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ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income | The changes in AOCI for the years ended December 31, 2022, 2021 and 2020, for FirstEnergy are shown in the following table:
|  | Gains & Losses on Cash Flow Hedges (1) |  |  |  | Defined Benefit Pension & OPEB Plans (2)(3) |  | Total
|  | (In millions)
AOCI Balance, January 1, 2020 |  | $ | (9) |  |  |  |  | $ | 29 |  |  | $ | 20 |
Amounts reclassified from AOCI |  | 1 |  |  |  |  | (34) |  |  | (33) |
Other comprehensive income (loss) |  | 1 |  |  |  |  | (34) |  |  | (33) |
Income tax (benefits) on other comprehensive income (loss) |  | — |  |  |  |  | (8) |  |  | (8) |
Other comprehensive income (loss), net of tax |  | 1 |  |  |  |  | (26) |  |  | (25) |
AOCI Balance, December 31, 2020 |  | $ | (8) |  |  |  |  | $ | 3 |  |  | $ | (5) |
Amounts reclassified from AOCI |  | 1 |  |  |  |  | (14) |  |  | (13) |
Other comprehensive income (loss) |  | 1 |  |  |  |  | (14) |  |  | (13) |
Income tax (benefits) on other comprehensive income (loss) |  | — |  |  |  |  | (3) |  |  | (3) |
Other comprehensive income (loss), net of tax |  | 1 |  |  |  |  | (11) |  |  | (10) |
AOCI Balance, December 31, 2021 |  | $ | (7) |  |  |  |  | $ | (8) |  |  | $ | (15) |
Amounts reclassified from AOCI |  | 9 |  |  |  |  | (9) |  |  | — |
Other comprehensive income (loss) |  | 9 |  |  |  |  | (9) |  |  | — |
Income tax (benefits) on other comprehensive income (loss) |  | 2 |  |  |  |  | (3) |  |  | (1) |
Other comprehensive income (loss), net of tax |  | 7 |  |  |  |  | (6) |  |  | 1 |
AOCI Balance, December 31, 2022 |  | $ | — |  |  |  |  | $ | (14) |  |  | $ | (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) 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 Post-Employment 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 Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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