REVENUE - Schedule of Receivables from Customers (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customers | $ 1,715 | $ 1,783 |
| Less: Uncollectible Reserve | 48 | 57 |
| Receivables | 1,667 | 1,726 |
| JCP&L | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customers | 371 | 330 |
| Less: Uncollectible Reserve | 5 | 6 |
| Receivables | 366 | 324 |
| Billed | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customers | 930 | 939 |
| Billed | JCP&L | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customers | 207 | 178 |
| Unbilled | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customers | 785 | 844 |
| Unbilled | JCP&L | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customers | $ 164 | $ 152 |