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Regulatory Matters - Schedule of Regulatory Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 2,674 | $ 3,578
Regulatory assets | 161 | 1,385
Total Non-Current Regulatory Assets | 2,513 | 2,193
Total Regulatory Liabilities | 3,247 | 3,270
Total current regulatory liabilities | 39 | 25
Total Non-Current Regulatory Liabilities | 3,208 | 3,245
Regulatory liabilities related to TCJA |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 1,377 | 1,436
Estimated removal costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 1,322 | 1,338
Other Regulatory Assets (Liabilities) |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 548 | 496
Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Regulatory assets | 86 | 1,175
Future Amounts Recoverable From Ratepayers |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 765 | 712
Future Amounts Recoverable From Ratepayers | Benefit obligations |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 379 | 392
Future Amounts Recoverable From Ratepayers | Asset retirement obligations & other |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 290 | 237
Future Amounts Recoverable From Ratepayers | Net deferred income taxes |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 96 | 83
Amounts Deferred For Future Recovery |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 450 | 1,716
Amounts Deferred For Future Recovery | Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets |  | 1,073
Amounts Deferred For Future Recovery | Cost recovery riders |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 113 | 133
Amounts Deferred For Future Recovery | Hurricane and February 2021 Winter Storm Event restoration costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 149 | 129
Amounts Deferred For Future Recovery | Other Regulatory Assets (Liabilities) |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 147 | 129
Amounts Deferred For Future Recovery | Gas recovery costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 27 | 108
Amounts Deferred For Future Recovery | Decoupling |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 17 | 3
Amounts Deferred For Future Recovery | COVID-19 incremental costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 12 | 13
Amounts Deferred For Future Recovery | TEEEF costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 48 | 182
Amounts Deferred For Future Recovery | Unrecognized equity return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Unrecognized equity return | (63) | (54)
Amounts Currently Recovered In Customer Rates |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 1,459 | 1,150
Amounts Currently Recovered In Customer Rates | Benefit obligations |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 11 | 18
Amounts Currently Recovered In Customer Rates | Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 208 | 294
Amounts Currently Recovered In Customer Rates | Hurricane and February 2021 Winter Storm Event restoration costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 17 | 30
Amounts Currently Recovered In Customer Rates | Gas recovery costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 34 | 79
Amounts Currently Recovered In Customer Rates | TEEEF costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 208 |
Amounts Currently Recovered In Customer Rates | Unrecognized equity return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Unrecognized equity return | (141) | (134)
Amounts Currently Recovered In Customer Rates | Regulatory assets related to TCJA |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 47 | 47
Amounts Currently Recovered In Customer Rates | Authorized trackers and cost deferrals |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 535 | 499
Amounts Currently Recovered In Customer Rates | Securitized regulatory assets |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 434 | 229
Amounts Currently Recovered In Customer Rates | Unamortized loss on reacquired debt and hedging |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 106 | 88
Amounts Currently Recovered In Customer Rates, Earning Return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 459 |
Amounts Currently Recovered In Customer Rates, Not Earning A Return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 428 |
Remaining weighted average period for which no return on investment during recovery period is provided | 12 years |
Houston Electric |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 752 | 778
Regulatory assets | 0 | 0
Total Non-Current Regulatory Assets | 752 | 778
Total Regulatory Liabilities | 1,031 | 1,155
Total current regulatory liabilities | 6 | 0
Total Non-Current Regulatory Liabilities | 1,025 | 1,155
Houston Electric | Regulatory liabilities related to TCJA |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 695 | 716
Houston Electric | Estimated removal costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 91 | 158
Houston Electric | Other Regulatory Assets (Liabilities) |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 245 | 281
Houston Electric | Future Amounts Recoverable From Ratepayers |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 116 | 98
Houston Electric | Future Amounts Recoverable From Ratepayers | Benefit obligations |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
Houston Electric | Future Amounts Recoverable From Ratepayers | Asset retirement obligations & other |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 75 | 64
Houston Electric | Future Amounts Recoverable From Ratepayers | Net deferred income taxes |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 41 | 34
Houston Electric | Amounts Deferred For Future Recovery |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 199 | 322
Houston Electric | Amounts Deferred For Future Recovery | Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets |  | 0
Houston Electric | Amounts Deferred For Future Recovery | Cost recovery riders |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
Houston Electric | Amounts Deferred For Future Recovery | Hurricane and February 2021 Winter Storm Event restoration costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 123 | 113
Houston Electric | Amounts Deferred For Future Recovery | Other Regulatory Assets (Liabilities) |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 59 | 46
Houston Electric | Amounts Deferred For Future Recovery | Gas recovery costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
Houston Electric | Amounts Deferred For Future Recovery | Decoupling |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
Houston Electric | Amounts Deferred For Future Recovery | COVID-19 incremental costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 8 | 8
Houston Electric | Amounts Deferred For Future Recovery | TEEEF costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 48 | 182
Houston Electric | Amounts Deferred For Future Recovery | Unrecognized equity return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Unrecognized equity return | (39) | (27)
