XML 28 R56.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Rate Matters and Regulation Rate Matters and Regulation (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Jun. 30, 2015
SmartHours Program [Member] |  |  |
Lost Revenue Associated with Customer Programs | $ 11.6 | $ 10.1 |
SmartHours Program [Member] | Oklahoma Public Utility Division Staff [Member] |  |  |
Lost Revenue Associated with Customer Programs |  | 4.9 |
Reduction of Revenue |  | $ 5.2 |
Regional Haze [Member] |  |  |
Estimated Environmental Capital Costs |  |  | $ 1,100.0

X
- Definition Estimated Environmental Capital Costs + References No definition available. + Details
Name: | oge_EstimatedEnvironmentalCapitalCosts
Namespace Prefix: | oge_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lost Revenue Associated with Customer Programs + References No definition available. + Details
Name: | oge_LostRevenueAssociatedwithCustomerPrograms
Namespace Prefix: | oge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reduction of Revenue + References No definition available. + Details
Name: | oge_ReductionofRevenue
Namespace Prefix: | oge_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=oge_SmartHoursProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oge_CommissionRecommendationAxis=oge_OklahomaPublicUtilityDivisionStaffMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oge_EnvironmentalComplianceAxis=oge_RegionalHazeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |