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Regulatory Matters (Tables)
 9 Months Ended
Sep. 30, 2022
Regulatory Assets and Liabilities, Other Disclosure [Abstract]  
Schedule of Allowed Equity Return Not Recognized The recoverable allowed equity return not yet recognized by the Registrants is as follows:
September 30, 2022December 31, 2021
CenterPoint Energy (1)
Houston Electric (2)
CERC (3)
CenterPoint Energy (1)
Houston Electric (2)
CERC (3)
(in millions)
Allowed equity return not recognized$185 $83 $52 $199 $100 $51 

(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 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 storm restoration and TEEEF balances pending recovery in the next rate proceeding. The actual amounts recognized are adjusted at least annually to correct any over-collections or under-collections during the preceding 12 months.
(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 September 30,
20222021
CenterPoint EnergyHouston ElectricCERCCenterPoint EnergyHouston ElectricCERC
(in millions)
Allowed equity return recognized$14 $12 $1 $12 $11 $— 
Nine Months Ended September 30,
20222021
CenterPoint EnergyHouston ElectricCERCCenterPoint EnergyHouston ElectricCERC
(in millions)
Allowed equity return recognized$36 $33 $2 $31 $29 $1