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Commitments and Contingencies - Schedule of Estimated Accrued Costs (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($)
CenterPoint Energy |
Loss Contingencies [Line Items] |
Amount accrued for remediation | $ 13
CenterPoint Energy | Minimum |
Loss Contingencies [Line Items] |
Estimated remediation costs | $ 8
Years to resolve contingency | 5 years
CenterPoint Energy | Maximum |
Loss Contingencies [Line Items] |
Estimated remediation costs | $ 47
Years to resolve contingency | 50 years
CERC | CERC |
Loss Contingencies [Line Items] |
Amount accrued for remediation | $ 11
CERC | CERC | Minimum |
Loss Contingencies [Line Items] |
Estimated remediation costs | $ 7
Years to resolve contingency | 5 years
CERC | CERC | Maximum |
Loss Contingencies [Line Items] |
Estimated remediation costs | $ 40
Years to resolve contingency | 50 years

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