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FAIR VALUE MEASUREMENTS (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets: |  |
Short-term investments |  | $ 289
Price risk management instruments, netting | $ 367 | 143
Price risk management instruments, assets | 1,497 | 370
TOTAL ASSETS | 7,127 | 5,558
Liabilities: |  |
Price risk management instruments, netting | (186) | (27)
TOTAL LIABILITIES | 229 | 242
Amount primarily related to deferred taxes on appreciation of investment value | 575 | 783
Short-term investments |  |
Assets: |  |
Short-term investments | 658 |
Fixed-income securities |  |
Assets: |  |
Short-term investments | 49 |
Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 117 | 22
Global equity securities | 1,845 | 2,504
Fixed-income securities | 1,885 | 2,024
TOTAL ASSETS | 3,872 | 4,581
Customer credit trust |  |
Assets: |  |
Short-term investments | 19 |
Global equity securities | 218 |
Fixed-income securities | 508 |
TOTAL ASSETS | 745 |
Rabbi trusts |  |
Assets: |  |
Short-term investments | 25 |
Global equity securities | 5 |
Fixed-income securities | 69 | 104
Life insurance contracts | 64 | 76
TOTAL ASSETS | 163 | 180
Long-term disability trust |  |
Assets: |  |
Short-term investments | 10 | 6
TOTAL ASSETS | 143 | 138
Price Risk Derivative, Electricity |  |
Assets: |  |
Price risk management instruments, netting | 40 | 6
Price risk management instruments, assets | 566 | 229
Liabilities: |  |
Price risk management instruments, netting | (20) | (24)
Price risk management instruments, liabilities | 223 | 235
Price Risk Derivative, Gas |  |
Assets: |  |
Price risk management instruments, netting | 327 | 137
Price risk management instruments, assets | 931 | 141
Liabilities: |  |
Price risk management instruments, netting | (166) | (3)
Price risk management instruments, liabilities | 6 | 7
Level 1 |  |
Assets: |  |
Short-term investments |  | 289
Price risk management instruments, gross subject to netting | 0 | 0
TOTAL ASSETS | 4,207 | 3,979
Liabilities: |  |
TOTAL LIABILITIES | 0 | 0
Level 1 | Short-term investments |  |
Assets: |  |
Short-term investments | 658 |
Level 1 | Fixed-income securities |  |
Assets: |  |
Short-term investments | 0 |
Level 1 | Nuclear decommissioning trusts |  |
Assets: |  |
Short-term investments | 117 | 22
Global equity securities | 1,845 | 2,504
Fixed-income securities | 1,094 | 1,158
TOTAL ASSETS | 3,056 | 3,684
Level 1 | Customer credit trust |  |
Assets: |  |
Short-term investments | 19 |
Global equity securities | 218 |
Fixed-income securities | 216 |
TOTAL ASSETS | 453 |
Level 1 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 25 |
Global equity securities | 5 |
Fixed-income securities | 0 | 0
Life insurance contracts | 0 | 0
TOTAL ASSETS | 30 | 0
Level 1 | Long-term disability trust |  |
Assets: |  |
Short-term investments | 10 | 6
TOTAL ASSETS | 10 | 6
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: |  |
Short-term investments |  | 0
Price risk management instruments, gross subject to netting | 698 | 13
TOTAL ASSETS | 1,963 | 1,059
Liabilities: |  |
TOTAL LIABILITIES | 182 | 21
Level 2 | Short-term investments |  |
Assets: |  |
Short-term investments | 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 | 791 | 866
TOTAL ASSETS | 791 | 866
Level 2 | Customer credit trust |  |
Assets: |  |
Short-term investments | 0 |
Global equity securities | 0 |
Fixed-income securities | 292 |
TOTAL ASSETS | 292 |
Level 2 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 0 |
Global equity securities | 0 |
Fixed-income securities | 69 | 104
Life insurance contracts | 64 | 76
TOTAL ASSETS | 133 | 180
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 | 94 | 9
Liabilities: |  |
Price risk management instruments, gross subject to netting | 10 | 11
Level 2 | Price Risk Derivative, Gas |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 604 | 4
Liabilities: |  |
Price risk management instruments, gross subject to netting | 172 | 10
Level 3 |  |
Assets: |  |
Short-term investments |  | 0
Price risk management instruments, gross subject to netting | 432 | 214
TOTAL ASSETS | 432 | 214
Liabilities: |  |
TOTAL LIABILITIES | 233 | 248
Level 3 | Short-term investments |  |
Assets: |  |
Short-term investments | 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 |
Global equity securities | 0 |
Fixed-income securities | 0 |
TOTAL ASSETS | 0 |
Level 3 | Rabbi trusts |  |
Assets: |  |
Short-term investments | 0 |
Global equity securities | 0 |
Fixed-income 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 | Price Risk Derivative, Electricity |  |
Assets: |  |
Price risk management instruments, gross subject to netting | 432 | 214
Liabilities: |  |
Price risk management instruments, gross subject to netting | 233 | 248
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 | 25 | 31
Fair Value Measured at Net Asset Value Per Share | Long-term disability trust |  |
Assets: |  |
Assets measured at NAV | $ 133 | $ 132

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