Entity Common Stock, Shares Outstanding
|
DEI
|
Entity Public Float
|
DEI
|
Accounts Payable, Current
|
US-GAAP
|
Accrual for Taxes Other than Income Taxes, Current
|
US-GAAP
|
Accrued Liabilities, Current
|
US-GAAP
|
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
|
US-GAAP
|
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax
|
US-GAAP
|
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
|
US-GAAP
|
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax
|
US-GAAP
|
Accumulated Other Comprehensive Income (Loss), Net of Tax
|
US-GAAP
|
Additional Paid in Capital, Common Stock
|
US-GAAP
|
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
|
US-GAAP
|
Adjustments to Additional Paid in Capital, Warrant Issued
|
US-GAAP
|
Advertising Expense
|
US-GAAP
|
Aircraft Maintenance, Materials, and Repairs
|
US-GAAP
|
Aircraft Rental
|
US-GAAP
|
Share-based Payment Arrangement, Expense
|
US-GAAP
|
Accounts Receivable, Allowance for Credit Loss, Current
|
US-GAAP
|
Accounts Receivable, Allowance for Credit Loss, Writeoff
|
US-GAAP
|
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax
|
US-GAAP
|
Asset Impairment Charges
|
US-GAAP
|
Assets
|
US-GAAP
|
Assets, Current
|
US-GAAP
|
Assets Held-for-sale, Long Lived, Fair Value Disclosure
|
US-GAAP
|
Debt Securities, Available-for-sale, Amortized Cost
|
US-GAAP
|
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax
|
US-GAAP
|
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax
|
US-GAAP
|
Available-for-sale Securities, Amortized Cost Basis
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
|
US-GAAP
|
Available-for-sale Securities, Current
|
US-GAAP
|
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value
|
US-GAAP
|
Debt Securities, Available-for-sale
|
US-GAAP
|
Available-for-sale Securities, Fair Value Disclosure (Deprecated 2013-01-31)
|
US-GAAP
|
Available-for-sale Securities, Gross Realized Gains
|
US-GAAP
|
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds (Deprecated 2018-01-31)
|
US-GAAP
|
Available-for-sale Securities, Gross Realized Losses
|
US-GAAP
|
Available-for-sale Securities, Gross Unrealized Gain (Loss) (Deprecated 2013-01-31)
|
US-GAAP
|
Available-for-sale Securities, Gross Unrealized Gain
|
US-GAAP
|
Available-for-sale Securities, Gross Unrealized Loss
|
US-GAAP
|
Available-for-sale Securities, Gross Unrealized Losses (Deprecated 2013-01-31)
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses (Deprecated 2012-01-31)
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses (Deprecated 2013-01-31)
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses (Deprecated 2012-01-31)
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses (Deprecated 2013-01-31)
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses (Deprecated 2012-01-31)
|
US-GAAP
|
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses (Deprecated 2013-01-31)
|
US-GAAP
|
Available-for-sale Securities, Gross Unrealized Gains (Deprecated 2013-01-31)
|
US-GAAP
|
Bank Overdrafts
|
US-GAAP
|
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Remaining Adjustments
|
US-GAAP
|
Business Combination, Acquisition Related Costs
|
US-GAAP
|
Capital Expenditures Incurred but Not yet Paid
|
US-GAAP
|
Capital Lease Obligations, Current
|
US-GAAP
|
Cargo and Freight Revenue (Deprecated 2018-01-31)
|
US-GAAP
|
Cash
|
US-GAAP
|
Cash and Cash Equivalents, at Carrying Value
|
US-GAAP
|
Cash and Cash Equivalents, Period Increase (Decrease)
|
US-GAAP
|
Cash, Cash Equivalents, and Short-term Investments
|
US-GAAP
|
