Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) - Schedule of Reference Shares (Details) - Subordinated Debt, ZENS, Due 2029 - shares |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| AT&T Common | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Number of shares referenced in exchangeable subordinated note (in shares) | 0.7185 | 0.7185 |
| Charter Common | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Number of shares referenced in exchangeable subordinated note (in shares) | 0.061382 | 0.061382 |
| WBD Common | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Number of shares referenced in exchangeable subordinated note (in shares) | 0.173817 | 0.173817 |