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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Accumulated other comprehensive income (loss), net of taxes | Comprehensive income (loss) includes changes in fair value of our aircraft fuel derivatives which qualify for hedge accounting. A rollforward of the amounts included in accumulated other comprehensive income (loss), net of taxes for the years ended December 31, 2020, 2019, and 2018 is as follows (in millions):
|  | Aircraft Fuel Derivatives(1)(2) |  | Total
Balance of accumulated income, at December 31, 2017 |  | $ | — |  |  | $ | — |
Reclassifications into earnings, net of deferred taxes of $0 |  | 1 |  |  | 1 |
Change in fair value, net of deferred taxes of $2 |  | (4) |  |  | (4) |
Balance of accumulated (loss), at December 31, 2018 |  | (3) |  |  | (3) |
Reclassifications into earnings, net of deferred taxes of $(1) |  | 4 |  |  | 4 |
Change in fair value, net of deferred taxes of $0 |  | 1 |  |  | 1 |
Balance of accumulated income, at December 31, 2019 |  | 2 |  |  | 2 |
Reclassifications into earnings, net of deferred taxes of $(5) |  | 9 |  |  | 9 |
Change in fair value, net of deferred taxes of $5 |  | (11) |  |  | (11) |
Balance of accumulated income, at December 31, 2020 |  | $ | — |  |  | $ | — |
(1)Reclassified to aircraft fuel expense. (2)In 2020, the Company made several capacity reductions in response to the COVID-19 pandemic. These capacity reductions led to the discontinuance of hedge accounting on a number of our aircraft fuel derivatives as the forecasted consumption of aircraft fuel was no longer probable. L osses of $5 million that were previously deferred in other comprehensive loss were reclassified to interest income and other during the year ended December 31, 2020.

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