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DERIVATIVES (Volumes of Outstanding Derivative Contracts) (Details) | Dec. 31, 2022 MWh MMBTU | Dec. 31, 2021 MWh MMBTU
--- | --- | ---
Forwards, Futures and Swaps | Natural Gas (MMBtus) |  |
Derivative [Line Items] |  |
Contract Volume | 171,212,813 | 173,361,635
Forwards, Futures and Swaps | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | MWh | 10,814,728 | 10,283,639
Options | Natural Gas (MMBtus) |  |
Derivative [Line Items] |  |
Contract Volume | 27,785,000 | 14,420,000
Options | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | 215,600 | 288,000
Congestion revenue rights | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | MWh | 205,743,505 | 239,857,610

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