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Pension and Other Post-Employment Benefits (Tables)
9 Months Ended
Sep. 30, 2022
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Costs
The components of FirstEnergy’s net periodic benefit costs (credits) for pension and OPEB were as follows:
Components of Net Periodic Benefit Costs (Credits)PensionOPEB
For the Three Months Ended September 30,2022202120222021
 (In millions)
Service costs $46 $48 $$
Interest costs 68 57 
Expected return on plan assets(164)(163)(10)(10)
Amortization of prior service costs (credits)(1)
(3)(4)
Net periodic benefit credits$(49)$(57)$(9)$(10)
Net periodic benefit credits, net of amounts capitalized $(77)$(80)$(9)$(10)
(1) The income tax benefits associated with pension and OPEB prior service costs amortized out of AOCI were $1 million for the three months ended September 30, 2022 and 2021.
Components of Net Periodic Benefit Costs (Credits)PensionOPEB
For the Nine Months Ended September 30, 2022202120222021
(In millions)
Service costs$138 145 
Interest costs204 170 
Expected return on plan assets (492)(489)(30)(27)
Amortization or prior service costs (credits)(1)
(8)(13)
Net periodic benefit credits$(148)$(171)$(27)$(29)
Net periodic benefit credits, net of amounts capitalized$(218)$(243)$(28)$(30)
(1) The income tax benefits associated with the pension and OPEB prior service costs amortized out of AOCI were $2 million and $3 million for the nine months ended September 30, 2022 and 2021, respectively.