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
|
US-GAAP
|
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect
|
US-GAAP
|
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
|
US-GAAP
|
Cash Equivalents, at Carrying Value
|
US-GAAP
|
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right
|
US-GAAP
|
Class of Warrant or Right, Outstanding
|
US-GAAP
|
Common Stock, Dividends, Per Share, Cash Paid
|
US-GAAP
|
Common Stock, Dividends, Per Share, Declared
|
US-GAAP
|
Common Stock, Par or Stated Value Per Share
|
US-GAAP
|
Common Stock, Shares Authorized
|
US-GAAP
|
Common Stock, Shares, Issued
|
US-GAAP
|
Common Stock, Shares, Outstanding
|
US-GAAP
|
Common Stock, Value, Issued
|
US-GAAP
|
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
|
US-GAAP
|
Contract Revenue Cost (Deprecated 2018-01-31)
|
US-GAAP
|
Contract with Customer, Liability, Current
|
US-GAAP
|
Cost of Services, Catering
|
US-GAAP
|
Costs and Expenses
|
US-GAAP
|
Credit Card Receivables
|
US-GAAP
|
Cumulative Effect of New Accounting Principle in Period of Adoption (Deprecated 2020-01-31)
|
US-GAAP
|
Current Federal Tax Expense (Benefit)
|
US-GAAP
|
Current Income Tax Expense (Benefit)
|
US-GAAP
|
Current State and Local Tax Expense (Benefit)
|
US-GAAP
|
Debt, Current
|
US-GAAP
|
Long-term Debt, Gross
|
US-GAAP
|
Debt Instrument, Increase (Decrease), Net
|
US-GAAP
|
Debt Instrument, Periodic Payment
|
US-GAAP
|
Debt, Weighted Average Interest Rate
|
US-GAAP
|
Deferred Air Traffic Revenue, Current
|
US-GAAP
|
Deferred Costs, Noncurrent
|
US-GAAP
|
Deferred Federal Income Tax Expense (Benefit)
|
US-GAAP
|
Debt Issuance Costs, Net
|
US-GAAP
|
Deferred Income Tax Expense (Benefit)
|
US-GAAP
|
Deferred Tax Liabilities, Gross
|
US-GAAP
|
Deferred Income Tax Liabilities, Net
|
US-GAAP
|
Deferred Revenue
|
US-GAAP
|
Deferred Revenue, Current
|
US-GAAP
|
Deferred Revenue, Noncurrent
|
US-GAAP
|
Deferred Revenue, Refund Payments
|
US-GAAP
|
Deferred State and Local Income Tax Expense (Benefit)
|
US-GAAP
|
Deferred Tax and Other Liabilities, Noncurrent
|
US-GAAP
|
Deferred Tax Assets, Deferred Income
|
US-GAAP
|
Deferred Tax Assets, Derivative Instruments
|
US-GAAP
|
Deferred Tax Assets, Gross
|
US-GAAP
|
Deferred Tax Assets, Inventory
|
US-GAAP
|
Deferred Tax Assets, Net
|
US-GAAP
|
Deferred Tax Assets, Net, Current
|
US-GAAP
|
Deferred Tax Assets, Net, Noncurrent
|
US-GAAP
|
Deferred Tax Assets, Net of Valuation Allowance, Current
|
US-GAAP
|
Deferred Tax Assets, Operating Loss Carryforwards
|
US-GAAP
|
Deferred Tax Assets, Other
|
US-GAAP
|
Deferred Tax Assets, Tax Credit Carryforwards
|
US-GAAP
|
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits
|
US-GAAP
|
Deferred Tax Assets, Valuation Allowance
|
US-GAAP
|
Deferred Tax Liabilities, Net
|
US-GAAP
|
Deferred Tax Liabilities, Derivatives
|
US-GAAP
|
Deferred Tax Liabilities, Intangible Assets
|
US-GAAP
|
Deferred Tax Liabilities, Net, Noncurrent
|
US-GAAP
|
Deferred Tax Liabilities, Other
|
US-GAAP
|
Deferred Tax Liabilities, Other Finite-Lived Assets
|
US-GAAP
|
Deferred Tax Liabilities, Property, Plant and Equipment
|
US-GAAP
|
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
|
US-GAAP
|
Defined Benefit Plan, Plan Assets, Contributions by Employer
|
US-GAAP
|
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year (Deprecated 2013-01-31)
|
US-GAAP
|
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation
|
US-GAAP
|
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets
|
US-GAAP
|
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation
