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DERIVATIVES (Volumes of Outstanding Derivative Contracts) (Details) | Mar. 31, 2024 MMBTU MWh | Dec. 31, 2023 MMBTU MWh
--- | --- | ---
Forwards, Futures and Swaps | Natural Gas (MMBtus) |  |
Derivative [Line Items] |  |
Contract Volume | 210,862,229 | 196,063,296
Forwards, Futures and Swaps | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | MWh | 8,392,963 | 9,169,967
Options | Natural Gas (MMBtus) |  |
Derivative [Line Items] |  |
Contract Volume | 31,407,500 | 30,695,000
Options | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | 646,800 | 92,400
Congested Revenue Rights | Electricity (MWh) |  |
Derivative [Line Items] |  |
Contract Volume | MWh | 162,810,719 | 170,465,674

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