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Common Equity (Tables) | 6 Months Ended
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Jun. 30, 2026
Equity [Abstract] |
Schedule of Earnings Per Share Basic and Diluted | The following table presents the calculation of basic and diluted earnings per share for OGE Energy.
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
(In millions, except per share data) |  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Net income |  | $ | 116.3 |  |  | $ | 107.5 |  |  | $ | 166.5 |  |  | $ | 170.2 |
Average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Basic average common shares outstanding |  |  | 206.5 |  |  |  | 201.3 |  |  |  | 206.4 |  |  |  | 201.3 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Contingently issuable shares (performance and restricted stock units) |  |  | 0.7 |  |  |  | 0.8 |  |  |  | 0.6 |  |  |  | 0.7 |
Forward equity sale agreements |  |  | 0.6 |  |  |  | — |  |  |  | 0.5 |  |  |  | — |
Diluted average common shares outstanding |  |  | 207.8 |  |  |  | 202.1 |  |  |  | 207.5 |  |  |  | 202.0 |
Basic earnings per average common share |  | $ | 0.56 |  |  | $ | 0.53 |  |  | $ | 0.81 |  |  | $ | 0.85 |
Diluted earnings per average common share |  | $ | 0.56 |  |  | $ | 0.53 |  |  | $ | 0.80 |  |  | $ | 0.84 |
Anti-dilutive shares excluded from earnings per share calculation |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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