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Summary of Significant Accounting Policies Property - Summary of OG&E's Ownership Interest in Jointly-owned Plant (Parenthetical) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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McClain Plant [Member] |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress | $ 0.3 | $ 0.7
Redbud Plant [Member] |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress | 2.0 | 1.5
Amount of Acquisition Adjustments | 148.3 | 148.3
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation | $ 83.8 | $ 78.3

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- Definition The period end amount of construction work in progress at a jointly owned electricity generation plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479960/980-360-S99-1 + Details
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- Definition Amount of acquisition adjustments included in property, plant and equipment (PPE) for utilities. + References No definition available. + Details
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- Definition Amount of increase (decrease) for acquisition adjustments on accumulated depreciation included in long-lived, physical assets used to produce goods and services and not intended for resale for utilities. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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