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Employee Benefit Plans
3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Employee Benefit Plans Employee Benefit Plans
The Registrants’ net periodic cost, before considering amounts subject to overhead allocations for capital expenditure projects or for amounts subject to deferral for regulatory purposes, includes the following components relating to pension and postretirement benefits:

Pension Benefits (CenterPoint Energy)
Three Months Ended March 31,
20222021
(in millions)
Service cost (1)
$$10 
Interest cost (2)
15 15 
Expected return on plan assets (2)
(25)(26)
Amortization of net loss (2)
Net periodic cost$$

(1)Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Condensed Statements of Consolidated Income, net of amounts capitalized and regulatory deferrals.
(2)Amounts presented in the table above are included in Other income, net in CenterPoint Energy’s Condensed Statements of Consolidated Income, net of regulatory deferrals.

Postretirement Benefits
Three Months Ended March 31,
20222021
CenterPoint EnergyHouston ElectricCERCCenterPoint EnergyHouston ElectricCERC
(in millions)
Service cost (1)
$$— $— $$— $— 
Interest cost (2)
Expected return on plan assets (2)
(1)(1)— (1)(1)— 
Amortization of prior service cost (credit) (2)
(1)(1)— (1)(1)— 
Amortization of net loss (2)
(1)(1)— — — — 
Net periodic cost (benefit)$— $(2)$$$(1)$

(1)Amounts presented in the tables above are included in Operation and maintenance expense in each of the Registrants’ respective Condensed Statements of Consolidated Income, net of amounts capitalized and regulatory deferrals.
(2)Amounts presented in the tables above are included in Other income (expense), net in each of the Registrants’ respective Condensed Statements of Consolidated Income, net of regulatory deferrals.
The table below reflects the expected contributions to be made to the pension and postretirement benefit plans during 2022:
CenterPoint EnergyHouston ElectricCERC
(in millions)
Expected minimum contribution to pension plans during 2022$$— $— 
Expected contribution to postretirement benefit plans in 2022

The table below reflects the contributions made to the pension and postretirement benefit plans during 2022:
Three Months Ended March 31, 2022
CenterPoint EnergyHouston ElectricCERC
(in millions)
Pension plans$$— $— 
Postretirement benefit plans— —