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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Income Tax Disclosure [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | $ (3) | $ (2)
Share-based Payment Arrangement [Member] |  |
Income Tax Disclosure [Abstract] |  |
Operating Loss Carryforwards | 237 |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 237 |
Domestic Tax Jurisdiction [Member] |  |
Income Tax Disclosure [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | (2) | (1)
Operating Loss Carryforwards | 1,500 |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 1,500 |
Domestic Tax Jurisdiction [Member] | Potentially expiring in 2025 [Abstract] |  |
Income Tax Disclosure [Abstract] |  |
Operating Loss Carryforwards | 128 |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 128 |
State and Local Jurisdiction [Member] |  |
Income Tax Disclosure [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | 0 | 0
Operating Loss Carryforwards | 400 |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 400 |
State and Local Jurisdiction [Member] | Potentially expiring in 2025 [Abstract] |  |
Income Tax Disclosure [Abstract] |  |
Operating Loss Carryforwards | 52 |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 52 |
Foreign Tax Jurisdiction [Member] |  |
Income Tax Disclosure [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | (1) | $ (1)
Operating Loss Carryforwards | 3 |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | $ 3 |

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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
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