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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2024
Income Tax Disclosure [Abstract] |
Schedule of Deferred Tax Assets and Liabilities | Deferred tax (assets) and liabilities comprise the following:
(in millions) | 2024 |  | 2023
Excess of tax over book depreciation | $ | 2,017 |  |  | $ | 1,605 |
Intangibles - net | 208 |  |  | 16 |
Operating lease assets | 320 |  |  | 292 |
Other - net | 79 |  |  | 3 |
Deferred tax liabilities | 2,624 |  |  | 1,916 |
Loyalty program | (577) |  |  | (455) |
Inventory obsolescence | (29) |  |  | (23) |
Employee benefits | (240) |  |  | (159) |
Net operating losses | (320) |  |  | (166) |
Operating lease liabilities | (345) |  |  | (329) |
Leasehold maintenance | (31) |  |  | (28) |
Other - net | (188) |  |  | (77) |
Deferred tax assets | (1,730) |  |  | (1,237) |
Valuation allowance | 40 |  |  | 16 |
Net deferred tax liabilities | $ | 934 |  |  | $ | 695 |
Schedule of Components of Income Tax Expense (Benefit) | The components of income tax expense (benefit) are as follows:
(in millions) | 2024 |  | 2023 |  | 2022
Current income tax (benefit) expense: |  |  |  |  |
Federal | $ | 8 |  |  | $ | (3) |  |  | $ | (11) |
State | 13 |  |  | (4) |  |  | (3) |
Total current income tax (benefit) expense | 21 |  |  | (7) |  |  | (14) |
Deferred income tax expense: |  |  |  |  |
Federal | 120 |  |  | 82 |  |  | 32 |
State | 9 |  |  | 13 |  |  | 3 |
Total deferred income tax expense | 129 |  |  | 95 |  |  | 35 |
Income tax expense | $ | 150 |  |  | $ | 88 |  |  | $ | 21 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | Income tax expense reconciles to the amount computed by applying the 2024 U.S. federal rate of 21% to income before income tax and for deferred taxes as follows:
(in millions) | 2024 |  | 2023 |  | 2022
Income before income tax | $ | 545 |  |  | $ | 323 |  |  | $ | 79 |
Expected tax expense | 114 |  |  | 68 |  |  | 17 |
Nondeductible expenses | 24 |  |  | 14 |  |  | 11 |
State income tax expense | 24 |  |  | 17 |  |  | 5 |
State income sourcing | (5) |  |  | (5) |  |  | (2) |
Valuation allowance | 1 |  |  | (1) |  |  | (4) |
Tax credits | (7) |  |  | (3) |  |  | (5) |
Uncertain tax positions | 5 |  |  | (5) |  |  | (1) |
Other - net | (6) |  |  | 3 |  |  | — |
Actual tax expense | $ | 150 |  |  | $ | 88 |  |  | $ | 21 |
Effective tax rate(a) | 27.5 | % |  | 27.1 | % |  | 26.2 | %
(a) Figures in the table above are rounded to the nearest million. As a result, a manual recalculation of the effective tax rate using these rounded figures may not agree directly to the Company's actual effective tax rate shown in the table.
Summary of Income Tax Contingencies [Table Text Block] | The Company has identified its federal tax return and its state tax returns in Alaska, California, Hawai'i, and Oregon as “major” tax jurisdictions. A summary of the Company's jurisdictions and the periods that are subject to examination are as follows:
Jurisdiction | Period
Federal | 2021 to 2023
Alaska | 2019 to 2023
California | 2010 to 2023
Hawai'i | 2020 to 2023
Oregon | 2015 to 2023
Schedule of Unrecognized Tax Benefits Roll Forward | Changes in the liability for gross unrecognized tax benefits during 2024, 2023 and 2022 are as follows:
(in millions) | 2024 |  | 2023 |  | 2022
Balance at January 1 | $ | 25 |  |  | $ | 21 |  |  | $ | 41 |
Additions related to prior years | 1 |  |  | — |  |  | — |
Releases related to prior years | — |  |  | — |  |  | (1) |
Additions related to current year activity | 5 |  |  | 9 |  |  | 1 |
Releases due to settlements | — |  |  | (3) |  |  | (20) |
Additions from acquisition | 5 |  |  | — |  |  | — |
Releases due to lapse of statute of limitations | — |  |  | (2) |  |  | — |
Balance at December 31 | $ | 36 |  |  | $ | 25 |  |  | $ | 21 |

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