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Income Taxes - Schedule of Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Assets |  |
Other Employee Benefit Plans | $ 103 | $ 105
Other | 459 | 553
Total | 562 | 658
Liabilities |  |
Accelerated Depreciation | 7,678 | 7,600
Other | 630 | 627
Total | 8,308 | 8,227
Net Deferred Income Tax Liabilities | $ 7,746 | $ 7,569

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