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FAIR VALUE MEASUREMENTS (Schedule of Maturities on Debt Securities) (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Nuclear decommissioning trusts |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total maturities of fixed-income securities | $ 4,734 | $ 4,291
Nuclear decommissioning trusts | Fixed-income securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 1 year | 46 |
1–5 years | 767 |
5–10 years | 511 |
More than 10 years | 999 |
Total maturities of fixed-income securities | 2,323 | 2,077
Customer credit trust |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total maturities of fixed-income securities | 446 | 233
Customer credit trust | Fixed-income securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 1 year | 0 |
1–5 years | 59 |
5–10 years | 45 |
More than 10 years | 114 |
Total maturities of fixed-income securities | $ 218 | $ 113

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