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Revenue Recognition (Tables) | 6 Months Ended
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Jun. 30, 2026
Revenues from Contract with Customers [Abstract] |
Disaggregation of Revenue | The following table presents OG&E's revenues from contracts with customers disaggregated by customer classification. OG&E's operating revenues disaggregated by customer classification can be found in "OG&E (Electric Company) Results of Operations" within "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations."
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(In millions) |  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Residential |  | $ | 250.7 |  |  | $ | 251.3 |  |  | $ | 504.2 |  |  | $ | 534.9 |
Commercial |  |  | 207.1 |  |  |  | 218.5 |  |  |  | 413.5 |  |  |  | 425.1 |
Industrial |  |  | 54.7 |  |  |  | 58.4 |  |  |  | 113.8 |  |  |  | 120.0 |
Oilfield |  |  | 48.5 |  |  |  | 52.5 |  |  |  | 106.7 |  |  |  | 111.9 |
Public authorities and street light |  |  | 59.9 |  |  |  | 62.2 |  |  |  | 120.2 |  |  |  | 122.7 |
System sales revenues |  |  | 620.9 |  |  |  | 642.9 |  |  |  | 1,258.4 |  |  |  | 1,314.6 |
Provision for rate refund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3.0 |
Integrated market |  |  | 27.4 |  |  |  | 26.3 |  |  |  | 74.7 |  |  |  | 47.6 |
Transmission |  |  | 30.5 |  |  |  | 42.1 |  |  |  | 71.2 |  |  |  | 81.9 |
Other |  |  | 9.2 |  |  |  | 8.4 |  |  |  | 20.4 |  |  |  | 13.7 |
Revenues from contracts with customers |  | $ | 688.0 |  |  | $ | 719.7 |  |  | $ | 1,424.7 |  |  | $ | 1,460.8 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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