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Investments - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Change in fair value | $ 2,000,000 | $ (4,000,000) | $ 0
Equity method investments | 43,000,000 | 38,000,000 |
Debt securities, realized gain (loss) | 1,000,000 | 0 | 0
Unrealized gain (loss) | 0 | 5,000,000 | 2,000,000
Debt securities, net unrealized gain (loss) | 2,000,000 | (12,000,000) | (10,000,000)
Realized gain on equity investment securities | 4,000,000 | 1,000,000 | 0
Cost method investments - jetblue tech ventures | 96,000,000 | 83,000,000 |
Recognized gain (loss) on investment | 2,000,000 | (2,000,000) | 37,000,000
Cost method investments TWA flight center hotel | $ 14,000,000 | 14,000,000 |
TWA Flight Center Hotel |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Ownership percentage, noncontrolling interest | 10.00% |  |
Recurring |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Equity investment securities |  | 8,000,000 |
Level 1 | Recurring |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Equity investment securities | $ 0 | 8,000,000 |
Available-for-sale securities |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Change in fair value | $ 1,000,000 | $ (1,000,000) | $ 0

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