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FAIR VALUE MEASUREMENTS (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Assets: |  |
Price risk management instruments, netting | $ 20 | $ 367
Price risk management instruments, assets | 406 | 1,497
TOTAL ASSETS | 6,074 | 7,127
Liabilities: |  |
Price risk management instruments, netting | (28) | (186)
TOTAL LIABILITIES | 216 | 229
Amount primarily related to deferred taxes on appreciation of investment value | 654 | 575
Short-term investments |  |
Assets: |  |
Short-term investments | 723 | 658
Fixed-income securities |  |
Assets: |  |
Short-term investments |  | 49
Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 126 | 117
Global equity securities | 2,035 | 1,845
Fixed-income securities | 1,988 | 1,885
TOTAL ASSETS | 4,178 | 3,872
Customer credit trust |  |
Assets: |  |
Short-term investments | 7 | 19
Global equity securities | 148 | 218
Fixed-income securities | 321 | 508
TOTAL ASSETS | 476 | 745
Rabbi trusts |  |
Assets: |  |
Short-term investments | 97 | 25
Global equity securities | 5 | 5
Fixed-income securities |  | 69
Life insurance contracts | 65 | 64
TOTAL ASSETS | 167 | 163
Long-term disability trust |  |
Assets: |  |
Short-term investments | 7 | 10
TOTAL ASSETS | 124 | 143
Price Risk Derivative, Electricity |  |
Assets: |  |
Price risk management instruments, netting | 11 | 40
Price risk management instruments, assets | 369 | 566
Liabilities: |  |
Price risk management instruments, netting | (26) | (20)
Price risk management instruments, liabilities | 209 | 223
Price Risk Derivative, Gas |  |
Assets: |  |
Price risk management instruments, netting | 9 | 327
Price risk management instruments, assets | 37 | 931
Liabilities: |  |
Price risk management instruments, netting | (2) | (166)
Price risk management instruments, liabilities | 7 | 6
Level 1 |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 0 | 0
TOTAL ASSETS | 4,428 | 4,207
Liabilities: |  |
TOTAL LIABILITIES | 0 | 0
Level 1 | Short-term investments |  |
Assets: |  |
Short-term investments | 723 | 658
Level 1 | Fixed-income securities |  |
Assets: |  |
Short-term investments |  | 0
Level 1 | Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 126 | 117
Global equity securities | 2,035 | 1,845
Fixed-income securities | 1,195 | 1,094
TOTAL ASSETS | 3,356 | 3,056
Level 1 | Customer credit trust |  |
Assets: |  |
Short-term investments | 7 | 19
Global equity securities | 148 | 218
Fixed-income securities | 85 | 216
TOTAL ASSETS | 240 | 453
Level 1 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 97 | 25
Global equity securities | 5 | 5
Fixed-income securities |  | 0
Life insurance contracts | 0 | 0
TOTAL ASSETS | 102 | 30
Level 1 | Long-term disability trust |  |
Assets: |  |
Short-term investments | 7 | 10
TOTAL ASSETS | 7 | 10
Level 1 | Price Risk Derivative, 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 | Price Risk Derivative, 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 | 56 | 698
TOTAL ASSETS | 1,150 | 1,963
Liabilities: |  |
TOTAL LIABILITIES | 40 | 182
Level 2 | Short-term investments |  |
Assets: |  |
Short-term investments | 0 | 0
Level 2 | Fixed-income securities |  |
Assets: |  |
Short-term investments |  | 49
Level 2 | Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Fixed-income securities | 793 | 791
TOTAL ASSETS | 793 | 791
Level 2 | Customer credit trust |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Fixed-income securities | 236 | 292
TOTAL ASSETS | 236 | 292
Level 2 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 0 | 0
Global equity securities | 0 | 0
Fixed-income securities |  | 69
Life insurance contracts | 65 | 64
TOTAL ASSETS | 65 | 133
Level 2 | Long-term disability trust |  |
Assets: |  |
Short-term investments | 0 | 0
TOTAL ASSETS | 0 | 0
Level 2 | Price Risk Derivative, Electricity |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 28 | 94
Liabilities: |  |
Price risk management instruments, gross subject to netting | 31 | 10
Level 2 | Price Risk Derivative, Gas |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 28 | 604
Liabilities: |  |
Price risk management instruments, gross subject to netting | 9 | 172
Level 3 |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 330 | 432
TOTAL ASSETS | 330 | 432
Liabilities: |  |
TOTAL LIABILITIES | 204 | 233
Level 3 | Short-term investments |  |
Assets: |  |
Short-term investments | 0 | 0
Level 3 | Fixed-income securities |  |
Assets: |  |
Short-term investments |  | 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
Fixed-income securities |  | 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 | Price Risk Derivative, Electricity |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 330 | 432
Liabilities: |  |
Price risk management instruments, gross subject to netting | 204 | 233
Level 3 | Price Risk Derivative, Gas |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Liabilities: |  |
Price risk management instruments, gross subject to netting | 0 | 0
Fair Value Measured at Net Asset Value Per Share | Nuclear decommissioning trusts |  |
Assets: |  |
Assets measured at NAV | 29 | 25
Fair Value Measured at Net Asset Value Per Share | Long-term disability trust |  |
Assets: |  |
Assets measured at NAV | $ 117 | $ 133

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