|
US-GAAP
|
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits
|
US-GAAP
|
Defined Contribution Plan, Cost
|
US-GAAP
|
Deposits on Flight Equipment
|
US-GAAP
|
Depreciation, Depletion and Amortization
|
US-GAAP
|
Derivative Asset, Current
|
US-GAAP
|
Derivative Asset, Noncurrent
|
US-GAAP
|
Derivative, Collateral, Right to Reclaim Cash
|
US-GAAP
|
Derivative Instruments and Hedges, Assets
|
US-GAAP
|
Derivative Instruments and Hedges, Noncurrent
|
US-GAAP
|
Dividends, Cash
|
US-GAAP
|
Earnings Per Share, Basic
|
US-GAAP
|
Earnings Per Share, Diluted
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, Percent
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
|
US-GAAP
|
Employee-related Liabilities, Current
|
US-GAAP
|
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
|
US-GAAP
|
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (Deprecated 2012-01-31)
|
US-GAAP
|
Share-based Payment Arrangement, Expense, Tax Benefit
|
US-GAAP
|
Energy Related Inventory
|
US-GAAP
|
Fair Value, Level 1 to level 2 Transfers, Amount (Deprecated 2012-01-31)
|
US-GAAP
|
Fair Value, Level 2 to level 1 Transfers, Amount (Deprecated 2012-01-31)
|
US-GAAP
|
Flight Equipment, Gross
|
US-GAAP
|
Food and Beverage, Cost of Sales (Deprecated 2018-01-31)
|
US-GAAP
|
Fuel Costs
|
US-GAAP
|
Fuel Costs, Gross of Hedging
|
US-GAAP
|
Gain (Loss) on Hedging Activity
|
US-GAAP
|
Gain (Loss) Related to Litigation Settlement
|
US-GAAP
|
Goodwill
|
US-GAAP
|
Impairment of Intangible Assets, Finite-lived
|
US-GAAP
|
Impairment of Long-Lived Assets Held-for-use
|
US-GAAP
|
Impairment of Long-Lived Assets to be Disposed of
|
US-GAAP
|
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
|
US-GAAP
|
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
|
US-GAAP
|
Income Tax Examination, Penalties and Interest Accrued
|
US-GAAP
|
Income Tax Examination, Penalties and Interest Expense
|
US-GAAP
|
Income Tax Expense (Benefit)
|
US-GAAP
|
Income Tax Expense (Benefit), Continuing Operations (Deprecated 2013-01-31)
|
US-GAAP
|
Income Taxes Paid, Net
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount
|
US-GAAP
|
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
|
US-GAAP
|
Increase (Decrease) in Accounts Receivable
|
US-GAAP
|
Increase (Decrease) in Air Traffic Liability (Deprecated 2011-01-31)
|
US-GAAP
|
Increase (Decrease) in Air Traffic Liability
|
US-GAAP
|
Increase (Decrease) in Contract with Customer, Liability
|
US-GAAP
|
Increase (Decrease) in Deferred Income Taxes
|
US-GAAP
|
Increase (Decrease) in Deferred Revenue
|
US-GAAP
|
Increase (Decrease) in Other Accrued Liabilities
|
US-GAAP
|
Increase (Decrease) in Other Current Liabilities
|
US-GAAP
|
Increase (Decrease) in Other Noncurrent Liabilities
|
US-GAAP
|
Increase (Decrease) in Other Operating Assets and Liabilities, Net
|
US-GAAP
|
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits
|
US-GAAP
|
Increase (Decrease) in Obligation, Pension Benefits
|
US-GAAP
|
Increase (Decrease) in Prepaid Expense and Other Assets
|
US-GAAP
|
Increase (Decrease) in Receivables
|
US-GAAP
|
Intangible Assets, Net (Excluding Goodwill)
|
US-GAAP
|
Interest Costs Capitalized
|
US-GAAP
|
Interest Costs Capitalized Adjustment
|
US-GAAP
|
Interest Costs Incurred
|
US-GAAP
|
Interest Expense
|
US-GAAP
|
Interest Paid, Capitalized, Investing Activities
|
US-GAAP
|
Interest Paid, Excluding Capitalized Interest, Operating Activities
|
US-GAAP
|
Inventory, Net
|
US-GAAP
|
Inventory Valuation Reserves
|
US-GAAP
|
Inventory Write-down
|
US-GAAP
|
