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INCOME TAXES - Deferred Taxes (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ 1,217 | $ 1,395 |
Capital loss carryforward | 8 | 50 |
Pension, postretirement and other benefits | 1,488 | 1,467 |
Investments | 806 | 1,106 |
Deferred revenue | 2,110 | 2,334 |
Lease liabilities | 2,193 | 2,376 |
Other | 709 | 682 |
Valuation allowance | (877) | (1,176) | $ (833)
Total deferred tax assets | 7,654 | 8,234 |
Deferred tax liabilities: |  |  |
Depreciation | 5,570 | 5,110 |
Operating lease assets | 1,533 | 1,624 |
Intangible assets | 1,143 | 1,121 |
Other | 73 | 78 |
Total deferred tax liabilities | 8,319 | 7,933 |
Deferred income taxes, net | 243 | 325 |
Deferred income taxes, net | (908) | (24) |
Net deferred tax (liabilities) assets | $ (665) |  |
Net deferred tax (liabilities) assets |  | $ 301 |

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