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v3.23.2

Rate Matters and Regulation - Additional Information (Details) $ in Millions |  |  | 6 Months Ended
--- | --- | --- | ---
Jul. 12, 2023 USD ($) Turbine Megawattsday | May 31, 2023 USD ($) Megawattsday Turbine | Jun. 30, 2023 USD ($)
Estimated Refund to SPP |  |  | $ 13.0
ARKANSAS [Member] |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  | 9.6
Horseshoe Lake [Member] |  |  |
Number of hydrogen capable combustion turbines | Turbine |  | 2 |
Current energy generation capacity | Megawattsday |  | 448 |
Approximate construction cost of turbines excluding financing costs and property taxes |  | $ 331.0 |
Horseshoe Lake [Member] | Subsequent Event [Member] |  |  |
Number of hydrogen capable combustion turbines | Turbine | 2 |  |
Current energy generation capacity | Megawattsday | 448 |  |
Approximate construction cost of turbines excluding financing costs and property taxes | $ 331.0 |  |
Impact to Company [Member] |  |  |
Estimated Refund to SPP |  |  | 5.0
Customer Impact [Member] |  |  |
Estimated Refund to SPP |  |  | $ 8.0

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