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Income Taxes (Summary Of Detail Of Tax Carryforwards) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Tax Credit Carryforwards | $ 27 | $ 0
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 28 | 31
Operating Loss Carryforwards, Valuation Allowance | 20 | 19
Deferred Tax Assets, Net of Valuation Allowance | 1,631 | $ 1,637
Deferred Tax Assets, Operating Loss Carryforwards | 55 |
Tax Credit Carryforward, Name [Domain] |  |
Income Tax Contingency [Line Items] |  |
Operating Loss Carryforwards, Valuation Allowance | 0 |
Deferred Tax Assets, Net of Valuation Allowance | 27 |
Total Net Operating Losses [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Net of Valuation Allowance | 35 |
Net Operating Losses Federal Date Range 1 Member | Tax Credit Carryforward, Name [Domain] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Tax Credit Carryforwards | 27 |
Net Operating Losses Federal Date Range 2 |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 8 |
Operating Loss Carryforwards, Valuation Allowance | 0 |
Deferred Tax Assets, Net of Valuation Allowance | 8 |
Net Operating Losses States Date Range One [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 11 |
Operating Loss Carryforwards, Valuation Allowance | 11 |
Deferred Tax Assets, Net of Valuation Allowance | 0 |
Net Operating Losses States Date Range Two [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 3 |
Operating Loss Carryforwards, Valuation Allowance | 3 |
Deferred Tax Assets, Net of Valuation Allowance | 0 |
Net Operating Losses States Date Range Three [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 3 |
Operating Loss Carryforwards, Valuation Allowance | 3 |
Deferred Tax Assets, Net of Valuation Allowance | 0 |
Other Credits States Date Range One [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 3 |
Operating Loss Carryforwards, Valuation Allowance | 3 |
Deferred Tax Assets, Net of Valuation Allowance | $ 0 |

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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