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Commitments and Contingencies - Additional Information (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) Segment Turbine Megawattsday | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Utilities Operating Expense, Purchased Power under Long-term Contracts | $ |  | $ 48.8 | $ 58.0 | $ 55.8
Damages sought, description | In July 2023, OG&E was named, along with its contractor, as a defendant in a lawsuit filed by an apartment owner and its insurance companies seeking in excess of $60.0 million in damages related to a fire at an apartment building under construction in Oklahoma City. Several additional defendants have also been named. OG&E disputes the claims in the lawsuit and intends to vigorously defend this action. If OG&E was ultimately deemed liable for damages in connection with this incident, OG&E believes its existing insurance policies will cover its costs, in excess of a required retention (the amount of which is not material), to satisfy any liability it may have. Due to the uncertain and preliminary nature of this litigation, the outcome cannot be predicted, and OG&E is unable to provide a range of possible loss in this matter. |  |  |
Damage from Fire [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Damages sought | $ | $ 60.0 |  |  |
CPV Keenan [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Utilities Operating Expense, Purchased Power under Long-term Contracts | $ |  | 23.0 | 25.8 | 27.3
Edison Mission Energy [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Utilities Operating Expense, Purchased Power under Long-term Contracts | $ |  | 20.5 | 24.9 | 21.7
NextEra Energy [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Utilities Operating Expense, Purchased Power under Long-term Contracts | $ |  | $ 5.3 | $ 7.3 | $ 6.8
OG&E long-term service agreement commitments [Member] | McClain Plant [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Factored-Fired Hours | Segment |  | 128,000 |  |
Factored-Fired Starts | Segment |  | 4,800 |  |
OG&E long-term service agreement commitments [Member] | Redbud Plant [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Factored-Fired Hours | Segment |  | 144,000 |  |
Factored-Fired Starts | Segment |  | 4,500 |  |
Additional Factored-Fired Hours | Segment |  | 24,000 |  |
OG&E Generation Capacity Construction Commitments [Member] | Horseshoe Lake [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of hydrogen capable combustion turbines | Turbine |  | 2 |  |
Current energy generation capacity | Megawattsday |  | 448 |  |

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