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Income Taxes - Schedule of Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Pension Plans | $ 2 | $ 62
Other Employee Benefit Plans | 106 | 96
Other | 497 | 320
Total | 605 | 478
Liabilities |  |
Accelerated Depreciation | 7,366 | 7,195
Other | 622 | 451
Total | 7,988 | 7,646
Net Deferred Income Tax Liabilities | $ 7,383 | $ 7,168

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