Investment Income, Interest
|
US-GAAP
|
Labor and Related Expense
|
US-GAAP
|
Landing Fees and Other Rentals
|
US-GAAP
|
Operating Leases, Rent Expense
|
US-GAAP
|
Lease, Cost
|
US-GAAP
|
Lessor, Operating Lease, Lease Not yet Commenced, Assumption and Judgment, Value of Underlying Asset, Amount
|
US-GAAP
|
Liabilities and Equity
|
US-GAAP
|
Liabilities, Current
|
US-GAAP
|
Liabilities, Noncurrent
|
US-GAAP
|
Liabilities, Other than Long-term Debt, Noncurrent
|
US-GAAP
|
Line of Credit Facility, Current Borrowing Capacity
|
US-GAAP
|
Line of Credit Facility, Maximum Borrowing Capacity
|
US-GAAP
|
Line of Credit Facility, Periodic Payment, Principal
|
US-GAAP
|
Long-term Debt
|
US-GAAP
|
Long-term Debt and Lease Obligation
|
US-GAAP
|
Long-term Debt and Lease Obligation, Current
|
US-GAAP
|
Long-term Debt, Current Maturities
|
US-GAAP
|
Long-Term Debt, Maturity, after Year Five
|
US-GAAP
|
Long-Term Debt, Maturity, Year One
|
US-GAAP
|
Long-Term Debt, Maturity, Year Five
|
US-GAAP
|
Long-Term Debt, Maturity, Year Four
|
US-GAAP
|
Long-Term Debt, Maturity, Year Three
|
US-GAAP
|
Long-Term Debt, Maturity, Year Two
|
US-GAAP
|
Long-Term Debt, Maturity, Remainder of Fiscal Year
|
US-GAAP
|
Long-term Debt, Excluding Current Maturities
|
US-GAAP
|
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate
|
US-GAAP
|
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate
|
US-GAAP
|
Long-term Debt, Weighted Average Interest Rate, at Point in Time
|
US-GAAP
|
Loss Contingency Accrual
|
US-GAAP
|
Loss Contingency, Damages Awarded, Value
|
US-GAAP
|
Marketable Securities, Current
|
US-GAAP
|
Money Market Funds, at Carrying Value
|
US-GAAP
|
Net Cash Provided by (Used in) Financing Activities
|
US-GAAP
|
Net Cash Provided by (Used in) Investing Activities
|
US-GAAP
|
Net Cash Provided by (Used in) Operating Activities
|
US-GAAP
|
Net Income (Loss) Attributable to Parent
|
US-GAAP
|
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results (Deprecated 2020-01-31)
|
US-GAAP
|
Noncash or Part Noncash Acquisition, Other Assets Acquired
|
US-GAAP
|
Nonoperating Income (Expense)
|
US-GAAP
|
Number of Operating Segments
|
US-GAAP
|
Operating Expenses
|
US-GAAP
|
Operating Income (Loss)
|
US-GAAP
|
Operating Lease, Expense
|
US-GAAP
|
Operating Lease, Impairment Loss
|
US-GAAP
|
Operating Lease, Liability, Current
|
US-GAAP
|
Operating Lease, Liability, Noncurrent
|
US-GAAP
|
Operating Lease, Payments
|
US-GAAP
|
Operating Lease, Right-of-Use Asset
|
US-GAAP
|
Operating Loss Carryforwards
|
US-GAAP
|
Operating Loss Carryforwards, Valuation Allowance
|
US-GAAP
|
Other Accrued Liabilities, Current
|
US-GAAP
|
Other Assets
|
US-GAAP
|
Other Assets, Current
|
US-GAAP
|
Other Assets, Miscellaneous, Noncurrent
|
US-GAAP
|
Other Assets, Noncurrent
|
US-GAAP
|
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect (Deprecated 2012-01-31)
|
US-GAAP
|
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax
|
US-GAAP
|
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent
|
US-GAAP
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Net of Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Net of Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax
|
US-GAAP
|
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
|
US-GAAP
|
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax (Deprecated 2013-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax
|
US-GAAP
|
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax (Deprecated 2013-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax (Deprecated 2012-01-31)
