FAIR VALUE MEASUREMENTS (Schedule of Activity for Debt and Equity Securities) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||
| Proceeds from sales and maturities of nuclear decommissioning trust investments | $ 1,967 | $ 1,365 | ||
| Nuclear decommissioning trusts | ||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||
| Proceeds from sales and maturities of nuclear decommissioning trust investments | $ 803 | $ 586 | 1,967 | 1,365 |
| Gross realized gains on securities | 54 | 124 | 138 | 130 |
| Gross realized losses on securities | (28) | (4) | (42) | (21) |
| Customer credit trust | ||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||||
| Proceeds from sales and maturities of nuclear decommissioning trust investments | 157 | 114 | 440 | 310 |
| Gross realized gains on securities | 0 | 7 | 5 | 12 |
| Gross realized losses on securities | $ (1) | $ (3) | $ (4) | $ (14) |