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Related Party Transactions (Houston Electric and CERC) (Tables)
 3 Months Ended
Mar. 31, 2024
Related Party Transactions [Abstract]  
Schedule of Money Pool Investment and Borrowing
The table below summarizes CenterPoint Energy money pool activity:

March 31, 2024December 31, 2023
Houston ElectricCERC
Houston Electric
CERC
 (in millions, except interest rates)
Money pool investments (borrowings) (1)$573 $— $238 $1 
Weighted average interest rate5.55 %— %5.59 %5.59 %

(1)Included in Accounts and notes receivable (payable)–affiliated companies on Houston Electric’s and CERC’s respective Condensed Consolidated Balance Sheets, as applicable.
Schedule of Related Party Transactions
Amounts charged for these services were as follows and are included primarily in Operation and maintenance expenses on the Condensed Statements of Consolidated Income:
Three Months Ended March 31,
20242023
Houston ElectricCERCHouston ElectricCERC
(in millions)
Corporate service charges$35 $51 $35 $50 
Net affiliate service charges (billings)(1)1 (3)3 

The table below presents transactions among Houston Electric, CERC and their parent, Utility Holding:
Three Months Ended March 31,
20242023
Houston ElectricCERCHouston ElectricCERC
(in millions)
Cash dividends paid to parent$36 $115 $51 $204 
Cash contribution from parent 230 — 650 —