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RATE MATTERS - PSO Rate Matters (Details) - 2024 Oklahoma Base Rate Case - PSO $ in Millions | 1 Months Ended
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Oct. 31, 2024 USD ($) | Jan. 31, 2024 USD ($) MW
Public Utilities, General Disclosures [Line Items] |  |
Requested annual base rate increase |  | $ 218
Requested return on equity |  | 10.80%
Requested debt capital structure |  | 48.90%
Requested equity capital structure |  | 51.10%
Generation Capacity (MWs) | MW |  | 155
Settlement agreement annual increase | $ 120 |
Settlement agreement return on common equity | 9.50% |
Settlement agreement debt capital structure | 48.90% |
Settlement agreement equity capital structure | 51.10% |
Interim annual base rate increase | $ 120 |

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