|
US-GAAP
|
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
|
US-GAAP
|
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax
|
US-GAAP
|
Other Cost and Expense, Operating
|
US-GAAP
|
Other Labor-related Expenses
|
US-GAAP
|
Other Liabilities
|
US-GAAP
|
Other Liabilities, Noncurrent
|
US-GAAP
|
Other Noncash Expense
|
US-GAAP
|
Other Nonoperating Income (Expense)
|
US-GAAP
|
Other Nonrecurring Expense
|
US-GAAP
|
Other Operating Activities, Cash Flow Statement
|
US-GAAP
|
Other Prepaid Expense, Current
|
US-GAAP
|
Other Receivables, Gross, Current
|
US-GAAP
|
Other Revenue, Net (Deprecated 2018-01-31)
|
US-GAAP
|
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities
|
US-GAAP
|
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities
|
US-GAAP
|
Passenger Revenue (Deprecated 2018-01-31)
|
US-GAAP
|
Passenger Revenue, Mainline (Deprecated 2018-01-31)
|
US-GAAP
|
Passenger Revenue, Regional (Deprecated 2018-01-31)
|
US-GAAP
|
Payments for Construction in Process
|
US-GAAP
|
Payments for Flight Equipment
|
US-GAAP
|
Payments for (Proceeds from) Hedge, Investing Activities
|
US-GAAP
|
Payments for (Proceeds from) Other Investing Activities
|
US-GAAP
|
Payments for Repurchase of Common Stock
|
US-GAAP
|
Payments for Restructuring
|
US-GAAP
|
Payments of Dividends
|
US-GAAP
|
Payments to Acquire Businesses, Net of Cash Acquired
|
US-GAAP
|
Payments to Acquire Marketable Securities
|
US-GAAP
|
Payments to Acquire Other Productive Assets
|
US-GAAP
|
Payments to Acquire Other Property, Plant, and Equipment
|
US-GAAP
|
Payments to Acquire Property, Plant, and Equipment
|
US-GAAP
|
Payment for Pension and Other Postretirement Benefits
|
US-GAAP
|
Liability, Defined Benefit Plan, Noncurrent
|
US-GAAP
|
Payment for Pension Benefits
|
US-GAAP
|
Preferred Stock, Par or Stated Value Per Share
|
US-GAAP
|
Preferred Stock, Shares Authorized
|
US-GAAP
|
Preferred Stock, Shares Issued
|
US-GAAP
|
Preferred Stock, Shares Outstanding
|
US-GAAP
|
Preferred Stock, Value, Issued
|
US-GAAP
|
Prepaid Expense and Other Assets
|
US-GAAP
|
Prepaid Expense and Other Assets, Current
|
US-GAAP
|
Prepaid Expense, Noncurrent
|
US-GAAP
|
Prepaid Rent
|
US-GAAP
|
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months
|
US-GAAP
|
Proceeds from Issuance of Common Stock
|
US-GAAP
|
Proceeds from Issuance of Debt
|
US-GAAP
|
Proceeds from Issuance of Long-term Debt
|
US-GAAP
|
Proceeds from Issuance of Secured Debt
|
US-GAAP
|
Proceeds from Lines of Credit
|
US-GAAP
|
Proceeds from (Payments for) Other Financing Activities
|
US-GAAP
|
Proceeds from Sale and Maturity of Marketable Securities
|
US-GAAP
|
Proceeds from Sale of Productive Assets
|
US-GAAP
|
Professional and Contract Services Expense
|
US-GAAP
|
Property, Plant and Equipment, Gross
|
US-GAAP
|
Property, Plant and Equipment, Net
|
US-GAAP
|
Property, Plant and Equipment, Other, Gross
|
US-GAAP
|
Property, Plant and Equipment, Other, Net
|
US-GAAP
|
Receivables, Net, Current
|
US-GAAP
|
Repayments of Debt
|
US-GAAP
|
Repayments of Lines of Credit
|
US-GAAP
|
Repayments of Long-term Debt
|
US-GAAP
|
Repayments of Related Party Debt
|
US-GAAP
|
Restricted Cash and Cash Equivalents, Current
|
US-GAAP
|
Restricted Cash and Investments, Current
|
US-GAAP
|
Restricted Cash and Investments, Noncurrent
|
US-GAAP
|
Restricted Investments
|
US-GAAP
|
Restructuring and Related Cost, Number of Positions Eliminated
|
US-GAAP
|
Restructuring Charges
|
US-GAAP
|
Restructuring Reserve
|
US-GAAP
|
Restructuring, Settlement and Impairment Provisions
