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FAIR VALUE MEASUREMENTS (Schedule of Unrealized Gains Losses Related to Available-for-sale Investments) (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amount primarily related to deferred taxes on appreciation of investment value | $ 766 | $ 717
Nuclear decommissioning trusts |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,658 | 2,536
Total Unrealized Gains | 1,946 | 1,852
Total Unrealized Losses | (98) | (97)
Total Fair Value | 4,506 | 4,291
Nuclear decommissioning trusts | Short-term investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 38 | 52
Total Unrealized Gains | 0 | 0
Total Unrealized Losses | 0 | 0
Total Fair Value | 38 | 52
Nuclear decommissioning trusts | Global equity securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 361 | 381
Total Unrealized Gains | 1,918 | 1,792
Total Unrealized Losses | (11) | (11)
Total Fair Value | 2,268 | 2,162
Nuclear decommissioning trusts | Fixed-income securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,259 | 2,103
Total Unrealized Gains | 28 | 60
Total Unrealized Losses | (87) | (86)
Total Fair Value | 2,200 | 2,077
Customer credit trust |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 492 | 216
Total Unrealized Gains | 15 | 18
Total Unrealized Losses | (2) | (1)
Total Fair Value | 505 | 233
Customer credit trust | Short-term investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 348 | 49
Total Unrealized Gains | 0 | 0
Total Unrealized Losses | 0 | 0
Total Fair Value | 348 | 49
Customer credit trust | Global equity securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 35 | 56
Total Unrealized Gains | 15 | 16
Total Unrealized Losses | (1) | (1)
Total Fair Value | 49 | 71
Customer credit trust | Fixed-income securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 109 | 111
Total Unrealized Gains | 0 | 2
Total Unrealized Losses | (1) | 0
Total Fair Value | $ 108 | $ 113

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