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FAIR VALUE MEASUREMENTS (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Assets: |  |
Price risk management instruments, netting | $ (9) | $ (16)
Price risk management instruments, assets | 416 | 403
TOTAL ASSETS | 9,087 | 7,404
Liabilities: |  |
Price risk management instruments, netting | (12) | (16)
TOTAL LIABILITIES | 269 | 303
Amount primarily related to deferred taxes on appreciation of investment value | 744 | 747
Short-term investments |  |
Assets: |  |
Short-term investments | 1,870 | 826
PERS |  |
Assets: |  |
Short-term investments | 939 | 905
TOTAL ASSETS | 939 | 905
Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 60 | 53
Global equity securities | 2,184 | 2,228
Fixed-income securities | 2,333 | 2,277
TOTAL ASSETS | 4,598 | 4,580
Customer credit trust |  |
Assets: |  |
Short-term investments | 16 | 1
Global equity securities | 465 | 186
Fixed-income securities | 468 | 190
TOTAL ASSETS | 949 | 377
Rabbi trusts |  |
Assets: |  |
Short-term investments | 109 | 107
Global equity securities | 5 | 6
Life insurance contracts | 67 | 66
TOTAL ASSETS | 181 | 179
Long-term disability trust |  |
Assets: |  |
Short-term investments | 6 | 4
TOTAL ASSETS | 134 | 134
Electricity |  |
Assets: |  |
Price risk management instruments, netting | (2) | (6)
Price risk management instruments, assets | 407 | 403
Liabilities: |  |
Price risk management instruments, netting | (5) | (6)
Price risk management instruments, liabilities | 269 | 279
Gas |  |
Assets: |  |
Price risk management instruments, netting | (7) | (10)
Price risk management instruments, assets | 9 | 0
Liabilities: |  |
Price risk management instruments, netting | (7) | (10)
Price risk management instruments, liabilities | 0 | 24
Level 1 |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 0 | 0
TOTAL ASSETS | 7,126 | 5,612
Liabilities: |  |
TOTAL LIABILITIES | 0 | 0
Level 1 | Short-term investments |  |
Assets: |  |
Short-term investments | 1,870 | 826
Level 1 | PERS |  |
Assets: |  |
Short-term investments | 939 | 905
TOTAL ASSETS | 939 | 905
Level 1 | Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 60 | 53
Global equity securities | 2,184 | 2,228
Fixed-income securities | 1,271 | 1,250
TOTAL ASSETS | 3,515 | 3,531
Level 1 | Customer credit trust |  |
Assets: |  |
Short-term investments | 16 | 1
Global equity securities | 465 | 186
Fixed-income securities | 201 | 46
TOTAL ASSETS | 682 | 233
Level 1 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 109 | 107
Global equity securities | 5 | 6
Life insurance contracts | 0 | 0
TOTAL ASSETS | 114 | 113
Level 1 | Long-term disability trust |  |
Assets: |  |
Short-term investments | 6 | 4
TOTAL ASSETS | 6 | 4
Level 1 | Electricity |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Liabilities: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Level 1 | Gas |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Liabilities: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Level 2 |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 55 | 36
TOTAL ASSETS | 1,451 | 1,273
Liabilities: |  |
TOTAL LIABILITIES | 37 | 71
Level 2 | Short-term investments |  |
Assets: |  |
Short-term investments | 0 | 0
Level 2 | PERS |  |
Assets: |  |
Short-term investments | 0 | 0
TOTAL ASSETS | 0 | 0
Level 2 | Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Fixed-income securities | 1,062 | 1,027
TOTAL ASSETS | 1,062 | 1,027
Level 2 | Customer credit trust |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Fixed-income securities | 267 | 144
TOTAL ASSETS | 267 | 144
Level 2 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Life insurance contracts | 67 | 66
TOTAL ASSETS | 67 | 66
Level 2 | Long-term disability trust |  |
Assets: |  |
Short-term investments | 0 | 0
TOTAL ASSETS | 0 | 0
Level 2 | Electricity |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 39 | 26
Liabilities: |  |
Price risk management instruments, gross subject to netting | 30 | 37
Level 2 | Gas |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 16 | 10
Liabilities: |  |
Price risk management instruments, gross subject to netting | 7 | 34
Level 3 |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 370 | 383
TOTAL ASSETS | 370 | 383
Liabilities: |  |
TOTAL LIABILITIES | 244 | 248
Level 3 | Short-term investments |  |
Assets: |  |
Short-term investments | 0 | 0
Level 3 | PERS |  |
Assets: |  |
Short-term investments | 0 | 0
TOTAL ASSETS | 0 | 0
Level 3 | Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Fixed-income securities | 0 | 0
TOTAL ASSETS | 0 | 0
Level 3 | Customer credit trust |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Fixed-income securities | 0 | 0
TOTAL ASSETS | 0 | 0
Level 3 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Life insurance contracts | 0 | 0
TOTAL ASSETS | 0 | 0
Level 3 | Long-term disability trust |  |
Assets: |  |
Short-term investments | 0 | 0
TOTAL ASSETS | 0 | 0
Level 3 | Electricity |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 370 | 383
Liabilities: |  |
Price risk management instruments, gross subject to netting | 244 | 248
Level 3 | Gas |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Liabilities: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Assets measured at NAV | Nuclear decommissioning trusts |  |
Assets: |  |
Assets measured at NAV | 21 | 22
Assets measured at NAV | Long-term disability trust |  |
Assets: |  |
Assets measured at NAV | $ 128 | $ 130

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