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Rate Matters and Regulation - Additional Information (Details) |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2026 Megawattsday | Nov. 26, 2024 USD ($) | Jun. 12, 2024 USD ($) | Mar. 07, 2024 USD ($) | Jan. 19, 2024 Megawattsday | Dec. 31, 2023 USD ($) | Jan. 31, 2023 | Dec. 31, 2028 Megawattsday | Dec. 31, 2027 Megawattsday | Dec. 31, 2024 USD ($)
Pre-tax weighted average cost of capital percentage |  |  |  |  |  |  | 6.49% |  |  |
Recovery of regulatory asset period |  |  |  |  |  |  | 10 years |  |  |
Estimated Refund to SPP |  |  |  |  |  |  |  |  |  | $ 14,000,000
Requested Recovery of Capital Investment |  |  |  |  |  | $ 1,300,000,000 |  |  |  |
Integrated Resource Plans [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |
Energy generation capacity | Megawattsday | 556 |  |  |  |  |  |  | 1,096 | 431 |
Oklahoma Corporation Commission [Member] |  |  |  |  |  |  |  |  |  |
OG&E's Jurisdictional Revenues |  |  |  |  |  |  |  |  |  | 87.00%
Arkansas Public Service Commission [Member] |  |  |  |  |  |  |  |  |  |
OG&E's Jurisdictional Revenues |  |  |  |  |  |  |  |  |  | 8.00%
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  | $ 3,500,000 |  |  |  |  |  |
Federal Energy Regulatory Commission [Member] |  |  |  |  |  |  |  |  |  |
OG&E's Jurisdictional Revenues |  |  |  |  |  |  |  |  |  | 5.00%
Arkansas 2024 Generation Construction Notice Filing |  |  |  |  |  |  |  |  |  |
Energy generation capacity | Megawattsday |  |  |  |  | 96 |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Vegetation management operation and maintenance expenses |  |  |  |  |  |  |  |  |  | $ 38,200,000
Regulatory asset |  |  |  |  |  |  |  |  |  | 7,500,000
Impact to Company [Member] |  |  |  |  |  |  |  |  |  |
Estimated Refund to SPP |  |  |  |  |  |  |  |  |  | 4,000,000
Customer Impact [Member] |  |  |  |  |  |  |  |  |  |
Estimated Refund to SPP |  |  |  |  |  |  |  |  |  | $ 10,000,000
OKLAHOMA [Member] |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  | $ 332,500,000 |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  | 9.50% |  |  |  | 10.50% |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | $ 126,700,000 | $ 126,700,000 |  |  |  |  |  |  |
Common Equity Percentage which ROE is based |  | 53.50% |  |  |  | 53.50% |  |  |  |
Total level of expense less than or greater than amount of annual base level of expense |  | $ 38,200,000 |  |  |  |  |  |  |  |
OKLAHOMA [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Vegetation management operation and maintenance expenses |  | 38,200,000 |  |  |  |  |  |  |  |
Regulatory asset |  | $ 7,500,000 |  |  |  |  |  |  |  |

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