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v3.20.4

Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Jul. 02, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |
Long term debt | $ 27,301 |  | $ 14,733
Less: unamortized debt discount, premiums and debt issuance costs | (554) |  | (181)
Less: current portion of long-term debt | (1,911) |  | (1,407)
Long-term debt, net | 24,836 |  | 13,145
Secured | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 1,000 |  | 0
Fixed interest rate | 1.49% |  |
Secured | Revolving Credit Facility | LIBOR | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 0.49% |  |
Secured | Revolving Credit Facility | LIBOR | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 5.25% |  |
Secured | Aircraft notes |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 14,538 |  | 11,585
Secured | Aircraft notes | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Fixed interest rate | 0.73% |  |
Secured | Aircraft notes | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Fixed interest rate | 9.80% |  |
Secured | Aircraft notes | LIBOR | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 0.49% |  |
Secured | Aircraft notes | LIBOR | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 5.25% |  |
Secured | MileagePlus Senior Secured Notes |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 3,800 |  | 0
Fixed interest rate | 6.50% | 6.50% |
Secured | MileagePlus Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 3,000 |  | 0
Fixed interest rate | 5.49% |  |
Secured | MileagePlus Term Loan Facility | LIBOR | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 0.49% |  |
Secured | MileagePlus Term Loan Facility | LIBOR | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 5.25% |  |
Secured | CARES Act Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 520 |  | 0
Fixed interest rate | 3.24% |  |
Secured | CARES Act Term Loan Facility | LIBOR | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 0.49% |  |
Secured | CARES Act Term Loan Facility | LIBOR | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 5.25% |  |
Secured | Term loan |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 1,444 |  | 1,459
Fixed interest rate | 2.49% |  |
Secured | Term loan | LIBOR | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 0.49% |  |
Secured | Term loan | LIBOR | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 5.25% |  |
Unsecured | Notes |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 1,050 |  | 1,350
Unsecured | Notes | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Fixed interest rate | 4.25% |  |
Unsecured | Notes | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Fixed interest rate | 5.00% |  |
Unsecured | PSP Note |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 1,501 |  | 0
Fixed interest rate | 1.00% |  |
Unsecured | Other unsecured debt |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 448 |  | $ 339
Unsecured | Other unsecured debt | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Fixed interest rate | 4.00% |  |
Unsecured | Other unsecured debt | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Fixed interest rate | 5.75% |  |

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