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Held for Sale and Divestitures (CenterPoint Energy and CERC) - Schedule of Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Total current assets held for sale | $ 1,361 | $ 0
Total current liabilities held for sale | 176 | 0
CERC |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Total current assets held for sale | 1,266 | 0
Total current liabilities held for sale | 176 | $ 0
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Louisiana And Mississippi Natural Gas LDC Businesses |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accrued unbilled revenues | 26 |
Materials and supplies | 13 |
Natural gas inventory | 5 |
Property, plant and equipment, net | 1,052 |
Goodwill | 217 |
Regulatory assets | 15 |
Other | 6 |
Total current assets held for sale | 1,361 |
Short-term borrowings | 3 |
Accounts payable | 44 |
Customer deposits | 14 |
Regulatory liabilities | 31 |
Other | 84 |
Total current liabilities held for sale | 176 |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Louisiana And Mississippi Natural Gas LDC Businesses | CERC |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accrued unbilled revenues | 26 |
Materials and supplies | 13 |
Natural gas inventory | 5 |
Property, plant and equipment, net | 1,052 |
Goodwill | 122 |
Regulatory assets | 15 |
Other | 6 |
Total current assets held for sale | 1,266 |
Short-term borrowings | 3 |
Accounts payable | 44 |
Customer deposits | 14 |
Regulatory liabilities | 31 |
Other | 84 |
Total current liabilities held for sale | 176 |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Louisiana and Mississippi Regulated Natural Gas LDC Businesses |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | 27 |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Louisiana and Mississippi Regulated Natural Gas LDC Businesses | CERC |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | $ 27 |

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