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REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | The following represents a disaggregation of revenue from contracts with customers for the years ended December 31, 2023, 2022 and 2021:
| For the Years Ended December 31, |
(In millions) | 2023 |  | 2022 |  | 2021 |
Regulated Distribution |  |  |  |  |  |
Retail generation and distribution services(1) |  |  |  |  |  |
Residential | $ | 6,583 |  |  | $ | 6,180 |  |  | $ | 5,713 |  |
Commercial | 2,600 |  |  | 2,499 |  |  | 2,284 |  |
Industrial | 1,298 |  |  | 1,338 |  |  | 1,091 |  |
Street lighting/Other | 105 |  |  | 85 |  |  | 75 |  |
Wholesale | 228 |  |  | 494 |  | 362 |
Other revenue from contracts with customers(2) | 113 |  |  | 104 |  | 119 |
Total revenues from contracts with customers | 10,927 |  |  | 10,700 |  |  | 9,644 |  |
Alternative Revenue Program(3) | — |  |  | — |  |  | (27) |  |
Other revenue unrelated to contracts with customers(4) | 111 |  |  | 101 |  | 94 |
Total Regulated Distribution | $ | 11,038 |  |  | $ | 10,801 |  |  | $ | 9,711 |  |
Regulated Transmission |  |  |  |  |  |
ATSI | $ | 968 |  |  | $ | 912 |  |  | $ | 799 |  |
TrAIL | 279 |  |  | 270 |  |  | 233 |  |
MAIT | 395 |  |  | 340 |  |  | 288 |  |
JCP&L | 205 |  |  | 203 |  |  | 164 |  |
MP, PE and WP | 202 |  |  | 138 |  | 124 |
Total revenues from contracts with customers | 2,049 |  |  | 1,863 |  |  | 1,608 |  |
Other revenue unrelated to contracts with customers | 5 |  |  | 5 |  |  | 10 |  |
Total Regulated Transmission | $ | 2,054 |  |  | $ | 1,868 |  |  | $ | 1,618 |  |
Corporate/Other and Reconciling Adjustments(5) |  |  |  |  |  |
Wholesale | $ | 11 |  |  | $ | 27 |  |  | $ | 14 |  |
Retail generation and distribution services(5) | (181) |  |  | (186) |  |  | (154) |  |
Other revenue unrelated to contracts with customers(5) | (52) |  |  | (51) |  |  | (57) |  |
Total Corporate/Other and Reconciling | $ | (222) |  |  | $ | (210) |  |  | $ | (197) |  |
FirstEnergy Total Revenues | $ | 12,870 |  |  | $ | 12,459 |  |  | $ | 11,132 |  |
(1) Includes approximately $58 million and $38 million as of December 31, 2022 and 2021, respectively, of customer refunds associated with the Ohio Stipulation that became effective in December 2021. See Note 13, “Regulatory Matters,” for further discussion. (2) Primarily includes amounts collected from customers to administer and repay securitization bonds and pole attachment revenue. (3) Reflects amount the Ohio Companies refunded to customers that was previously collected under decoupling mechanisms, with interest. (4) Primarily includes late payment charges and revenue from derivatives. (5) Includes eliminations and reconciling adjustments of inter-segment revenues.
Schedule of Receivables from customers | Billed and unbilled customer receivables as of December 31, 2023 and 2022, are included below.
|  | As of December 31,
Customer Receivables |  | 2023 |  | 2022 |
|  | (In millions)
Billed(1) |  | $ | 717 |  |  | $ | 674 |  |
Unbilled |  | 665 |  |  | 781 |  |
|  | 1,382 |  |  | 1,455 |  |
Less: Uncollectible Reserve |  | 64 |  |  | 137 |  |
Total Customer Receivables |  | $ | 1,318 |  |  | $ | 1,318 |  |
(1) Includes approximately $288 million and $290 million as of December 31, 2023 and 2022, respectively, that are past due by greater than 30 days.
Schedule of Activity in the allowance for uncollectible accounts on customer receivables | Activity in the allowance for uncollectible accounts on receivables for the years ended December 31, 2023, 2022 and 2021 are as follows:
(In millions) |  | 2023 |  | 2022 |  | 2021
Customer Receivables: |  |  |  |  |  |
Beginning of year balance |  | $ | 137 |  |  | $ | 159 |  |  | $ | 164 |
Charged to income(1) |  | 8 |  |  | 59 |  |  | 54 |
Charged to other accounts(2) |  | 34 |  |  | 62 |  |  | 42 |
Write-offs |  | (115) |  |  | (143) |  |  | (101) |
End of year balance |  | $ | 64 |  |  | $ | 137 |  |  | $ | 159 |
Other Receivables: |  |  |  |  |  |
Beginning of year balance |  | $ | 11 |  |  | $ | 10 |  |  | $ | 26 |
Charged to income |  | 7 |  |  | 4 |  |  | 3 |
Charged to other accounts(2) |  | (1) |  |  | 4 |  |  | 3 |
Write-offs |  | (2) |  |  | (7) |  |  | (22) |
End of year balance |  | $ | 15 |  |  | $ | 11 |  |  | $ | 10 |
(1) Customer receivable amounts charged to income for the years ended December 31, 2023, 2022, and 2021, include approximately $(15) million, $11 million, and $12 million, respectively, deferred for future recovery (refund). (2) Represents recoveries and reinstatements of accounts previously written off for uncollectible accounts.

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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