CARES Act, Class of Warrant or Right, Expected

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- Definition

CARES Act, Payroll Support Program, Grant

+ References

No definition available.

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- Definition

CARES Act, Payroll Support Program, Total Payment

+ References

No definition available.

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- Definition

CARES Act, Secured Loans, Eligibility Amount

+ References

No definition available.

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- Definition

Debt Instrument, Covenant, Collateral Coverage Ratio, Minimum

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No definition available.

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- Definition

Debt Instrument, Net Amount

+ References

No definition available.

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- Definition

Finance Lease, Liability, to be Paid, after Year Four

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No definition available.

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- Definition

Finance Lease, Number of Aircraft Leases

+ References

No definition available.

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- Definition

Number of new aircraft held as security.

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No definition available.

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- Definition

Number of Aircraft, Secured Debt Transactions

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No definition available.

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- Definition

The carrying amount, as of the date of the latest financial statement presented, of flight equipment which are owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

+ References

No definition available.

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- Definition

Proceeds from Sale Leaseback Transactions

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No definition available.

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- Definition

Sale Leaseback Cash Proceeds Financing

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No definition available.

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- Definition

Sale Leaseback Cash Proceeds, Investing

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No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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- Definition

Number of warrants or rights outstanding.

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No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount, after accumulated amortization, of debt premium.

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.

+ References

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- Definition

Amount, after accumulated amortization, of right-of-use asset from finance lease.

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Amount of accumulated amortization of right-of-use asset from finance lease.

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Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of the fees associated with providing collateral for the credit facility.

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No definition available.

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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- Definition

The effective interest rate at the end of the reporting period.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

