Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) - Schedule of Gain (Loss) On Equity Securities (CenterPoint Energy) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2024 |
Jun. 30, 2023 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|
Debt and Equity Securities, FV-NI [Line Items] | ||||
Gain (loss) on equity securities | $ 19 | $ (31) | $ (64) | $ 7 |
AT&T Common | ||||
Debt and Equity Securities, FV-NI [Line Items] | ||||
Gain (loss) on equity securities | 15 | (34) | 24 | (25) |
Charter Common | ||||
Debt and Equity Securities, FV-NI [Line Items] | ||||
Gain (loss) on equity securities | 7 | 9 | (78) | 25 |
WBD Common | ||||
Debt and Equity Securities, FV-NI [Line Items] | ||||
Gain (loss) on equity securities | (3) | (6) | (10) | 8 |
Other | ||||
Debt and Equity Securities, FV-NI [Line Items] | ||||
Gain (loss) on equity securities | $ 0 | $ 0 | $ 0 | $ (1) |