Class Of Warrant Or Right, Term

No definition available.

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- Definition

Debt Instrument, Aggregate Purchase Offer For Extinguishment Of Debt

+ References

No definition available.

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- Definition

Grant Payments Received Through Payroll Support Program

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- Definition

Letters Of Credit Outstanding That Do Not Reduce Availability Under Revolving Facilities, Amount

+ References

No definition available.

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- Definition

Letters Of Credit Outstanding That Reduce Availability Under Revolving Facilities, Amount

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No definition available.

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- Definition

Proceeds from Government Payroll Support Program

+ References

No definition available.

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- Definition

Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants.

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- Definition

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

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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- Definition

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

+ References

No definition available.

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- Definition

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

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- Definition

The average effective interest rate during the reporting period.

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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.

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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

Gross amount of debt extinguished.

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No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

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

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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No definition available.

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- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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- Definition

The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Debt - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended	3 Months Ended					6 Months Ended	9 Months Ended		60 Months Ended
	Jul. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2031	Dec. 31, 2030	Mar. 31, 2026	Dec. 31, 2025	Dec. 31, 2020
Debt Instrument [Line Items]
Government grant warrant issuance			$ 42,000,000	$ 44,000,000	$ 14,000,000	$ 100,000,000
Aggregate cash tender offer for settlement of debt	$ 1,000,000,000
Loss on extinguishment of debt		$ 183,000,000	26,000,000		$ 0			$ 266,000,000	$ 0
Outstanding letters of credit that reduce availability under revolvers		300,000,000						300,000,000
Outstanding letters of credit that do not affect availability of revolvers		300,000,000						300,000,000
Revolving credit facility
Debt Instrument [Line Items]
Undrawn credit facilities		2,600,000,000						$ 2,600,000,000
2020 Term Loan \| Secured debt
Debt Instrument [Line Items]
Debt instrument amount														$ 1,500,000,000
Loss on extinguishment of debt				$ 56,000,000
EETC \| Secured debt
Debt Instrument [Line Items]
Repayment of debt			$ 450,000,000
2025 and 2026 Notes \| Secured and unsecured debt
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 166,000,000
2025 Notes \| Secured debt
Debt Instrument [Line Items]
Interest rate per annum (percent)	7.00%
Principal amount of repurchased debt	$ 677,000,000
Payment for repurchase of debt	$ 800,000,000
2026 Notes \| Unsecured debt
Debt Instrument [Line Items]
Interest rate per annum (percent)	7.375%
Principal amount of repurchased debt	$ 169,000,000
Payment for repurchase of debt	$ 200,000,000
2025 SkyMiles Notes \| Secured debt
Debt Instrument [Line Items]
Interest rate per annum (percent)	4.50%
Certificates, Unsecured notes, and SkyMiles Term Loan \| Secured and unsecured debt
Debt Instrument [Line Items]
Payment for repurchase of debt		262,000,000
Loss on extinguishment of debt		$ 17,000,000
PSP2
Debt Instrument [Line Items]
Proceeds from payroll support program							$ 3,290,000,000
Grant payments received through payroll support program							$ 2,333,000,000
PSP2 \| PSP2 Warrants
Debt Instrument [Line Items]
Number shares called by warrants (in shares)		2.4	2.4				2.4	2.4
Warrant exercise price (USD per share)			$ 39.73				$ 39.73
Warrants term (in years)							5 years
Government grant warrant issuance							$ 52,000,000
PSP2 \| Payroll Support Program Extension \| Unsecured debt
Debt Instrument [Line Items]
Proceeds from unsecured loan							$ 957,000,000
Debt instrument term							10 years
Relative fair value basis			$ 905,000,000				$ 905,000,000
PSP2 \| Payroll Support Program Extension \| Unsecured debt \| Forecast
Debt Instrument [Line Items]
Annual interest rate (percent)													1.00%
PSP2 \| Payroll Support Program Extension \| Unsecured debt \| SOFR \| Forecast
Debt Instrument [Line Items]
Margin on rate (percent)											2.00%
PSP3
Debt Instrument [Line Items]
Proceeds from payroll support program			3,069,000,000
Grant payments received through payroll support program			$ 2,178,000,000
PSP3 \| PSP3 Warrants
Debt Instrument [Line Items]
Number shares called by warrants (in shares)		1.9	1.9				1.9	1.9
Warrant exercise price (USD per share)			$ 47.80				$ 47.80
Warrants term (in years)			5 years
Government grant warrant issuance			$ 34,000,000
PSP3 \| Payroll Support Program 3 \| Unsecured debt
Debt Instrument [Line Items]
Proceeds from unsecured loan			$ 891,000,000
Debt instrument term			10 years
Relative fair value basis			$ 857,000,000				$ 857,000,000
PSP3 \| Payroll Support Program 3 \| Unsecured debt \| Forecast
Debt Instrument [Line Items]
Annual interest rate (percent)												1.00%
PSP3 \| Payroll Support Program 3 \| Unsecured debt \| SOFR \| Forecast
Debt Instrument [Line Items]
Margin on rate (percent)										2.00%