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DERIVATIVE ASSET (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Luminant Power Agreement |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Termination notice period |  |  | 6 months |
Luminant Power Agreement |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Power sales | $ 1.4 | $ 2.7 | $ 3.7 | $ 8.5
Luminant Power Agreement | Luminant ET Services Company LLC |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Term of power agreement |  |  | 5 years |

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