v3.26.1
SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) (Details) - EBP 003 - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Plan Name EMPLOYEES' STOCK OWNERSHIP AND RETIREMENT SAVINGS PLAN  
Entity Tax Identification Number 73-1481638  
EBP, Plan Number 003  
Current Value $ 13,072,943  
Cost 0  
Current Value $ 930,437,461  
Minimum    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Participant Loan, Interest Rate 8.00% 8.75%
Maximum    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Participant Loan, Interest Rate 8.50% 9.50%
Investment, Identifier [Axis]: American Funds 2010 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 1,803,997  
Investment, Identifier [Axis]: American Funds 2015 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 1,841,698  
Investment, Identifier [Axis]: American Funds 2020 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 6,824,335  
Investment, Identifier [Axis]: American Funds 2025 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 11,867,908  
Investment, Identifier [Axis]: American Funds 2030 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 30,067,794  
Investment, Identifier [Axis]: American Funds 2035 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 31,961,720  
Investment, Identifier [Axis]: American Funds 2040 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 37,788,677  
Investment, Identifier [Axis]: American Funds 2045 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 34,760,691  
Investment, Identifier [Axis]: American Funds 2050 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 34,074,073  
Investment, Identifier [Axis]: American Funds 2055 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 26,357,129  
Investment, Identifier [Axis]: American Funds 2060 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 14,796,899  
Investment, Identifier [Axis]: American Funds 2065 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 6,216,818  
Investment, Identifier [Axis]: American Funds 2070 Target Date Retirement Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 246,568  
Investment, Identifier [Axis]: American Funds American Mutual Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 15,254,875  
Investment, Identifier [Axis]: American Funds EuroPacific Growth Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 17,308,439  
Investment, Identifier [Axis]: Conestoga Conestoga Small Cap Stock Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Conestoga [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 4,957,117  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. 500 Index Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 73,994,931  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Blue Chip Growth Fund (Class K6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 109,602,344  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. BrokerageLink®, self-directed brokerage account    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Self-Directed Brokerage Account [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 59,786,588  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Contrafund (Class K6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 103,655,237  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Freedom K® Income Fund (Class K6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 3,840  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Freedom K® Retirement Fund (Class K6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 3,551  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Global ex U.S. Index Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 31,210,291  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Low-Priced Stock Fund (Class K), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 10,719,550  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Managed Income Portfolio II, collective trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 21,948,629  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Mid Cap Index Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 14,568,176  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Retirement Money Market, interest-bearing cash    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Interest-Bearing Deposits [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 172,172  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. Small Cap Index Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 770,852  
Investment, Identifier [Axis]: Fidelity Mgmt. Trust Co. U.S. Bond Index Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Mgmt. Trust Co. [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 13,935,831  
Investment, Identifier [Axis]: Glenmede Small Cap Equity Portfolio (Institutional Class), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Glenmede [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 9,161,557  
Investment, Identifier [Axis]: Loomis Sayles Core Plus Bond Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Loomis Sayles [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 18,770,099  
Investment, Identifier [Axis]: OGE Energy Corp. Common stock, $0.01 par value    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] OGE Energy Corp [Member]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockMember  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 134,020,028  
Investment, Identifier [Axis]: Participants    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
Investment, Identifier [Axis]: Participants | Minimum    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Participant Loan, Interest Rate 4.25%  
Investment, Identifier [Axis]: Participants | Maximum    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Participant Loan, Interest Rate 9.50%  
Investment, Identifier [Axis]: T. Rowe Price Mid Cap Growth Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 11,513,855  
Investment, Identifier [Axis]: Touchstone Large Cap Fund, mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Touchstone [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 19,056,586  
Investment, Identifier [Axis]: Victory Sycamore Established Value Fund (Class R6), mutual fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] Victory [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Current Value $ 8,341,663