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Pension and Other Post-Employment Benefits (Tables)
6 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
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 June 30,2022202120222021
 (In millions)
Service costs $46 $48 $$
Interest costs 68 57 
Expected return on plan assets(164)(163)(10)(7)
Amortization of prior service costs (credits)(1)
— (2)(5)
Net periodic benefit credits$(50)$(57)$(9)$(9)
Net periodic benefit credits, net of amounts capitalized $(72)$(85)$(10)$(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 June 30, 2021.

Components of Net Periodic Benefit Costs (Credits)PensionOPEB
For the Six Months Ended June 30, 2022202120222021
(In millions)
Service costs$92 97 
Interest costs136 113 
Expected return on plan assets (328)(326)(20)(17)
Amortization or prior service costs (credits)(1)
(5)(9)
Net periodic benefit credits$(99)$(114)$(18)$(19)
Net periodic benefit credits, net of amounts capitalized$(141)$(163)$(19)$(20)
(1) The income tax benefits associated with the pension and OPEB prior service costs amortized out of AOCI were $1 million and $2 million for the six months ended June 30, 2022 and 2021, respectively.