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Regulatory Matters (Tables)
 3 Months Ended
Mar. 31, 2024
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, 2024December 31, 2023
CenterPoint Energy (1)Houston Electric (2)CERC (3)CenterPoint Energy (1)Houston Electric (2)CERC (3)
(in millions)
Unrecognized equity return
$204 $69 $73 $204 $75 $69 

(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 in Indiana.
(2)Represents Houston Electric’s allowed equity return on its true-up balance of stranded costs, other changes and related interest resulting from the formerly integrated electric utilities prior to Texas deregulation to be recovered in rates through 2024 and certain TEEEF costs and storm restoration costs.
(3)CERC’s allowed equity return on post in-service carrying cost associated with certain distribution facilities replacements expenditures in Texas and costs associated with investments in Indiana.
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,
20242023
CenterPoint EnergyHouston ElectricCERCCenterPoint EnergyHouston ElectricCERC
(in millions)
Allowed equity return recognized$9 $8 $1 $8 $7 $1