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Common Equity - Common Stock Public Offering and Forward Equity Sale Agreements - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Nov. 20, 2025 | Jun. 30, 2026 | Jun. 30, 2026
Forward equity sale agreements [Member] |  |  |
Number of shares issued | 4,613,372 |  |
Price per share | $ 41.71 |  |
Conversion of shares |  |  | 514,000
Conversion price |  |  | $ 24.0
Incremental shares |  | 608,000 | 514,000
OGE Energy [Member] |  |  |
Conversion of shares |  |  | 4,613,372
Conversion price |  |  | $ 191.8
IPO [Member] | OGE Energy [Member] |  |  |
Number of shares issued | 9,226,744 |  |

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