XML 174 R57.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Indexed Debt Securities [Abstract] |
Gain (Loss) on Securities | Gains and losses on equity securities, net of transaction costs, are recorded as Gain (loss) on equity securities in CenterPoint Energy’s Statements of Consolidated Income. The following table presents information on CenterPoint Energy's equity securities for each period indicated:
|  | Year Ended December 31,
|  | 2023 |  | 2022 |  | 2021
|  |  |  | (in millions) |  |
AT&T Common |  | $ | (17) |  |  | $ | (63) |  |  | $ | (43) |
Charter Common |  | 43 |  |  | (273) |  |  | (8) |
WBD Common |  | 5 |  |  | 23 |  |  | — |
Energy Transfer Common Units (1) |  | — |  |  | 95 |  |  | (124) |
Energy Transfer Series G Preferred Units (1) |  | — |  |  | (9) |  |  | 2 |
Other |  | — |  |  | — |  |  | 1 |
Total Gains (Losses) on Equity Securities |  | $ | 31 |  |  | $ | (227) |  |  | $ | (172) |
(1)In 2022, CenterPoint Energy completed the execution of its previously announced plan to exit the midstream sector by selling the remaining Energy Transfer Common Units and Energy Transfer Series G Preferred Units it held.
Debt Securities, Trading, and Equity Securities, FV-NI | CenterPoint Energy and its subsidiaries hold shares of certain securities detailed in the table below, which are classified as trading securities. Shares of AT&T Common, Charter Common and WBD Common are expected to be held to facilitate CenterPoint Energy’s ability to meet its obligation under the ZENS.
|  | Shares Held at December 31, |  | Carrying Value at December 31,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
|  |  |  |  |  | (in millions)
AT&T Common |  | 10,212,945 |  |  | 10,212,945 |  |  | $ | 171 |  |  | $ | 188 |
Charter Common |  | 872,503 |  |  | 872,503 |  |  | 339 |  |  | 296 |
WBD Common |  | 2,470,685 |  |  | 2,470,685 |  |  | 28 |  |  | 23 |
Other |  |  |  |  |  | 3 |  |  | 3 |
|  |  |  |  |  | $ | 541 |  |  | $ | 510 |
Summarized Financial Information on Investment in Time Warner Securities and Indexed Debt Security Obligation | CenterPoint Energy’s reference shares for each ZENS consisted of the following:
|  | December 31,
|  | 2023 |  | 2022
|  | (in shares)
AT&T Common |  | 0.7185 |  |  | 0.7185 |
Charter Common |  | 0.061382 |  |  | 0.061382 |
WBD Common |  | 0.173817 |  |  | 0.173817 |
The following table sets forth summarized financial information regarding CenterPoint Energy’s investment in ZENS-Related Securities and each component of CenterPoint Energy’s ZENS obligation.
| ZENS-Related Securities |  | Debt Component of ZENS |  | Derivative Component of ZENS
| (in millions)
Balance as of December 31, 2020 | $ | 871 |  |  | $ | 15 |  |  | $ | 953 |
Accretion of debt component of ZENS | — |  |  | 17 |  |  | — |
2% interest paid | — |  |  | (17) |  |  | — |
Distribution to ZENS holders | — |  |  | (5) |  |  | — |
Gain on indexed debt securities | — |  |  | — |  |  | (50) |
Loss on ZENS-Related Securities | (51) |  |  | — |  |  | — |
Balance as of December 31, 2021 | 820 |  |  | 10 |  |  | 903 |
Accretion of debt component of ZENS | — |  |  | 17 |  |  | — |
2% interest paid | — |  |  | (17) |  |  | — |
Distribution to ZENS holders | — |  |  | (3) |  |  | — |
Gain on indexed debt securities | — |  |  | — |  |  | (325) |
Loss on ZENS-Related Securities | (313) |  |  | — |  |  | — |
Balance as of December 31, 2022 | 507 |  |  | 7 |  |  | 578 |
Accretion of debt component of ZENS | — |  |  | 17 |  |  | — |
2% interest paid | — |  |  | (17) |  |  | — |
Distribution to ZENS holders | — |  |  | (2) |  |  | — |
Loss on indexed debt securities | — |  |  | — |  |  | 27 |
Gain on ZENS-Related Securities | 31 |  |  | — |  |  | — |
Balance as of December 31, 2023 | $ | 538 |  |  | $ | 5 |  |  | $ | 605 |

X
- Definition Indexed Debt Securities [Abstract] + References No definition available. + Details
Name: | cnp_IndexedDebtSecuritiesAbstract
Namespace Prefix: | cnp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Indexed Debt Securities and Marketable Securities [Table Text Block] + References No definition available. + Details
Name: | cnp_ScheduleOfIndexedDebtSecuritiesAndMarketableSecuritiesTableTextBlock
Namespace Prefix: | cnp_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of realized and unrealized gain (loss) on investment in security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_GainLossOnInvestmentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
Name: | us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration