Income Taxes (Schedule Of Principal Components Of Net Deferred Tax Liability) (Details) - USD ($) $ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Deferred Tax Liabilities | ||
| Accelerated depreciation and other property differences | $ 1,419.4 | $ 1,384.8 |
| Partnership basis differences | 1,328.6 | 1,241.9 |
| Other regulatory assets | 210.1 | 212.1 |
| Total Deferred Tax Liabilities | 2,958.1 | 2,838.8 |
| Deferred Tax Assets | ||
| Other regulatory liabilities and deferred investment tax credits (including TCJA) | 170.4 | 182.2 |
| Pension and other postretirement/postemployment benefits | 58.8 | 58.6 |
| Net operating loss carryforward and AMT credit carryforward | 369.4 | 422.9 |
| Environmental liabilities | 12.2 | 10.1 |
| Other accrued liabilities | 43.4 | 40.3 |
| Other, net | 28.7 | 50.7 |
| Total Deferred Tax Assets | 682.9 | 764.8 |
| Deferred Tax Assets, Valuation Allowance | (6.4) | (6.4) |
| Deferred Tax Assets, Net of Valuation Allowance | 676.5 | 758.4 |
| Net Deferred Tax Liabilities | $ 2,281.6 | $ 2,080.4 |
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- Definition Accelerated depreciation and other property differences No definition available.
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- Definition Deferred Investment Tax Credits And Other Regulatory Liabilities No definition available.
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- Definition Deferred Tax Assets, Other Accrued Liabilities, Environmental No definition available.
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- Definition Other Regulatory Assets No definition available.
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- Definition Partnership basis differences No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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