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Summary of Significant Accounting Policies Property - Summary of Property Plant and Equipment (Parenthetical) (Details) - OG&E [Member] - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Electric Generation Equipment [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Amount of Acquisition Adjustments	$ 148.3	$ 148.3
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation	89.3	83.8
Electric Transmission [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Amount of Acquisition Adjustments	3.3	3.3
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation	$ 1.2	$ 1.1

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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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- Details

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- Details

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