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Regulatory Matters (Tables)
 3 Months Ended
Mar. 31, 2025
Regulated Operations [Abstract]  
Schedule of Allowed Equity Return Not Recognized The recoverable allowed equity return not yet recognized by the Registrants is as follows:
March 31, 2025December 31, 2024
CenterPoint Energy (1)Houston Electric (2)CERC (3)CenterPoint Energy (1)Houston Electric (2)CERC (3)
(in millions)
Unrecognized equity return
$276 $114 $97 $251 $94 $92 

(1)In addition to the amounts described in (2) and (3) below, represents CenterPoint Energy’s allowed equity return on post in-service carrying cost generally associated with investments at SIGECO.
(2)Represents Houston Electric’s allowed equity return on certain storm restoration balances.
(3)Represents CERC’s allowed equity return on post in-service carrying cost associated with certain distribution facilities replacement expenditures in Texas and Indiana Gas.
Schedule of Amount Allowed Equity Return Recognized in Period
The table below reflects the amount of allowed equity return recognized by each Registrant in its Condensed Statements of Consolidated Income:

Three Months Ended March 31,
20252024
CenterPoint EnergyHouston ElectricCERCCenterPoint EnergyHouston ElectricCERC
(in millions)
Allowed equity return recognized$2 $1 $1 $9 $8 $1