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ACCUMULATED OTHER COMPREHENSIVE INCOME | 12 Months Ended
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Dec. 31, 2024
Equity [Abstract] |
ACCUMULATED OTHER COMPREHENSIVE INCOME | ACCUMULATED OTHER COMPREHENSIVE INCOME The changes in AOCI for the years ended December 31, 2024, 2023 and 2022, for FirstEnergy are shown in the following table:
|  | 2024 |  | 2023 |  | 2022
|  | (In millions)
Gains & Losses on Cash Flow Hedges(1) |  |  |  |  |  |
AOCI Balance, January 1, |  | $ | 2 |  |  | $ | — |  |  | $ | (7) |
Amounts reclassified from AOCI |  | 3 |  |  | 2 |  |  | 9 |
Income tax on other comprehensive income |  | 1 |  |  | — |  |  | 2 |
Other comprehensive income, net of tax |  | 2 |  |  | 2 |  |  | 7 |
AOCI Balance, December 31, |  | $ | 4 |  |  | $ | 2 |  |  | $ | — |
Defined Benefit Pension & OPEB Plans(2)(3) |  |  |  |  |  |
AOCI Balance, January 1, |  | $ | (19) |  |  | $ | (14) |  |  | $ | (8) |
Amounts reclassified from AOCI |  | 1 |  |  | (6) |  |  | (9) |
Income tax benefits on other comprehensive loss |  | — |  |  | (1) |  |  | (3) |
Other comprehensive loss, net of tax |  | 1 |  |  | (5) |  |  | (6) |
AOCI Balance, December 31, |  | $ | (18) |  |  | $ | (19) |  |  | $ | (14) |
Total FirstEnergy Corp. AOCI |  |  |  |  |  |
AOCI Balance, January 1, |  | $ | (17) |  |  | $ | (14) |  |  | $ | (15) |
Other comprehensive income (loss), net of tax |  | 3 |  |  | (3) |  |  | 1 |
AOCI Balance, December 31, |  | $ | (14) |  |  | $ | (17) |  |  | $ | (14) |
(1) Relates to previous cash flow hedges used to hedge fixed rate long-term debt securities prior to their issuance. Amounts reclassified from AOCI affects Interest expense line item in Consolidated Statements of Income. (2) Amortization of prior service costs are reported within Miscellaneous income, net within Other Income (Expense) on FirstEnergy’s Consolidated Statements of Income. Components are included in the computation of net periodic cost (credits), see Note 5, "Pension and Other Postemployment Benefits," for additional details. (3) Income tax (benefits) on other comprehensive income (loss) affects Income taxes line item in Consolidated Statements of Income.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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