Income Taxes (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Income Taxes [Abstract] | |||
| Investment Tax Credit | $ 64 | $ 179 | $ 94 |
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate | 21.00% | 21.00% | 21.00% |
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | $ 11 | ||
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 14 | ||
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- Definition Income Taxes [Abstract] No definition available.
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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