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Divestitures (CenterPoint Energy and CERC) - Summary of Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Millions | 11 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 02, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |
Income tax expense |  | $ 0 | $ 0 | $ 201
Discontinued Operation, Alternative Cash Flow Information [Abstract] |  |  |  |
Gain on Enable Merger |  | 13 | (303) | (681)
Equity in earnings (loss) of unconsolidated affiliates, net |  | 0 | 0 | (339)
Distributions from unconsolidated affiliates |  | 0 | 0 | 155
Cash received related to Enable Merger |  | 144 | 2,075 | 22
Operating revenues |  | 8,696 | 9,321 | 8,352
Net income attributable to Enable Common Units |  | 867 | 1,008 | 1,391
CERC Corp |  |  |  |
Discontinued Operation, Alternative Cash Flow Information [Abstract] |  |  |  |
Cash received related to Enable Merger |  | 0 | 2,075 | 22
Natural gas expenses, including transportation and storage costs |  | 0 | 115 | 0
Operating revenues |  | $ 4,149 | $ 4,800 | 4,200
Discontinued Operations | Enable Midstream Partners |  |  |  |
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |
Equity in earnings of unconsolidated affiliate, net |  |  |  | 1,019
Income from discontinued operations before income taxes |  |  |  | 1,019
Income tax expense |  |  |  | 201
Net income from discontinued operations |  |  |  | 818
Discontinued Operation, Alternative Cash Flow Information [Abstract] |  |  |  |
Gain on Enable Merger | $ (680) |  |  | (681)
Equity in earnings (loss) of unconsolidated affiliates, net | (1,019) |  |  | (339)
Distributions from unconsolidated affiliates |  |  |  | 155
Transaction costs related to the Enable Merger |  |  |  | (49)
Cash received related to Enable Merger |  |  |  | 5
Cash Distribution |  |  |  | 189
Natural gas expenses, including transportation and storage costs |  |  |  | 85
Operating revenues | 3,466 |  |  |
Cost of sales, excluding depreciation and amortization | 1,959 |  |  |
Depreciation and amortization | 382 |  |  |
Operating income | 634 |  |  |
Net income attributable to Enable Common Units | 461 |  |  |
CenterPoint Energy’s interest | 248 |  |  |
Basis difference amortization | 92 |  |  |
Loss on dilution, net of proportional basis difference recognition | $ (1) |  |  |
Discontinued Operations | Enable Midstream Partners | CERC Corp |  |  |  |
Discontinued Operation, Alternative Cash Flow Information [Abstract] |  |  |  |
Natural gas expenses, including transportation and storage costs |  |  |  | $ 85
Discontinued Operations | Enable Midstream Partners | Enable Common Units |  |  |  |
Discontinued Operation, Alternative Cash Flow Information [Abstract] |  |  |  |
Distribution received (in dollars per unit) |  |  |  | $ 0.6610
Cash Distribution |  |  |  | $ 155
Discontinued Operations | Enable Midstream Partners | Enable Series A Preferred Units |  |  |  |
Discontinued Operation, Alternative Cash Flow Information [Abstract] |  |  |  |
Distribution received (in dollars per unit) |  |  |  | $ 2.2965
Cash Distribution |  |  |  | $ 34

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