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v3.25.0.1

Long-term Debt, Short-term Borrowings and Finance Lease Obligations - Senior Notes and General Debt (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2024 USD ($) $ / shares | Mar. 31, 2021 USD ($) day $ / shares | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Aug. 16, 2024 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Debt extinguishment expense |  |  |  | $ 0 | $ 0 |
Gain on debt extinguishments |  |  | $ 22,000,000 | 0 | 0 |
Repayment of long-term debt |  |  | 748,000,000 | 347,000,000 | 369,000,000 |
Pledged assets not separately reported flight equipment |  |  | 7,300,000,000 |  |  |
Interest paid, including capitalized interest, operating and investing activities |  |  | $ 230,000,000 | 80,000,000 | 124,000,000 |
Convertible Senior Notes Due 2026 | Convertible Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 0.50% | 0.50% |  |  |
Principal amount |  | $ 750,000,000 |  |  |  |
Proceeds from offering |  | $ 734,000,000 |  |  |  |
Debt instrument, conversion ratio |  | 0.0385802 |  |  |  |
Debt instrument, convertible ratio (in dollars per share) | $ / shares |  | $ 25.92 |  |  |  |
Debt extinguishment expense |  |  | $ 425,000,000 |  |  |
Gain on debt extinguishments |  |  | $ 22,000,000 |  |  |
Effective percentage |  |  | 0.50% |  |  |
Interest expense |  |  | $ 6,000,000 | 7,000,000 | 7,000,000 |
Debt issuance costs amortization |  |  | 3,000,000 | 3,000,000 | 3,000,000 |
Carrying Value |  |  | 323,000,000 | 742,000,000 |  |
Contractual interest expense |  |  | $ 3,000,000 | 4,000,000 | $ 4,000,000 |
Convertible Senior Notes Due 2026 | Convertible Debt | Debt Instrument, Redemption, Period One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, redemption price, percentage |  | 100.00% |  |  |  |
Trading days | day |  | 20 |  |  |  |
Convertible Senior Notes Due 2026 | Convertible Debt | Debt Instrument, Redemption, Period Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, redemption price, percentage |  | 130.00% |  |  |  |
Trading days | day |  | 30 |  |  |  |
2.50% convertible senior notes, due through 2029 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 2.50% |  |  |
Carrying Value |  |  | $ 460,000,000 | $ 0 |  |
2.50% convertible senior notes, due through 2029 | Convertible Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, interest rate, stated percentage | 2.50% |  | 2.50% |  |  |
Principal amount | $ 460,000,000 |  |  |  |  | $ 400,000,000
Debt instrument, conversion ratio | 0.1633987 |  |  |  |  |
Debt instrument, convertible ratio (in dollars per share) | $ / shares | $ 6.12 |  |  |  |  |
Debt instrument, redemption price, percentage | 100.00% |  |  |  |  |
Effective percentage |  |  | 2.60% |  |  |
Interest expense |  |  | $ 5,000,000 |  |  |
Debt issuance costs amortization |  |  | 1,000,000 |  |  |
Carrying Value |  |  | 450,000,000 |  |  |
Contractual interest expense |  |  | $ 4,000,000 |  |  |
2.50% convertible notes, due through 2029, additional option | Convertible Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 60,000,000

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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. + Details
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