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ACQUISITIONS AND DISPOSITIONS - Schedule of Asset Acquisitions (Details) - Southern Power $ in Millions | 2 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 14, 2024 MW | Dec. 31, 2023 USD ($) MW | Dec. 31, 2021 MW
Deuel Harvest |  |  |
Asset Acquisition [Line Items] |  |  |
Approximate Nameplate Capacity (MW) |  |  | 300
Deuel Harvest | Maximum |  |  |
Asset Acquisition [Line Items] |  |  |
PPA Contract Period |  |  | 25 years
Deuel Harvest | Minimum |  |  |
Asset Acquisition [Line Items] |  |  |
PPA Contract Period |  |  | 15 years
Deuel Harvest | Deuel Harvest |  |  |
Asset Acquisition [Line Items] |  |  |
Ownership Percentage |  |  | 100.00%
Millers Branch |  |  |
Asset Acquisition [Line Items] |  |  |
Approximate Nameplate Capacity (MW) |  | 200 |
Ownership Percentage |  | 10000.00% |
PPA Contract Period |  | 20 years |
Millers Branch | Maximum |  |  |
Asset Acquisition [Line Items] |  |  |
Addition to nameplate capacity |  | 300 |
Millers Branch | Maximum | Subsequent Event |  |  |
Asset Acquisition [Line Items] |  |  |
Addition to nameplate capacity | 205 |  |
South Cheyenne |  |  |
Asset Acquisition [Line Items] |  |  |
Approximate Nameplate Capacity (MW) |  | 150 |
Ownership Percentage |  | 10000.00% |
PPA Contract Period |  | 20 years |
South Cheyenne Solar Facility and Millers Branch Solar Development |  |  |
Asset Acquisition [Line Items] |  |  |
Payments to acquire businesses | $ |  | $ 193 |

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