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Income Taxes - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Business Acquisition [Line Items] |  |
Deferred tax assets, valuation allowance | $ 10 | $ 10
Accrued penalties and interest | 29 |
Unrecognized tax benefits that would impact effective tax rate | 25 |
Accrued penalties and interest not included | 4 |
Decrease in unrecognized tax benefits, including penalties and interest, in the next 12 months | 3 |
State and Local Jurisdiction |  |
Business Acquisition [Line Items] |  |
Operating loss carryforwards | 1,000 |
Deferred tax assets tax credit carryforwards | 2 |
State and Local Jurisdiction | CERC Corp |  |
Business Acquisition [Line Items] |  |
Operating loss carryforwards | 657 |
Deferred tax assets tax credit carryforwards | 2 |
Domestic Tax Authority | CERC Corp |  |
Business Acquisition [Line Items] |  |
Deferred tax assets tax credit carryforwards | $ 931,000 |

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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