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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Accumulated other comprehensive income (loss), net of taxes | A rollforward of the amounts included in accumulated other comprehensive income (loss), net of taxes for the years ended December 31, 2023, 2022, and 2021 is as follows (in millions):
| Aircraft Fuel Derivatives (1) | Available-for-sale securities | Total
Balance of accumulated income, at December 31, 2020 | $ | — |  | $ | — |  | $ | — |
Reclassifications into earnings, net of taxes of $0 | — |  | — |  | — |
Change in fair value, net of taxes of $0 | — |  | — |  | — |
Balance of accumulated income, at December 31, 2021 | $ | — |  | $ | — |  | $ | — |
Reclassifications into earnings, net of taxes of $(3) | 4 |  | — |  | 4 |
Change in fair value, net of taxes of $2 | (3) |  | (1) |  | (4) |
Balance of accumulated income (loss), at December 31, 2022 | $ | 1 |  | $ | (1) |  | $ | — |
Reclassifications into earnings, net of taxes of $2 | (5) |  | (1) |  | (6) |
Change in fair value, net of taxes of $0 | 1 |  | 1 |  | 2 |
Balance of accumulated loss, at December 31, 2023 | $ | (3) |  | $ | (1) |  | $ | (4) |
(1) Reclassified to aircraft fuel expense.

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