Houston Electric | Amounts Currently Recovered In Customer Rates |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 437 | 358
Houston Electric | Amounts Currently Recovered In Customer Rates | Benefit obligations |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 11 | 18
Houston Electric | Amounts Currently Recovered In Customer Rates | Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
Houston Electric | Amounts Currently Recovered In Customer Rates | Hurricane and February 2021 Winter Storm Event restoration costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 17 | 30
Houston Electric | Amounts Currently Recovered In Customer Rates | Gas recovery costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
Houston Electric | Amounts Currently Recovered In Customer Rates | TEEEF costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 208 |
Houston Electric | Amounts Currently Recovered In Customer Rates | Unrecognized equity return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Unrecognized equity return | (36) | (55)
Houston Electric | Amounts Currently Recovered In Customer Rates | Regulatory assets related to TCJA |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 47 | 47
Houston Electric | Amounts Currently Recovered In Customer Rates | Authorized trackers and cost deferrals |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 44 | 25
Houston Electric | Amounts Currently Recovered In Customer Rates | Securitized regulatory assets |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 74 | 229
Houston Electric | Amounts Currently Recovered In Customer Rates | Unamortized loss on reacquired debt and hedging |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 72 | 64
Houston Electric | Amounts Currently Recovered In Customer Rates, Earning Return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 365 |
Houston Electric | Amounts Currently Recovered In Customer Rates, Not Earning A Return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 72 |
Remaining weighted average period for which no return on investment during recovery period is provided | 28 years |
CERC Corp |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 1,011 | 2,180
Regulatory assets | 161 | 1,336
Total Non-Current Regulatory Assets | 850 | 844
Total Regulatory Liabilities | 1,915 | 1,826
Total current regulatory liabilities | 33 | 25
Total Non-Current Regulatory Liabilities | 1,882 | 1,801
CERC Corp | Regulatory liabilities related to TCJA |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 505 | 536
CERC Corp | Estimated removal costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 1,150 | 1,097
CERC Corp | Other Regulatory Assets (Liabilities) |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 260 | 193
CERC Corp | Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Regulatory assets | 86 | 1,175
CERC Corp | Future Amounts Recoverable From Ratepayers |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 233 | 200
CERC Corp | Future Amounts Recoverable From Ratepayers | Benefit obligations |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 5 | 5
CERC Corp | Future Amounts Recoverable From Ratepayers | Asset retirement obligations & other |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 186 | 155
CERC Corp | Future Amounts Recoverable From Ratepayers | Net deferred income taxes |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 42 | 40
CERC Corp | Amounts Deferred For Future Recovery |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 203 | 1,324
CERC Corp | Amounts Deferred For Future Recovery | Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets |  | 1,073
CERC Corp | Amounts Deferred For Future Recovery | Cost recovery riders |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 73 | 57
CERC Corp | Amounts Deferred For Future Recovery | Hurricane and February 2021 Winter Storm Event restoration costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 26 | 16
CERC Corp | Amounts Deferred For Future Recovery | Other Regulatory Assets (Liabilities) |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 72 | 67
CERC Corp | Amounts Deferred For Future Recovery | Gas recovery costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 27 | 108
CERC Corp | Amounts Deferred For Future Recovery | Decoupling |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 17 | 3
CERC Corp | Amounts Deferred For Future Recovery | COVID-19 incremental costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 4 | 5
CERC Corp | Amounts Deferred For Future Recovery | TEEEF costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
CERC Corp | Amounts Deferred For Future Recovery | Unrecognized equity return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Unrecognized equity return | (16) | (5)
CERC Corp | Amounts Currently Recovered In Customer Rates |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 575 | 656
CERC Corp | Amounts Currently Recovered In Customer Rates | Benefit obligations |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
CERC Corp | Amounts Currently Recovered In Customer Rates | Extraordinary gas costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 208 | 294
CERC Corp | Amounts Currently Recovered In Customer Rates | Hurricane and February 2021 Winter Storm Event restoration costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
CERC Corp | Amounts Currently Recovered In Customer Rates | Gas recovery costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 34 | 30
CERC Corp | Amounts Currently Recovered In Customer Rates | TEEEF costs |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 |
CERC Corp | Amounts Currently Recovered In Customer Rates | Unrecognized equity return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Unrecognized equity return | (53) | (49)
CERC Corp | Amounts Currently Recovered In Customer Rates | Regulatory assets related to TCJA |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
CERC Corp | Amounts Currently Recovered In Customer Rates | Authorized trackers and cost deferrals |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 375 | 369
CERC Corp | Amounts Currently Recovered In Customer Rates | Securitized regulatory assets |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 0
CERC Corp | Amounts Currently Recovered In Customer Rates | Unamortized loss on reacquired debt and hedging |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 11 | $ 12
CERC Corp | Amounts Currently Recovered In Customer Rates, Earning Return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 94 |
CERC Corp | Amounts Currently Recovered In Customer Rates, Not Earning A Return |  |
Schedule of Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 320 |
Remaining weighted average period for which no return on investment during recovery period is provided | 8 years |

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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
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