencies Commitments and Contingencies Subsequent Event [Table] Subsequent Event [Table] Accumulated other comprehensive loss Beginning balance, net of tax Ending balance, net of tax Accumulated 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international capacity in percentage Decrease In Flight Travel Compared to Prior Year, Long-haul International Capacity, Percentage Decrease In Flight Travel Compared to Prior Year, Long-haul International Capacity, Percentage Entity Registrant Name Entity Registrant Name Other operating special items, net Other Operating Special Charges, Net Other Operating Special Charges, Net Warrants, number of warrant shares of common stock Class Of Warrant Or Right, Number Of Shares Called By Warrants, Authorized Class Of Warrant Or Right, Number Of Shares Called By Warrants, Authorized Other Short-term Revolving Facility Other Short-term Revolving Facility [Member] Other Short-term Revolving Facility Income Tax Authority [Axis] Income Tax Authority [Axis] Cash Cash Beginning balance, before tax Ending balance, before tax AOCI before Tax, Attributable to Parent Capital expenditures, net of aircraft purchase deposit returns Payments to Acquire Productive Assets Other comprehensive loss before 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Income, Interest Variable Rate [Axis] Variable Rate [Axis] AOCI attributable to parent, before tax [Roll Forward] AOCI Before Tax, Attributable To Parent [Roll Forward] AOCI Before Tax, Attributable To Parent [Roll Forward] 5.75% Senior Notes Senior Note 5.75% Matures 2029 [Member] Senior Note 5.75% Matures 2029 Other comprehensive loss before reclassifications, net of tax OCI, before Reclassifications, Net of Tax, Attributable to Parent Operating income (loss) Operating Income (Loss) December 2016 Credit Facilities Credit Facility December 2016 [Member] Credit Facility December 2016 [Member] Operating lease liabilities Operating Lease, Liability, Current Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Variable Rate [Domain] Variable Rate [Domain] Special Items, Net Restructuring and Related Activities Disclosure [Text Block] Equipment purchase deposits Deposits on Flight Equipment AOCI attributable to parent, net of 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debt, fair value Long-term debt, including current maturities Long-term Debt, Fair Value Interest Rate Years Six Through Ten Interest Rate Years Six Through Ten [Member] Interest Rate Years Six Through Ten [Member] Airline Destination [Domain] Airline Destination [Domain] Purchase and retirement of common stock (in shares) Stock Repurchased and Retired During Period, Shares Other investing activities Payments for (Proceeds from) Other Investing Activities Mainline Mainline [Member] NOL carryforward subject to expiration Operating Loss Carryforwards, Subject to Expiration Operating Loss Carryforwards, Subject to Expiration Decrease in domestic capacity in percentage Decrease In Flight Travel Compared to Prior Year, Domestic Capacity, Percentage Decrease In Flight Travel Compared to Prior Year, Domestic Capacity, Percentage Defined benefit plan, contributed amount Defined Benefit Plan, Plan Assets, Contributions by Employer Maximum Maximum [Member] Entity Information [Line Items] Entity Information [Line Items] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Total stockholders’ deficit Beginning balance Ending balance Stockholders' Equity Attributable to Parent NOL carryforwards Operating Loss Carryforwards Common stock, shares issued (in shares) Common Stock, Shares, Issued Pacific Pacific Destination [Member] Interest Rate Scenario [Axis] Interest Rate Scenario [Axis] Interest Rate Scenario [Axis] Existing Terminal Building JFK Airport Upgrade, Existing Terminal Building [Member] JFK Airport Upgrade, Existing Terminal Building Other assets Other Assets, Miscellaneous, Noncurrent Settlement of bankruptcy obligations Other Significant Noncash Transaction Bankruptcy Settlement Obligation Other Significant Noncash Transaction, Bankruptcy Settlement Obligation Treasury stock repurchases and shares withheld for taxes pursuant to employee stock plans Payments for Repurchase of Common Stock Cargo Receivable Facility Cargo Receivable Facility [Member] Cargo Receivable Facility Stockholders’ equity (deficit) Stockholders' Equity Attributable to Parent [Abstract] Components of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Co-branded credit card and other partners Loyalty Program, Co-branded Credit Card And Other Partners [Member] Loyalty Program, Co-branded Credit Card And Other Partners Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Increase in debt instrument face amount for each disbursement received Increase In Debt Instrument Face Amount For Each Installment Disbursed Increase In Debt Instrument Face Amount For Each Installment Disbursed Operating lease liabilities Operating Lease, Liability, Noncurrent Measurement Frequency [Domain] Measurement Frequency [Domain] Debt instrument, face amount Debt Instrument, Face Amount Interest expense, net 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Restricted stock unit awards Restricted Stock Units (RSUs) [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] 3.75% Senior Notes Senior Notes 3.75% Due 2025 [Member] Senior Notes 3.75% Due 2025 [Member] Special items, net Restructuring And Other Expense (Income), Mainline Restructuring And Other Expense (Income), Mainline Income Statement [Abstract] Income Statement [Abstract] Amendment Flag Amendment Flag Fair Value Estimate of Fair Value Measurement [Member] April 2016 Spare Parts Term Loan Facility Spare Parts Credit Facility April 2016 [Member] Spare Parts Credit Facility April 2016 Basis of Presentation and Recent Accounting Pronouncements Basis of Presentation and Significant Accounting Policies [Text Block] Income tax benefit Income Tax Expense (Benefit) Passenger Passenger [Member] Unsecured Debt Unsecured Debt [Member] Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt Equity Components [Axis] Equity Components [Axis] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Investment Type [Axis] Investment Type [Axis] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total current assets Assets, Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Sale of Stock [Domain] Sale of Stock [Domain] Entity File Number Entity File Number Issuance of Warrants Adjustments to Additional Paid in Capital, Warrant Issued Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Summary of Net Receivables (Payables) to Related Parties Schedule of Related Party Transactions [Table Text Block] Less: Current maturities Long-term 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Operating Activities Schedule of Long-Term Debt Schedule of Debt [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Entity Tax Identification Number Entity Tax Identification Number Subsequent Event [Line Items] Subsequent Event [Line Items] Basic EPS: Earnings Per Share, Basic [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in dollars per share) Diluted EPS (in dollars per share) Earnings Per Share, Diluted State State and Local Jurisdiction [Member] Service cost Defined Benefit Plan, Service Cost Project [Axis] Project [Axis] Accounting Standards Update [Extensible List] Accounting Standards Update [Extensible Enumeration] Minimum liquidity Line Of Credit Facility, Covenant Terms, Minimum Aggregate Liquidity Required Line Of Credit Facility, Covenant Terms, Minimum Aggregate Liquidity 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