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v3.25.3

Stock-Based Compensation - Schedule of Pre-tax Compensation Expense and Related Income Tax Benefit (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total compensation expense | $ 3.5 | $ 2.1 | $ 10.1 | $ 8.6
Income tax benefit | 0.8 | 0.5 | 2.4 | 2.1
OG&E [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total compensation expense | 3.5 | 2.1 | 10.1 | 8.6
Income tax benefit | 0.8 | 0.5 | 2.4 | 2.1
Performance Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total compensation expense | 2.4 | 1.4 | 7.0 | 5.8
Performance Units [Member] | OG&E [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total compensation expense | 2.4 | 1.4 | 7.0 | 5.8
Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total compensation expense | 1.1 | 0.7 | 3.1 | 2.8
Restricted Stock Units (RSUs) [Member] | OG&E [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total compensation expense | $ 1.1 | $ 0.7 | $ 3.1 | $ 2.8

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