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Accounting For Income Taxes - Schedule of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Deferred income tax assets: |  |
Regulatory liabilities | $ 194 | $ 192
Tax credits and net operating loss carryforwards | 36 | 77
Provisions for pensions | 16 | 19
Other | 49 | 48
Total gross deferred income tax assets | 295 | 336
Valuation allowances for deferred tax assets | (8) | (10)
Total deferred income tax assets after valuation allowances | 287 | 326
Deferred income tax liabilities: |  |
Utility property, plant, and equipment | 759 | 747
Regulatory assets | 252 | 269
Other | 27 | 28
Total deferred income tax liabilities | 1,038 | 1,044
Net long-term deferred income tax liability | $ 751 | $ 718

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