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REVENUE (Tables) | 9 Months Ended
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Sep. 30, 2024
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | The following represents a disaggregation of revenue from contracts with customers for the three and nine months ended September 30, 2024 and 2023:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Distribution |  |  |  |  |  |  |  |
Retail generation and distribution services |  |  |  |  |  |  |  |
Residential |  | $ | 1,222 |  |  | $ | 1,174 |  |  | $ | 3,460 |  |  | $ | 3,312 |
Commercial |  | 395 |  |  | 405 |  |  | 1,153 |  |  | 1,156 |
Industrial |  | 138 |  |  | 150 |  |  | 437 |  |  | 575 |
Other |  | 18 |  |  | 18 |  |  | 56 |  |  | 52 |
Wholesale |  | 2 |  |  | 7 |  |  | 4 |  |  | 20 |
Other revenue from contracts with customers |  | 23 |  |  | 23 |  | 63 |  |  | 69
Total revenues from contracts with customers |  | 1,798 |  |  | 1,777 |  |  | 5,173 |  |  | 5,184 |
Other revenue unrelated to contracts with customers |  | 19 |  |  | 18 |  | 59 |  |  | 55
Total Distribution |  | $ | 1,817 |  |  | $ | 1,795 |  |  | $ | 5,232 |  |  | $ | 5,239 |
Integrated |  |  |  |  |  |  |  |
Retail generation and distribution services |  |  |  |  |  |  |  |
Residential |  | $ | 802 |  |  | $ | 692 |  |  | $ | 1,954 |  |  | $ | 1,621 |
Commercial |  | 335 |  |  | 281 |  |  | 863 |  |  | 777 |
Industrial |  | 151 |  |  | 140 |  |  | 436 |  |  | 408 |
Other |  | 8 |  |  | 9 |  |  | 22 |  |  | 23 |
Wholesale |  | 50 |  |  | 58 |  |  | 118 |  |  | 153 |
Transmission |  | 86 |  |  | 74 |  | 283 |  |  | 224
Other revenue from contracts with customers |  | 5 |  |  | 5 |  |  | 18 |  |  | 17 |
Total revenues from contracts with customers |  | 1,437 |  |  | 1,259 |  |  | 3,694 |  |  | 3,223 |
Other revenue unrelated to contracts with customers |  | 15 |  |  | 7 |  | 31 |  |  | 27
Total Integrated |  | $ | 1,452 |  |  | $ | 1,266 |  |  | $ | 3,725 |  |  | $ | 3,250 |
Stand-Alone Transmission |  |  |  |  |  |  |  |
ATSI |  | $ | 262 |  |  | $ | 245 |  |  | $ | 766 |  |  | $ | 712 |
TrAIL |  | 68 |  |  | 72 |  |  | 206 |  |  | 204 |
MAIT |  | 116 |  |  | 101 |  |  | 330 |  |  | 288 |
KATCo |  | 24 |  |  | 16 |  |  | 67 |  |  | 58 |
Other |  | — |  |  | — |  |  | (2) |  |  | — |
Total revenues from contracts with customers |  | 470 |  |  | 434 |  |  | 1,367 |  |  | 1,262 |
Other revenue unrelated to contracts with customers |  | 5 |  |  | 5 |  |  | 14 |  |  | 13 |
Total Stand-Alone Transmission |  | $ | 475 |  |  | $ | 439 |  |  | $ | 1,381 |  |  | $ | 1,275 |
Corporate/Other, Eliminations and Reconciling Adjustments |  |  |  |  |  |  |  |
Wholesale |  | $ | 2 |  |  | $ | 1 |  |  | $ | 6 |  |  | $ | 6 |
Eliminations and reconciling adjustments |  | (17) |  |  | (14) |  |  | (48) |  |  | (46) |
Total Corporate/Other, Eliminations and Reconciling Adjustments |  | $ | (15) |  |  | $ | (13) |  |  | $ | (42) |  |  | $ | (40) |
FirstEnergy Total Revenues |  | $ | 3,729 |  |  | $ | 3,487 |  |  | $ | 10,296 |  |  | $ | 9,724 |
Schedule of Receivables from Customers | Billed and unbilled customer receivables as of September 30, 2024, and December 31, 2023, are included below:
Customer Receivables |  | September 30, 2024 |  | December 31, 2023 |
|  | (In millions)
Billed |  | $ | 955 |  |  | $ | 717 |  |
Unbilled |  | 604 |  |  | 665 |  |
|  | 1,559 |  |  | 1,382 |  |
Less: Uncollectible Reserve |  | 49 |  |  | 64 |  |
Total Customer Receivables |  | $ | 1,510 |  |  | $ | 1,318 |  |
Schedule of Activity in the Allowance for Uncollectible Accounts on Customer Receivables | Activity in the allowance for uncollectible accounts on customer receivables for the nine months ended September 30, 2024, and for the year ended December 31, 2023 are as follows:
|  | (In millions)
Balance, January 1, 2023 |  | $ | 137 |
Provision for expected credit losses(1) |  | 8 |
Charged to other accounts(2) |  | 34 |
Write-offs |  | (115) |
Balance, December 31, 2023 |  | $ | 64 |
Provision for expected credit losses(1) |  | 40 |
Charged to other accounts(2) |  | 27 |
Write-offs |  | (82) |
Balance, September 30, 2024 |  | $ | 49 |
(1) Approximately $7 million and $(15) million of which was deferred for future recovery (refund) in the nine months ended September 30, 2024 and the year ended December 31, 2023, respectively. (2) Represents recoveries and reinstatements of accounts written off for uncollectible accounts.

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