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INCOME TAXES - Deferred Taxes (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ 799 | $ 1,217 |
Capital loss carryforward | 0 | 8 |
Pension, postretirement and other benefits | 1,205 | 1,488 |
Investments | 936 | 806 |
Deferred revenue | 2,158 | 2,110 |
Lease liabilities | 2,816 | 2,193 |
Other | 608 | 709 |
Valuation allowance | (951) | (877) | $ (1,176)
Total deferred tax assets | 7,571 | 7,654 |
Deferred tax liabilities: |  |  |
Depreciation | 7,040 | 5,570 |
Operating lease assets | 1,369 | 1,533 |
Intangible assets | 1,165 | 1,143 |
Other | 78 | 73 |
Total deferred tax liabilities | 9,652 | 8,319 |
Other noncurrent assets | 95 | 243 |
Deferred income taxes, net | 2,176 | 908 |
Net deferred tax liabilities | $ 2,081 | $ 665 |

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