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Supplemental Disclosure of Cash Flow and Balance Sheet Information (Tables) | 12 Months Ended
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Dec. 31, 2023
Supplemental Cash Flow Elements [Abstract] |
Schedule of Cash Flow, Supplemental Disclosures | The tables below provide supplemental disclosure of cash flow information:
| 2023 |  | 2022 |  | 2021
| CenterPoint Energy |  | Houston Electric |  | CERC |  | CenterPoint Energy |  | Houston Electric |  | CERC |  | CenterPoint Energy |  | Houston Electric |  | CERC
| (in millions)
Cash Payments/Receipts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest, net of capitalized interest (under further review) | $ | 664 |  |  | $ | 287 |  |  | $ | 175 |  |  | $ | 480 |  |  | $ | 223 |  |  | $ | 104 |  |  | $ | 489 |  |  | $ | 208 |  |  | $ | 130 |
Income tax payments (refunds), net (1) | 215 |  |  | 12 |  |  | 115 |  |  | 421 |  |  | 142 |  |  | 37 |  |  | (46) |  |  | 20 |  |  | (7) |
Non-cash transactions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable related to capital expenditures | 246 |  |  | 166 |  |  | 74 |  |  | 335 |  |  | 168 |  |  | 139 |  |  | 370 |  |  | 261 |  |  | 128 |
Fair value of Energy Transfer Common Units received for Enable Merger | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,672 |  |  | — |  |  | — |
Fair value of Energy Transfer Series G Preferred Units received for Enable Merger | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 385 |  |  | — |  |  | — |
ROU assets obtained in exchange for lease liabilities (2) | 3 |  |  | 1 |  |  | — |  |  | 7 |  |  | 6 |  |  | — |  |  | 2 |  |  | — |  |  | — |
(1) CenterPoint Energy’s $215 million income tax payments in 2023 were attributable to recovery of extraordinary gas costs incurred in the February 2021 Winter Storm through the Railroad Commission ordered securitization. (2) Excludes ROU assets obtained through prepayment of the lease liabilities. See Note 20. The table below provides a reconciliation of cash, cash equivalents and restricted cash reported in the Consolidated Balance Sheets to the amount reported in the Statements of Consolidated Cash Flows:
| December 31, 2023 |  | December 31, 2022
| CenterPoint Energy |  | Houston Electric |  | CERC |  | CenterPoint Energy |  | Houston Electric |  | CERC
| (in millions)
Cash and cash equivalents (1) | $ | 90 |  |  | $ | 76 |  |  | $ | 1 |  |  | $ | 74 |  |  | $ | 75 |  |  | $ | — |
Restricted cash included in Prepaid expenses and other current assets | 19 |  |  | 13 |  |  | — |  |  | 17 |  |  | 13 |  |  | — |
Total cash, cash equivalents and restricted cash shown in Statements of Consolidated Cash Flows | $ | 109 |  |  | $ | 89 |  |  | $ | 1 |  |  | $ | 91 |  |  | $ | 88 |  |  | $ | — |
(1)Cash and cash equivalents related to VIEs as of December 31, 2023 and 2022 included $90 million and $75 million, respectively, at CenterPoint Energy and $76 million and $75 million, respectively, at Houston Electric. Supplemental Disclosure of Balance Sheet Information Included in other current liabilities on CERC’s Consolidated Balance Sheets as of December 31, 2023 and 2022 was $118 million and $61 million, respectively, of credits related to customers on budget billing programs. Included in other current liabilities on Houston Electric’s Consolidated Balance Sheets as of December 31, 2023 and 2022 was $47 million and $35 million, respectively, of accrued contributions in aid of construction.

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