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Revenue Recognition and Allowance for Credit Losses (Tables) | 9 Months Ended
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Sep. 30, 2023
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | The following tables disaggregate revenues by reportable segment and major source: CenterPoint Energy
|  | Three Months Ended September 30, 2023
|  | Electric |  | Natural Gas |  | Corporate and Other |  | Total
|  | (in millions)
Revenue from contracts |  | $ | 1,274 |  |  | $ | 589 |  |  | $ | 1 |  |  | $ | 1,864 |
Other (1) |  | (13) |  |  | 8 |  |  | 1 |  |  | (4) |
Total revenues |  | $ | 1,261 |  |  | $ | 597 |  |  | $ | 2 |  |  | $ | 1,860 |
|  | Nine Months Ended September 30, 2023
|  | Electric |  | Natural Gas |  | Corporate and Other |  | Total
|  | (in millions)
Revenue from contracts |  | $ | 3,272 |  |  | $ | 3,100 |  |  | $ | 125 |  |  | $ | 6,497 |
Other (1) |  | (22) |  |  | 36 |  |  | 3 |  |  | 17 |
Total revenues |  | $ | 3,250 |  |  | $ | 3,136 |  |  | $ | 128 |  |  | $ | 6,514 |
|  | Three Months Ended September 30, 2022
|  | Electric |  | Natural Gas |  | Corporate and Other |  | Total
|  | (in millions)
Revenue from contracts |  | $ | 1,155 |  |  | $ | 686 |  |  | $ | 65 |  |  | $ | 1,906 |
Other (1) |  | (9) |  |  | 6 |  |  | — |  |  | (3) |
Total revenues |  | $ | 1,146 |  |  | $ | 692 |  |  | $ | 65 |  |  | $ | 1,903 |
|  | Nine Months Ended September 30, 2022
|  | Electric |  | Natural Gas |  | Corporate and Other |  | Total
|  | (in millions)
Revenue from contracts |  | $ | 3,113 |  |  | $ | 3,358 |  |  | $ | 182 |  |  | $ | 6,653 |
Other (1) |  | (21) |  |  | (24) |  |  | 2 |  |  | (43) |
Total revenues |  | $ | 3,092 |  |  | $ | 3,334 |  |  | $ | 184 |  |  | $ | 6,610 |
(1)Primarily consists of income from ARPs and leases. Total lease income was $2 million and $1 million for the three months ended September 30, 2023 and 2022, respectively, and $6 million and $5 million for the nine months ended September 30, 2023 and 2022, respectively. Houston Electric
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
|  | (in millions)
Revenue from contracts |  | $ | 1,100 |  |  | $ | 949 |  |  | $ | 2,821 |  |  | $ | 2,597 |
Other (1) |  | (17) |  |  | (14) |  |  | (37) |  |  | (35) |
Total revenues |  | $ | 1,083 |  |  | $ | 935 |  |  | $ | 2,784 |  |  | $ | 2,562 |
(1)Primarily consists of income from ARPs and leases. Lease income was not significant for the three and nine months ended September 30, 2023 and 2022. CERC
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
|  | (in millions)
Revenue from contracts |  | $ | 575 |  |  | $ | 667 |  |  | $ | 3,012 |  |  | $ | 3,257 |
Other (1) |  | 8 |  |  | 5 |  |  | 33 |  |  | (25) |
Total revenues |  | $ | 583 |  |  | $ | 672 |  |  | $ | 3,045 |  |  | $ | 3,232 |
(1)Primarily consists of income from ARPs and leases. Lease income was $1 million for both the three months ended September 30, 2023 and 2022. Lease income was $3 million and $2 million, respectively, for the nine months ended September 30, 2023 and 2022.
Schedule of Contract with Customer, Contract Asset, Contract Liability and Receivable | The opening and closing balances of accounts receivable, other accrued unbilled revenue, contract assets and contract liabilities from contracts with customers are as follows: CenterPoint Energy
| Accounts Receivable |  | Other Accrued Unbilled Revenues |  | Contract Assets |  | Contract Liabilities |
| (in millions) |
Opening balance as of December 31, 2022 | $ | 858 |  |  | $ | 764 |  |  | $ | 4 |  |  | $ | 45 |  |
Closing balance as of September 30, 2023 | 733 |  |  | 340 |  |  | — |  |  | 5 |  |
Decrease | $ | (125) |  |  | $ | (424) |  |  | $ | (4) |  | (1) | $ | (40) |  | (1) |
(1)Decrease primarily related to the completed sale of Energy Systems Group on June 30, 2023. The amount of revenue recognized during the nine-month period ended September 30, 2023 that was included in the opening contract liability was $2 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between CenterPoint Energy’s performance and the customer’s payment. Houston Electric
| Accounts Receivable |  | Other Accrued Unbilled Revenues |  |  |  | Contract Liabilities
| (in millions)
Opening balance as of December 31, 2022 | $ | 271 |  |  | $ | 142 |  |  |  |  | $ | 2 |
Closing balance as of September 30, 2023 | 459 |  |  | 182 |  |  |  |  | 5 |
Increase (decrease) | $ | 188 |  |  | $ | 40 |  |  |  |  | $ | 3 |
The amount of revenue recognized during the nine-month period ended September 30, 2023 that was included in the opening contract liability was $2 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between Houston Electric’s performance and the customer’s payment. CERC
| Accounts Receivable |  | Other Accrued Unbilled Revenues |  |  |  |
| (in millions) |  |
Opening balance as of December 31, 2022 | $ | 478 |  |  | $ | 573 |  |  |  |  |  |  |
Closing balance as of September 30, 2023 | 230 |  |  | 119 |  |  |  |  |  |  |
Decrease | $ | (248) |  |  | $ | (454) |  |  |  |  |  |  |
CERC does not have any opening or closing contract asset or contract liability balances.

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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