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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Deferred tax assets: |  |
Benefits and compensation | $ 131 | $ 121
Regulatory liabilities | 365 | 378
Loss and credit carryforwards | 76 | 84
Asset retirement obligations | 96 | 95
Other | 124 | 49
Valuation allowance | (10) | (10)
Total deferred tax assets | 782 | 717
Deferred tax liabilities: |  |
Property, plant and equipment | 3,580 | 3,228
Regulatory assets | 401 | 601
Investment in ZENS and equity securities related to ZENS | 788 | 722
Other | 92 | 152
Total deferred tax liabilities | 4,861 | 4,703
Net deferred tax liabilities | 4,079 | 3,986
Decreases related to tax positions of prior years | 0 | (3)
Houston Electric |  |
Deferred tax assets: |  |
Benefits and compensation | 10 | 10
Regulatory liabilities | 176 | 184
Asset retirement obligations | 6 | 6
Other | 18 | 13
Total deferred tax assets | 210 | 213
Deferred tax liabilities: |  |
Property, plant and equipment | 1,497 | 1,330
Regulatory assets | 119 | 112
Total deferred tax liabilities | 1,616 | 1,442
Net deferred tax liabilities | 1,406 | 1,229
CERC Corp |  |
Deferred tax assets: |  |
Benefits and compensation | 21 | 9
Regulatory liabilities | 145 | 151
Loss and credit carryforwards | 276 | 466
Asset retirement obligations | 86 | 86
Other | 65 | 25
Total deferred tax assets | 593 | 737
Deferred tax liabilities: |  |
Property, plant and equipment | 1,602 | 1,427
Regulatory assets | 171 | 381
Other | 66 | 191
Total deferred tax liabilities | 1,839 | 1,999
Net deferred tax liabilities | $ 1,246 | $ 1,262

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