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 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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Percentage Bearing Variable Interest, Percentage 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 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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 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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, value 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 Accumulated other comprehensive loss Beginning balance, net of tax Ending balance, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Payments for salary and medical costs Payments For Restructuring, Salary And Medical Costs Payments For Restructuring, Salary And Medical Costs Regional expenses Airline, 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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 Interest expense on 6.50% convertible senior notes Interest on Convertible Debt, Net of Tax 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 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Restricted stock unit awards Restricted Stock Units (RSUs) [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating lease conversion to finance lease Other Significant Noncash Transaction, Operating Lease Conversion To Finance Lease Other Significant Noncash Transaction, Operating Lease Conversion To Finance Lease 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 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to Parent [Member] Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] 5.50% Senior Notes Senior Note 5.50% Matures 2026 [Member] Senior Note 5.50% Matures 2026 Weighted average shares outstanding (in thousands): Weighted Average Number of Shares Outstanding, Diluted [Abstract] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Equipment Loans and Other Notes Payable Equipment Loans and Other Notes Payable Maturing 2029 Through 2032 [Member] Equipment Loans and Other Notes Payable Maturing 2029 Through 2032 [Member] China Southern Airlines China Southern Airlines Company Limited [Member] China Southern Airlines [Member] Other PSP3 Financial Assistance, CARES Act Other Payroll Support Program Three Financial Assistance, CARES Act [Member] Other Payroll Support Program Three Financial Assistance, CARES Act Other Other 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Republic Airways Holdings, Inc. [Member] Republic Airways Holdings, Inc. 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