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v3.25.0.1

Goodwill (CenterPoint Energy and CERC) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2020
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | $ 4,160 | $ 4,294 |
Disposal |  | 134 |
Held for Sale | 217 |  |
Goodwill, ending balance | 3,943 | 4,160 |
CERC |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 1,583 |  |
Goodwill, ending balance | 1,461 | 1,583 |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | CERC |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 1,583 |  |
Held for Sale | 122 |  |
Goodwill, ending balance | 1,461 | 1,583 |
Electric |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 936 | 936 |
Disposal |  | 0 |
Held for Sale | 0 |  |
Goodwill, ending balance | 936 | 936 |
Goodwill, Impaired, Accumulated Impairment Loss [Abstract] |  |  |
Accumulated goodwill impairment charge |  |  | $ 185
Natural Gas |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 2,920 | 2,920 |
Disposal |  | 0 |
Held for Sale | 217 |  |
Goodwill, ending balance | 2,703 | 2,920 |
Corporate and Other |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 304 | 438 |
Disposal |  | 134 |
Held for Sale | 0 |  |
Goodwill, ending balance | $ 304 | $ 304 |

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