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v3.25.3

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) - Schedule of Securities Classified as Trading (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Carrying Value | $ 579 | $ 561
AT&T Common |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Balance of investment owned (in shares) | 10,212,945 | 10,212,945
Carrying Value | $ 288 | $ 233
Charter Common |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Balance of investment owned (in shares) | 872,503 | 872,503
Carrying Value | $ 240 | $ 299
WBD Common |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Balance of investment owned (in shares) | 2,470,685 | 2,470,685
Carrying Value | $ 48 | $ 26
Other |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Carrying Value | $ 3 | $ 3

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