Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Accelerated depreciation and other property related differences	$ 1,714.5	$ 1,677.3
Investment in Energy Transfer's equity securities	0.0	363.5
Regulatory assets	54.8	52.1
Pension Plan	18.0	10.7
Other	(5.1)	7.4
Derivative instruments	2.4	2.2
Bond redemption-unamortized costs	1.6	1.8
Income taxes recoverable from customers, net	(216.7)	(225.8)
State tax credits	(221.2)	(221.2)
Federal tax credits	0.0	(208.4)
Regulatory liabilities	(60.8)	(72.0)
Asset retirement obligations	(18.8)	(19.4)
Postretirement medical and life insurance benefits	(19.2)	(19.2)
Accrued liabilities	(11.2)	(9.5)
Deferred federal investment tax credits	(2.9)	(3.1)
Net operating losses	0.0	(1.0)
Accrued vacation	(1.4)	(1.5)
Uncollectible accounts	(0.5)	(0.6)
Deferred Income Tax Liabilities, Net, Total	1,233.5	1,333.3
Og and E [Member]
Income Taxes [Line Items]
Accelerated depreciation and other property related differences	1,714.5	1,677.3
Investment in Energy Transfer's equity securities	0.0	0.0
Regulatory assets	54.7	52.1
Pension Plan	35.4	32.0
Other	(5.8)	(4.7)
Derivative instruments	0.0	0.0
Bond redemption-unamortized costs	1.6	1.8
Income taxes recoverable from customers, net	(216.7)	(225.8)
State tax credits	(208.5)	(205.9)
Federal tax credits	0.0	(209.8)
Regulatory liabilities	(60.8)	(72.0)
Asset retirement obligations	(18.8)	(19.4)
Postretirement medical and life insurance benefits	(12.7)	(13.0)
Accrued liabilities	(7.3)	(7.3)
Deferred federal investment tax credits	(2.9)	(3.1)
Net operating losses	0.0	0.0
Accrued vacation	(1.1)	(1.2)
Uncollectible accounts	(0.5)	(0.6)
Deferred Income Tax Liabilities, Net, Total	$ 1,271.1	$ 1,000.4

Deferred Tax Liabilities, Income Taxes Refundable to Customers, Net

No definition available.

Name:	oge_DeferredTaxLiabilitiesIncomeTaxesRefundableToCustomersNet
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Deferred Tax Liabilities, Unamortized Bond Redemption Costs

+ References

No definition available.

+ Details

Name:	oge_DeferredTaxLiabilitiesUnamortizedBondRedemptionCosts
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Income taxes.

+ References

No definition available.

+ Details

Name:	oge_IncomeTaxesLineItems
Namespace Prefix:	oge_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Non-Current Deferred Tax Asset, Net Operating Losses

+ References

No definition available.

+ Details

Name:	oge_NonCurrentDeferredTaxAssetNetOperatingLosses
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Non-Current Deferred Tax Assets, Deferred Federal Investment Tax Credits

+ References

No definition available.

+ Details

Name:	oge_NonCurrentDeferredTaxAssetsDeferredFederalInvestmentTaxCredits
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Non-Current Deferred Tax Assets, Regulatory Liabilities

+ References

No definition available.

+ Details

Name:	oge_NonCurrentDeferredTaxAssetsRegulatoryLiabilities
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Non-Current Deferred Tax Assets, State Tax Credits

+ References

No definition available.

+ Details

Name:	oge_NonCurrentDeferredTaxAssetsStateTaxCredits
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=123427490&loc=d3e31931-109318

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=123427490&loc=d3e31917-109318

+ Details

Name:	us-gaap_DeferredIncomeTaxLiabilitiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319

+ Details

Name:	us-gaap_DeferredTaxAssetsOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

+ Details

Name:	us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits.

+ References

+ Details

Name:	us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

+ References

+ Details

Name:	us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from allowance for credit loss on accounts receivable.

+ References

+ Details

Name:	us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset retirement obligations. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset.

+ References

+ Details

Name:	us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves and accruals, classified as other.

+ References

+ Details

Name:	us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of deferred tax liability attributable to taxable temporary differences from derivatives.

+ References

+ Details

Name:	us-gaap_DeferredTaxLiabilitiesDerivatives
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments).

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredTaxLiabilitiesInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredTaxLiabilitiesPrepaidExpenses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

+ References

+ Details

Name:	us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets.

+ References

+ Details

Name:	us-gaap_DeferredTaxLiabilitiesRegulatoryAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=oge_OgAndEMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: