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Income Taxes Schedule of Deferred tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Deferred income tax assets: |  |
Employee benefits | $ 89 | $ 99
Deferred income taxes | 28 | 21
Deferred Tax Assets, tax credits, net of valuation allowance | 69 | 73
Deferred Tax Assets, Derivative Instruments | 51 | 57
Total deferred income tax assets | 251 | 250
Deferred income tax liabilities: |  |
Depreciation and amortization | 633 | 578
Regulatory assets | 169 | 146
Deferred Tax Liabilities, Other | 13 | 14
Deferred Tax Liabilities, Gross, Noncurrent | 815 | 738
Total deferred income tax liabilities | 564 | 488
Deferred Tax Assets, Tax Credit Carryforwards | $ 14 | $ 0

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