|
US-GAAP
|
Retained Earnings (Accumulated Deficit)
|
US-GAAP
|
Revenue from Contract with Customer, Excluding Assessed Tax
|
US-GAAP
|
Revenue from Related Parties
|
US-GAAP
|
Revenues
|
US-GAAP
|
Segment Reporting Information, Intersegment Revenue (Deprecated 2013-01-31)
|
US-GAAP
|
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
|
US-GAAP
|
Sale Leaseback Transaction, Gross Proceeds (Deprecated 2014-01-31)
|
US-GAAP
|
Sale Leaseback Transaction, Historical Cost
|
US-GAAP
|
Sale Leaseback Transaction, Net Proceeds (Deprecated 2014-01-31)
|
US-GAAP
|
Sale Leaseback Transaction, Net Proceeds, Financing Activities
|
US-GAAP
|
Revenue, Net (Deprecated 2018-01-31)
|
US-GAAP
|
Selling Expense
|
US-GAAP
|
Severance Costs (Deprecated 2013-01-31)
|
US-GAAP
|
Share-based Payment Arrangement, Noncash Expense
|
US-GAAP
|
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost (Deprecated 2012-01-31)
|
US-GAAP
|
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate
|
US-GAAP
|
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
|
US-GAAP
|
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
|
US-GAAP
|
Stockholders' Equity Attributable to Parent
|
US-GAAP
|
Stock Issued During Period, Value, Employee Stock Ownership Plan
|
US-GAAP
|
Stock Issued During Period, Value, Employee Stock Purchase Plan
|
US-GAAP
|
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture
|
US-GAAP
|
Stock Issued During Period, Value, Treasury Stock Reissued
|
US-GAAP
|
Stock Repurchased During Period, Shares
|
US-GAAP
|
Stock Repurchased During Period, Value
|
US-GAAP
|
Stock Repurchase Program, Authorized Amount (Deprecated 2014-01-31)
|
US-GAAP
|
Sublease Income
|
US-GAAP
|
Tax Adjustments, Settlements, and Unusual Provisions
|
US-GAAP
|
Treasury Stock, Retired, Cost Method, Amount
|
US-GAAP
|
Treasury Stock, Shares
|
US-GAAP
|
Treasury Stock, Shares, Retired
|
US-GAAP
|
Treasury Stock, Value
|
US-GAAP
|
Treasury Stock, Value, Retired, Cost Method (Deprecated 2011-01-31)
|
US-GAAP
|
Unrealized Gain (Loss) on Derivatives
|
US-GAAP
|
Unrecognized Tax Benefits
|
US-GAAP
|
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
|
US-GAAP
|
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
|
US-GAAP
|
Unrecognized Tax Benefits, Increase Resulting from Acquisition
|
US-GAAP
|
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
|
US-GAAP
|
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
|
US-GAAP
|
Unrecognized Tax Benefits, Period Increase (Decrease)
|
US-GAAP
|
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
|
US-GAAP
|
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
|
US-GAAP
|
Weighted Average Number of Shares Outstanding, Diluted
|
US-GAAP
|
Weighted Average Number of Shares Outstanding, Basic
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost
|
US-GAAP
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights
|
US-GAAP
|
Income Taxes Paid
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
|
US-GAAP
|
Marketable Securities
|
US-GAAP
|
Other Asset Impairment Charges
|
US-GAAP
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
|
US-GAAP
|
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax
|
US-GAAP
|
Restructuring and Related Cost, Expected Cost Remaining
|
US-GAAP
|
Taxes Payable
|
US-GAAP
|
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
|
US-GAAP
|
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
|
US-GAAP
|
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required
|
US-GAAP
|
Debt Securities Available For Sale And Held To Maturity Fair Value
