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Short-Term Debt and Credit Facilities (Tables) | 9 Months Ended
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Sep. 30, 2013
Short-term Debt [Abstract] |
Schedule of Line of Credit Facilities [Table Text Block] | The following table provides information regarding the Company's revolving credit agreements at September 30, 2013.
| Aggregate |  | Amount | Weighted-Average |  |  |
Entity | Commitment |  | Outstanding (A) | Interest Rate |  | Maturity |
| (In millions) |  |  |  |
OGE Energy (B) | $ | 750.0 |  |  | $ | 447.0 |  | 0.30 | % | (E) | December 13, 2017 | (F)
OG&E (C) | 400.0 |  |  | 2.1 |  | 0.53 | % | (E) | December 13, 2017 | (F)
Total | $ | 1,150.0 |  | (D) | $ | 449.1 |  | 0.30 | % |  |  |
(A) | Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at September 30, 2013.
(B) | This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.
(C) | This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.
(D) | Effective May 1, 2013, Enable Midstream Partners entered into a $1.4 billion, five-year senior unsecured revolving credit facility in accordance with the terms of the Master Formation Agreement and Enogex LLC's $400 million revolving credit facility was terminated.
(E) | Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit.
(F) | In December 2011, the Company and OG&E entered into unsecured five-year revolving credit agreement s to total in the aggregate $1,150.0 million ($750 million for the Company and $400 million for OG&E). Each of the credit facilit ies contain an option, which may be exercised up to two times, to extend the term for an additional year, subject to consent of a specified percentage of the lenders. Effective July 29, 2013, the Company and OG&E utilized one of these one-year extensions, and received consent from all of the lenders, to extend the maturity of their credit agreement s to December 13, 2017.

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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