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Supplemental Disclosure of Cash Flow and Balance Sheet Information - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Houston Electric | Other Current Liabilities |  |
Condensed Financial Statements, Captions [Line Items] |  |
Contributions in aid of construction | $ 85 | $ 47
Credits Related to Customers on Budget Billing Programs | CERC |  |
Condensed Financial Statements, Captions [Line Items] |  |
Contract with customer, liability, current, budget billing programs | $ 98 | $ 118

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- Definition Contract with Customer, Liability, Current, Budget Billing Programs + References No definition available. + Details
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-11 + Details
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- Definition Developers, builders, governmental agencies and municipalities will provide the entity with cash, or in some cases property, to extend its services to their properties. Nonrefundable contributions are recorded as contributions in aid of construction ("CIAC"). + References No definition available. + Details
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