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v3.23.1

Divestitures (CenterPoint Energy and CERC) - Divestitures Narrative (Details) mi in Thousands, $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 29, 2021 USD ($) mi | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) | May 31, 2022 USD ($)
Discontinued Operation, Additional Disclosures [Abstract] |  |  |  |  |
Proceeds from divestitures |  | $ 0 | $ 2,060 |  |
Miles of pipeline (in miles) | mi | 17 |  |  |  |
Gain on sale |  | 0 | 303 |  |
Transition services agreement charges |  | 1 | 9 |  |
Transition services agreement, accounts receivable |  | 1 |  | $ 1 |
CERC |  |  |  |  |
Discontinued Operation, Additional Disclosures [Abstract] |  |  |  |  |
Proceeds from divestitures |  | 0 | 2,060 |  |
Gain on sale |  | $ 0 | $ 557 |  |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Arkansas and Oklahoma Natural Gas Businesses |  |  |  |  |
Discontinued Operation, Additional Disclosures [Abstract] |  |  |  |  |
Proceeds from divestitures | $ 2,150 |  |  |  |
Recovery of costs | $ 425 |  |  |  |
Gain on sale |  |  |  | 303 |
Transaction costs |  |  |  | 59 |
Receivables, net |  |  |  |  | $ 15
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Arkansas and Oklahoma Natural Gas Businesses | CERC |  |  |  |  |
Discontinued Operation, Additional Disclosures [Abstract] |  |  |  |  |
Gain on sale |  |  |  | 557 |
Transaction costs |  |  |  | $ 59 |
Receivables, net |  |  |  |  | $ 15

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