FAIR VALUE MEASUREMENTS (Schedule of Activity for Debt and Equity Securities) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||
| Proceeds from sales and maturities of nuclear decommissioning trust investments | $ 1,164 | $ 779 | ||
| Nuclear decommissioning trusts | ||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||
| Proceeds from sales and maturities of nuclear decommissioning trust investments | $ 764 | $ 501 | 1,164 | 779 |
| Gross realized gains on securities | 63 | 4 | 84 | 6 |
| Gross realized losses on securities | (6) | (11) | (14) | (17) |
| Customer credit trust | ||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||
| Proceeds from sales and maturities of nuclear decommissioning trust investments | 167 | 97 | 283 | 196 |
| Gross realized gains on securities | 0 | 2 | 5 | 5 |
| Gross realized losses on securities | $ 0 | $ (8) | $ (3) | $ (11) |