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Commitments and Contingencies (Details) - Jun. 30, 2015 - USD ($) | Total
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New Source Review [Member] |
Long-term Purchase Commitment [Line Items] |
Potential Penalty Under the Federal Clean Air Act | $ 37,500
Clean Power Plan [Member] |
Long-term Purchase Commitment [Line Items] |
Proposed Rate-Based Carbon Reduction | 43.00%
Final Rate-Based Carbon Reduction | 32.00%
Mass-Based Carbon Reduction | 24.00%

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- Definition Final Rate-Based Carbon Reduction + References No definition available. + Details
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Namespace Prefix: | oge_
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- Definition Mass-Based Carbon Reduction + References No definition available. + Details
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Namespace Prefix: | oge_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Potential Penalty Under the Federal Clean Air Act + References No definition available. + Details
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- Definition Proposed Rate-Based Carbon Reduction + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- 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 No definition available. + Details
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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |