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v3.26.1

Report of Business Segments (Tables) | 6 Months Ended
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Jun. 30, 2026
Segment Reporting [Abstract] |
Summary of OGE Energy's Business Segments | The following tables, which include significant segment expenses, present the results of OGE Energy's business segments for the three and six months ended June 30, 2026 and 2025.
Three Months Ended June 30, 2026 |  | Electric Company |  |  | Other Operations |  |  | Eliminations |  |  | Total |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 711.9 |  |  | $ | — |  |  | $ | — |  |  | $ | 711.9 |
Fuel, purchased power and direct transmission expense |  |  | 217.7 |  |  |  | — |  |  |  | — |  |  |  | 217.7 |
Other operation and maintenance |  |  | 138.6 |  |  |  | 0.1 |  |  |  | — |  |  |  | 138.7 |
Depreciation and amortization |  |  | 138.1 |  |  |  | — |  |  |  | — |  |  |  | 138.1 |
Taxes other than income |  |  | 25.8 |  |  |  | — |  |  |  | — |  |  |  | 25.8 |
Operating income (loss) |  |  | 191.7 |  |  |  | (0.1 | ) |  |  | — |  |  |  | 191.6 |
Net other income |  |  | 10.6 |  |  |  | 5.8 |  |  |  | (3.5 | ) |  |  | 12.9 |
Interest expense |  |  | 58.4 |  |  |  | 11.8 |  |  |  | (3.5 | ) |  |  | 66.7 |
Income tax expense (benefit) |  |  | 23.8 |  |  |  | (2.3 | ) |  |  | — |  |  |  | 21.5 |
Net income (loss) |  | $ | 120.1 |  |  | $ | (3.8 | ) |  | $ | — |  |  | $ | 116.3 |
Total assets |  | $ | 15,026.3 |  |  | $ | 125.3 |  |  | $ | (525.0 | ) |  | $ | 14,626.6 |
Capital expenditures |  | $ | 221.8 |  |  | $ | — |  |  | $ | — |  |  | $ | 221.8 |
Three Months Ended June 30, 2025 |  | Electric Company |  |  | Other Operations |  |  | Eliminations |  |  | Total |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 741.6 |  |  | $ | — |  |  | $ | — |  |  | $ | 741.6 |
Fuel, purchased power and direct transmission expense |  |  | 261.1 |  |  |  | — |  |  |  | — |  |  |  | 261.1 |
Other operation and maintenance |  |  | 126.3 |  |  |  | 0.8 |  |  |  | — |  |  |  | 127.1 |
Depreciation and amortization |  |  | 140.6 |  |  |  | — |  |  |  | — |  |  |  | 140.6 |
Taxes other than income |  |  | 26.2 |  |  |  | — |  |  |  | — |  |  |  | 26.2 |
Operating income (loss) |  |  | 187.4 |  |  |  | (0.8 | ) |  |  | — |  |  |  | 186.6 |
Net other income |  |  | 7.0 |  |  |  | 9.0 |  |  |  | (0.9 | ) |  |  | 15.1 |
Interest expense |  |  | 63.4 |  |  |  | 9.7 |  |  |  | (0.9 | ) |  |  | 72.2 |
Income tax expense (benefit) |  |  | 23.3 |  |  |  | (1.3 | ) |  |  | — |  |  |  | 22.0 |
Net income (loss) |  | $ | 107.7 |  |  | $ | (0.2 | ) |  | $ | — |  |  | $ | 107.5 |
Total assets |  | $ | 13,990.8 |  |  | $ | 140.4 |  |  | $ | (42.1 | ) |  | $ | 14,089.1 |
Capital expenditures |  | $ | 273.7 |  |  | $ | — |  |  | $ | — |  |  | $ | 273.7 |
Six Months Ended June 30, 2026 |  | Electric Company |  |  | Other Operations |  |  | Eliminations |  |  | Total |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 1,464.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,464.5 |
Fuel, purchased power and direct transmission expense |  |  | 554.4 |  |  |  | — |  |  |  | — |  |  |  | 554.4 |
Other operation and maintenance |  |  | 275.4 |  |  |  | (0.2 | ) |  |  | — |  |  |  | 275.2 |
Depreciation and amortization |  |  | 274.5 |  |  |  | — |  |  |  | — |  |  |  | 274.5 |
Taxes other than income |  |  | 55.7 |  |  |  | — |  |  |  | — |  |  |  | 55.7 |
Operating income |  |  | 304.5 |  |  |  | 0.2 |  |  |  | — |  |  |  | 304.7 |
Net other income |  |  | 17.5 |  |  |  | 5.5 |  |  |  | (3.9 | ) |  |  | 19.1 |
Interest expense |  |  | 108.4 |  |  |  | 22.1 |  |  |  | (3.9 | ) |  |  | 126.6 |
Income tax expense (benefit) |  |  | 35.6 |  |  |  | (4.9 | ) |  |  | — |  |  |  | 30.7 |
Net income (loss) |  | $ | 178.0 |  |  | $ | (11.5 | ) |  | $ | — |  |  | $ | 166.5 |
Total assets |  | $ | 15,026.3 |  |  | $ | 125.3 |  |  | $ | (525.0 | ) |  | $ | 14,626.6 |
Capital expenditures |  | $ | 488.6 |  |  | $ | — |  |  | $ | — |  |  | $ | 488.6 |
Six Months Ended June 30, 2025 |  | Electric Company |  |  | Other Operations |  |  | Eliminations |  |  | Total |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 1,489.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,489.3 |
Fuel, purchased power and direct transmission expense |  |  | 585.1 |  |  |  | — |  |  |  | — |  |  |  | 585.1 |
Other operation and maintenance |  |  | 248.1 |  |  |  | 0.8 |  |  |  | — |  |  |  | 248.9 |
Depreciation and amortization |  |  | 278.0 |  |  |  | — |  |  |  | — |  |  |  | 278.0 |
Taxes other than income |  |  | 57.4 |  |  |  | — |  |  |  | — |  |  |  | 57.4 |
Operating income (loss) |  |  | 320.7 |  |  |  | (0.8 | ) |  |  | — |  |  |  | 319.9 |
Net other income |  |  | 15.9 |  |  |  | 10.2 |  |  |  | (4.1 | ) |  |  | 22.0 |
Interest expense |  |  | 120.2 |  |  |  | 23.4 |  |  |  | (4.1 | ) |  |  | 139.5 |
Income tax expense (benefit) |  |  | 37.7 |  |  |  | (5.5 | ) |  |  | — |  |  |  | 32.2 |
Net income (loss) |  | $ | 178.7 |  |  | $ | (8.5 | ) |  | $ | — |  |  | $ | 170.2 |
Total assets |  | $ | 13,990.8 |  |  | $ | 140.4 |  |  | $ | (42.1 | ) |  | $ | 14,089.1 |
Capital expenditures |  | $ | 523.2 |  |  | $ | — |  |  | $ | — |  |  | $ | 523.2 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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