|
US-GAAP
|
Proceeds from Income Tax Refunds
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount
|
US-GAAP
|
Effective Income Tax Rate Reconciliation, Tax Credit, Amount
|
US-GAAP
|
Loss Contingency, Loss in Period
|
US-GAAP
|
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
|
US-GAAP
|
Prepaid Expense
|
US-GAAP
|
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value
|
US-GAAP
|
Class of Warrant or Right, Exercise Price of Warrants or Rights
|
US-GAAP
|
Treasury Stock, Common, Shares
|
US-GAAP
|
AOCI Tax, Attributable to Parent
|
US-GAAP
|
Finance Lease, Liability
|
US-GAAP
|
Finance Lease, Right-of-Use Asset, after Accumulated Amortization
|
US-GAAP
|
Noncash or Part Noncash Acquisition, Fixed Assets Acquired
|
US-GAAP
|
Reclassification from AOCI, Current Period, Tax
|
US-GAAP
|
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
|
US-GAAP
|
Assets Held-for-sale, Not Part of Disposal Group, Current
|
US-GAAP
|
Prepaid Expense, Current
|
US-GAAP
|
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year
|
US-GAAP
|
Finance Lease, Principal Payments
|
US-GAAP
|
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
|
US-GAAP
|
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
|
US-GAAP
|
Stock Repurchase Program, Remaining Authorized Repurchase Amount
|
US-GAAP
|
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants
|
US-GAAP
|
Asset Acquisition Consideration Transferred
|
US-GAAP
|
Asset Acquisition Consideration Transferred Contingent Consideration
|
US-GAAP
|
Business Acquisition, Pro Forma Net Income (Loss)
|
US-GAAP
|
Business Acquisition, Pro Forma Revenue
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
|
US-GAAP
|
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
|
US-GAAP
|
Finite-Lived Intangible Assets, Gross
|
US-GAAP
|
Goodwill, Acquired During Period
|
US-GAAP
|
Payments for Merger Related Costs
|
US-GAAP
|
Payments to Acquire Businesses, Gross
|
US-GAAP
|
Proceeds from Secured Notes Payable
|
US-GAAP
|
Restricted Cash
|
US-GAAP
|
Amortization of Intangible Assets
|
US-GAAP
|
Capitalized Computer Software, Amortization
|
US-GAAP
|
Capitalized Computer Software, Net
|
US-GAAP
|
Debt Securities Available For Sale Amortized Cost After Allowance For Credit Loss
|
US-GAAP
|
Finance Lease, Interest Expense
|
US-GAAP
|
Finance Lease, Liability, Current
|
US-GAAP
|
Finance Lease, Liability, Noncurrent
|
US-GAAP
|
Finance Lease, Right-of-Use Asset, Amortization
|
US-GAAP
|
Finance Lease, Right-of-Use Asset, before Accumulated Amortization
|
US-GAAP
|
Finance Lease, Weighted Average Discount Rate, Percent
|
US-GAAP
|
Finite-Lived Intangible Assets, Accumulated Amortization
|
US-GAAP
|
Finite-Lived Intangible Asset, Expected Amortization, Year One
|
US-GAAP
|
Finite-Lived Intangible Asset, Expected Amortization, Year Five
|
US-GAAP
|
Finite-Lived Intangible Asset, Expected Amortization, Year Four
|
US-GAAP
|
Finite-Lived Intangible Asset, Expected Amortization, Year Three
|
US-GAAP
|
Finite-Lived Intangible Asset, Expected Amortization, Year Two
|
US-GAAP
|
Intangible Assets, Gross (Excluding Goodwill)
|
US-GAAP
|
Interest Expense Nonoperating
|
US-GAAP
|
Lease Income
|
US-GAAP
|
Number of Reportable Segments
|
US-GAAP
|
Operating Lease, Cost
|
US-GAAP
|
Operating Lease, Weighted Average Discount Rate, Percent
|
US-GAAP
|
Payment for Debt Extinguishment or Debt Prepayment Cost
|
US-GAAP
|
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale
|
US-GAAP
|
Segment Expenditure Addition To Long Lived Assets
|
US-GAAP
|