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- Definition

Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

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Long-term Debt, Short-term Borrowings, and Finance Lease Obligations - Narrative (Details)				1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($) shares	Sep. 29, 2020 USD ($) $ / shares shares	Apr. 23, 2020 USD ($) $ / shares shares	Mar. 31, 2020	Sep. 30, 2020 USD ($) shares	Dec. 31, 2020 USD ($) aircraft $ / shares shares	Dec. 31, 2019 USD ($) airbus aircraft	Dec. 31, 2018 USD ($) airbus	Jan. 15, 2021 $ / shares shares	Nov. 03, 2020 USD ($)	Aug. 31, 2020 USD ($)	Jun. 17, 2020 USD ($)	Apr. 22, 2020 USD ($)	Nov. 30, 2019 USD ($) aircraft	Aug. 31, 2019 USD ($)	Mar. 30, 2014 USD ($) aircraft	Apr. 30, 2013 USD ($)
Debt Instrument [Line Items]
CARES act, secured loans, eligibility amount						$ 1,900,000,000				$ 1,900,000,000
CARES act, class of warrant or right, expected (in shares) \| shares						20,500,000
Class of warrant or right, outstanding (in shares) \| shares	85,540	1,200,000	2,600,000		85,540	85,540
Class of warrant or right, exercise price of warrants or rights (in dollars per share) \| $ / shares		$ 9.50	$ 9.50			$ 9.50
Remaining borrowing capacity						$ 1,800,000,000
Line of credit facility, current borrowing capacity						550,000,000
Proceeds from sale leaseback transactions						563,000,000
Proceeds from sale-leaseback transactions						354,000,000	$ 0	$ 0
Proceeds from sale-leaseback transactions						209,000,000	0	0
Losses on sale-leaseback transactions						(106,000,000)	0	0
Finance lease assets						131,000,000	171,000,000
Finance lease, right-of-use asset, accumulated amortization						54,000,000	80,000,000
2021						40,000,000
2022						11,000,000
2023						11,000,000
2024						5,000,000
Finance lease, liability, undiscounted excess amount						4,000,000
Present value of future minimum lease payment						63,000,000	89,000,000
Finance lease liabilities						37,000,000	31,000,000
Finance lease liabilities						26,000,000	58,000,000
CARES act, payroll support program, total payment	$ 27,000,000		$ 936,000,000		$ 27,000,000	963,000,000
CARES act, payroll support program, grant	19,000,000		685,000,000		19,000,000	704,000,000
Pledged assets not separately reported flight equipment						6,900,000,000
Interest paid, including capitalized interest, operating and investing activities						$ 128,000,000	$ 62,000,000	59,000,000
Term loan percentage				0.25%
Subsequent Event
Debt Instrument [Line Items]
Class of warrant or right, outstanding (in shares) \| shares									316,583
Class of warrant or right, exercise price of warrants or rights (in dollars per share) \| $ / shares									$ 14.43
A-320-200
Debt Instrument [Line Items]
Finance lease, number of aircraft leases \| aircraft						2	4
A-321-200
Debt Instrument [Line Items]
Finance lease, number of aircraft leases \| aircraft						2	2
A-320 and A-321
Debt Instrument [Line Items]
Finance lease assets						$ 188,000,000	$ 250,000,000
2021						40,000,000
2022						11,000,000
2023						11,000,000
2024						5,000,000
Thereafter						0
Fixed rate enhanced equipment notes, due through 2023
Debt Instrument [Line Items]
Debt instrument, face amount																$ 226,000,000
Fixed rate equipment notes, due through 2028
Debt Instrument [Line Items]
Debt instrument, face amount							$ 219,000,000	567,000,000
Floating rate equipment notes, due through 2028
Debt Instrument [Line Items]
Debt instrument, face amount								$ 120,000,000
Fixed rate specialty bonds, due through 2036
Debt Instrument [Line Items]
Debt instrument, face amount																	$ 42,000,000
Debt instrument, net amount																	43,000,000
Debt instrument, unamortized premium																	$ 1,000,000
Long-term Debt
Debt Instrument [Line Items]
Debt instrument, face amount						$ 923,000,000
Long-term Debt \| Airbus A321
Debt Instrument [Line Items]
Number of aircraft, secured debt transactions						49
Long-term Debt \| Fixed rate enhanced equipment notes, 2020-1A and B
Debt Instrument [Line Items]
Debt instrument, face amount											$ 808,000,000			$ 772,000,000
Long-term Debt \| 2019-1 Series B, due through 2027
Debt Instrument [Line Items]
Debt instrument, face amount											$ 115,000,000
Debt instrument, interest rate, stated percentage											8.00%
Long-term Debt \| 2019-1 Series B, due through 2027 \| Airbus A321
Debt Instrument [Line Items]
Number of aircraft, secured debt transactions											24			25
Long-term Debt \| 2020-1 Series A, due through 2032
Debt Instrument [Line Items]
Debt instrument, face amount											$ 636,000,000			$ 589,000,000
Debt instrument, interest rate, stated percentage											4.00%			2.75%
Long-term Debt \| 2020-1 Series B, due through 2028
Debt Instrument [Line Items]
Debt instrument, face amount											$ 172,000,000			$ 183,000,000
Debt instrument, interest rate, stated percentage											7.75%			2.95%
Secured Debt \| Fixed rate enhanced equipment notes, due through 2023 \| A-320-200
Debt Instrument [Line Items]
Number of new aircraft held as security \| aircraft																14
Secured Debt \| Fixed rate equipment notes, due through 2028 \| A-320
Debt Instrument [Line Items]
Number of new aircraft held as security \| airbus							10	14
Secured Debt \| Fixed rate equipment notes, due through 2028 \| A-321
Debt Instrument [Line Items]
Number of new aircraft held as security \| airbus							2	10
Secured Debt \| Floating rate equipment notes, due through 2028 \| A-320
Debt Instrument [Line Items]
Number of new aircraft held as security \| airbus								6
Secured Debt \| Floating rate equipment notes, due through 2028 \| A-321
Debt Instrument [Line Items]
Number of new aircraft held as security \| airbus								1
Citibank \| Line of Credit \| Citibank line of credit, due through 2023
Debt Instrument [Line Items]
Line of credit, current						$ 550,000,000							$ 550,000,000
Citibank \| Line of Credit \| Citibank line of credit, due through 2023 \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Line of credit facility, interest rate at period end						2.20%
US Department of Treasury \| Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 8,000,000		$ 251,000,000		$ 8,000,000
Debt instrument, interest rate, stated percentage			1.00%
US Department of Treasury \| Long-term Debt \| Secured CARES Act Loan, due through 2025
Debt Instrument [Line Items]
Debt instrument, face amount		$ 115,000,000				$ 115,000,000
Line of credit facility, collateral fees, amount						550,000,000
Minimum collateral coverage ratio		1.6
US Department of Treasury \| Long-term Debt \| Secured CARES Act Loan, due through 2025 \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.75%
Morgan Stanley
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity						200,000,000
Morgan Stanley \| Short-term Debt
Debt Instrument [Line Items]
Debt instrument, face amount						1,000,000,000.0
Revolving Credit Facility and Letter of Credit Facility \| Morgan Stanley \| Line of Credit
Debt Instrument [Line Items]
Long-term line of credit						$ 0	$ 0
Barclays \| Long-term Debt \| Floating rate term loan credit facility, due through 2024
Debt Instrument [Line Items]
Debt instrument, face amount												$ 750,000,000
Barclays \| Long-term Debt \| Floating rate term loan credit facility, due through 2024 \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage						6.25%
Morgan Stanley \| Short-term Debt
Debt Instrument [Line Items]
Debt instrument, face amount						$ 1,000,000,000
Debt instrument term				364 days
Minimum \| US Department of Treasury \| Long-term Debt \| Secured CARES Act Loan, due through 2025
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.00%
Minimum \| Revolving Credit Facility and Letter of Credit Facility \| Citibank \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity															$ 125,000,000
Maximum \| US Department of Treasury \| Long-term Debt \| Secured CARES Act Loan, due through 2025
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.00%
Maximum \| Revolving Credit Facility and Letter of Credit Facility \| Citibank \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity															$ 550,000,000