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Commitments and Contingencies (Details) (USD $) |  |  | 3 Months Ended | 7 Months Ended | 10 Months Ended | 9 Months Ended |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Mar. 31, 2014 OG&E minimum fuel purchase commitments [Member] | Oct. 31, 2013 OG&E minimum fuel purchase commitments [Member] | Oct. 31, 2013 OG&E minimum fuel purchase commitments [Member] | Sep. 30, 2013 OG&E long-term service agreement commitments [Member] McClain Plant [Member] | Sep. 30, 2013 OG&E long-term service agreement commitments [Member] Redbud Plant [Member] | Sep. 30, 2013 Enogex [Member] | Sep. 30, 2013 OG&E Wind Energy Purchase Power Lawsuit [Member]
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |
Percentage of OG&E's Projected 2013 Requirements |  |  |  | 84.00% | 26.10% |  |  |  |
Percentage of OG&E's Projected 2014 Requirements |  |  | 25.50% |  |  |  |  |  |
Factored-Fired Hours |  |  |  |  |  | 128,000 | 24,000 |  |
Factored-Fired Starts |  |  |  |  |  | 3,600 |  |  |
Operating Leases, Future Minimum Payments Due | $ 0 |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  | 0 |
Loss Contingency, Damages Sought, Value |  |  |  |  |  |  |  |  | 100,000
Loss Contingency, Range of Possible Loss, Minimum |  |  |  |  |  |  |  |  | 0
Loss Contingency, Range of Possible Loss, Maximum |  |  |  |  |  |  |  |  | 10,000,000
Estimated Environmental Capital Costs | 1,000,000,000 |  |  |  |  |  |  |  |
Potential Penalty Under the Federal Clean Air Act | $ 37,500 |  |  |  |  |  |  |  |

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- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 25 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 17 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.17) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),19) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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