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Summary of Significant Accounting Policies - Additional Information (Details) - OKLAHOMA [Member] | 1 Months Ended
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May 31, 2025
Regulatory asset percent of deferred cost | 90.00%
Amortization period of regulatory asset | 20 years

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- Definition Regulatory assets percentage of deferred costs. + References No definition available. + Details
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Namespace Prefix: | oge_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_RegulatoryAssetAmortizationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | oge_RegulatoryJurisdictionAxis=stpr_OK
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |