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Pension and Other Post-Employment Benefits (Tables) | 6 Months Ended
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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) |  | Pension | OPEB
For the Three Months Ended June 30, |  | 2022 |  | 2021 |  | 2022 |  | 2021
|  | (In millions)
Service costs |  | $ | 46 |  |  | $ | 48 |  |  | $ | 1 |  |  | $ | 1 |
Interest costs |  | 68 |  |  | 57 |  |  | 2 |  |  | 2 |
Expected return on plan assets |  | (164) |  |  | (163) |  |  | (10) |  |  | (7) |
Amortization of prior service costs (credits)(1) |  | — |  |  | 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) |  | Pension | OPEB
For the Six Months Ended June 30, |  | 2022 |  | 2021 |  | 2022 |  | 2021
|  | (In millions)
Service costs |  | $ | 92 |  |  | 97 |  |  | 2 |  |  | 2 |
Interest costs |  | 136 |  |  | 113 |  |  | 5 |  |  | 5 |
Expected return on plan assets |  | (328) |  |  | (326) |  |  | (20) |  |  | (17) |
Amortization or prior service costs (credits)(1) |  | 1 |  |  | 2 |  |  | (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.

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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