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Accumulated Other Comprehensive Income (Loss) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) Comprehensive income (loss) includes changes in fair value of our aircraft fuel derivatives which qualify for hedge accounting and unrealized gain (loss) on available-for-sale securities. 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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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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