Plan Description - Additional Information (Details) - EBP 003 - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
EBP, Description of Plan [Line Items]
EBP, Description, Available [true false]	true
Employee benefit plan, participant contribution, pretax, minimum annual compensation to total compensation, percentage	2.00%
Employee benefit plan, participant contribution, pretax, maximum annual compensation to total compensation, percentage	75.00%
EBP, Percentage of employer contributions	200.00%
EBP, Employer Contribution, Noncash	$ 0
Employee benefit plan, vesting percentage	20.00%
Forfeited non-vested participant balances	$ 605,960
EBP, Forfeited nonvested unallocated to participant	15,891	$ 497,032
Note receivable, maximum borrowing amount	$ 50,000
Note receivable, maximum borrowing percentage of account balance	50.00%
General purpose loan, maximum repayment term	5 years
Spread on prime rate	1.00%
Participants obtaining a loan charged	$ 35
Administrative expenses for maintenance	15
Continuing liability from disposition of assets	$ 0
EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage	75.00%
Maximum
EBP, Description of Plan [Line Items]
EBP, Employer Contribution, Participant Compensation Matched, Percentage	5.00%
EBP, participant's vested account	$ 1,000
EBP, interest rate ranged	8.50%	9.50%
Minimum
EBP, Description of Plan [Line Items]
EBP, participant's vested account	$ 1,000
EBP, interest rate ranged	8.00%	8.75%
Less Than 20 Years of Service
EBP, Description of Plan [Line Items]
EBP, Percentage of employer contributions	50.00%
Less Than 20 Years of Service \| Maximum
EBP, Description of Plan [Line Items]
EBP, Employer Contribution, Participant Compensation Matched, Percentage	6.00%
20 or More Years of Service
EBP, Description of Plan [Line Items]
EBP, Percentage of employer contributions	75.00%
20 or More Years of Service \| Maximum
EBP, Description of Plan [Line Items]
EBP, Employer Contribution, Participant Compensation Matched, Percentage	6.00%
Freeze Options
EBP, Description of Plan [Line Items]
EBP, Percentage of employer contributions	100.00%
Freeze Options \| Maximum
EBP, Description of Plan [Line Items]
EBP, Employer Contribution, Participant Compensation Matched, Percentage	6.00%

Employee Benefit Plan Continuing Liability from Disposition of Assets.

No definition available.

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

- Definition

Employee Benefit Plan Forfeited Vested Account.

+ References

No definition available.

+ Details

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

- Definition

Employee Benefit Plan from Administrative Expense for Maintenance.

+ References

No definition available.

+ Details

Name:	oge_EmployeeBenefitPlanFromAdministrativeExpenseForMaintenance
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Employee benefit plan participant contribution pretax minimum annual compensation to total compensation percentage.

+ References

No definition available.

+ Details

Name:	oge_EmployeeBenefitPlanParticipantContributionPretaxMinimumAnnualCompensationToTotalCompensationPercentage
Namespace Prefix:	oge_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan, Participant Loan, Basis Spread on Variable Rate.

+ References

No definition available.

+ Details

Name:	oge_EmployeeBenefitPlanParticipantLoanBasisSpreadOnVariableRate
Namespace Prefix:	oge_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan, Participant Loan, General Purpose, Maximum Repayment Term.

+ References

No definition available.

+ Details

Name:	oge_EmployeeBenefitPlanParticipantLoanGeneralPurposeMaximumRepaymentTerm
Namespace Prefix:	oge_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan Participants Obtaining Loan Charged.

+ References

No definition available.

+ Details

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

- Definition

Employee benefit plan vesting percentage.

+ References

No definition available.

+ Details

Name:	oge_EmployeeBenefitPlanVestingPercentage
Namespace Prefix:	oge_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of increase in net asset available for benefit from noncash contribution from employer of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477063/962-205-45-7

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Indicates (true false) whether description of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) is published and made available.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from reallocation to participant.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(5)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
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- Details

Name:	oge_EBPContributionTrancheAxis=oge_EBPMatchingTierTwoMember
Namespace Prefix:
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Balance Type:
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- Details

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Namespace Prefix:
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