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Accounting For Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2018 | Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items] |  |  |  |  |
Federal statutory tax rate | 21.00% | 21.00% | 21.00% | 21.00% | 35.00%
State Tax Credit Carryforward [Member] |  |  |  |  |
Components of Income Tax Expense (Benefit) [Line Items] |  |  |  |  |
Tax credit carryforward, amount | $ 19 |  |  |  |
Tax credit carryforwards, net of valuation allowance | 11 |  |  |  |
Tax credit carryforward, valuation allowance | $ (8) |  |  |  |
Minimum [Member] | State Tax Credit Carryforward [Member] |  |  |  |  |
Components of Income Tax Expense (Benefit) [Line Items] |  |  |  |  |
Tax credit carryforward, expiration date | 2025 |  |  |  |
Maximum [Member] | State Tax Credit Carryforward [Member] |  |  |  |  |
Components of Income Tax Expense (Benefit) [Line Items] |  |  |  |  |
Tax credit carryforward, expiration date | 2038 |  |  |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.1.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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- Definition The amount of the tax credit 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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