XML 32 R73.htm IDEA: XBRL DOCUMENT v2.4.1.9
Rate Matters and Regulation (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Oklahoma Corporation Commission [Member]  
OG&E's Jurisdictional Revenues 84.00%oge_OgesJurisdictionalRevenues
/ dei_LegalEntityAxis
= oge_OklahomaCorporationCommissionMember
Arkansas Public Service Commission [Member]  
OG&E's Jurisdictional Revenues 8.00%oge_OgesJurisdictionalRevenues
/ dei_LegalEntityAxis
= oge_ArkansasPublicServiceCommissionMember
Federal Energy Regulatory Commission [Member]  
OG&E's Jurisdictional Revenues 8.00%oge_OgesJurisdictionalRevenues
/ dei_LegalEntityAxis
= oge_FederalEnergyRegulatoryCommissionMember
Regional Haze [Member]  
Estimated Environmental Capital Costs 1,100.0oge_EstimatedEnvironmentalCapitalCosts
/ oge_EnvironmentalComplianceAxis
= oge_RegionalHazeMember
Section 206 Complaint [Member]  
Reduction of Revenue 0.9oge_ReductionofRevenue
/ us-gaap_PublicUtilitiesRegulatoryProceedingAxis
= oge_Section206ComplaintMember