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DERIVATIVES (Volumes of Outstanding Derivative Contracts) (Details) | Jun. 30, 2023 MMBTU MWh | Dec. 31, 2022 MWh MMBTU
--- | --- | ---
Forwards, Futures and Swaps | Natural Gas (MMBtus) |  |
Derivative [Line Items] |  |
Contract Volume | 246,078,190 | 171,212,813
Forwards, Futures and Swaps | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | MWh | 9,389,471 | 10,814,728
Options | Natural Gas (MMBtus) |  |
Derivative [Line Items] |  |
Contract Volume | 44,745,000 | 27,785,000
Options | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | 277,200 | 215,600
Congestion revenue rights | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | MWh | 180,123,433 | 205,743,505

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