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Common Equity | 6 Months Ended
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Jun. 30, 2014
Common Equity [Text Block] | Common Equity Automatic Dividend Reinvestment and Stock Purchase Plan The Company issued 91,486 shares and 189,962 shares of common stock under its Automatic Dividend Reinvestment and Stock Purchase Plan during the three and six months ended June 30, 2014 and received proceeds of $3.3 million and $6.7 million, respectively. The Company may, from time to time, issue additional shares under its Automatic Dividend Reinvestment and Stock Purchase Plan to fund capital requirements or working capital needs. At June 30, 2014, there were 3,655,541 shares of unissued common stock reserved for issuance under the Company's Automatic Dividend Reinvestment and Stock Purchase Plan. Earnings Per Share Basic earnings per share is calculated by dividing net income attributable to OGE Energy by the weighted average number of the Company's common shares outstanding during the period. In the calculation of diluted earnings per share, weighted average shares outstanding are increased for additional shares that would be outstanding if potentially dilutive securities were converted to common stock. Potentially dilutive securities for the Company consist of performance units. Basic and diluted earnings per share for the Company were calculated as follows:
| Three Months Ended | Six Months Ended
| June 30, | June 30,
(In millions except per share data) | 2014 | 2013 | 2014 | 2013
Net Income Attributable to OGE Energy | $ | 100.8 |  | $ | 91.7 |  | $ | 150.1 |  | $ | 114.8 |
Average Common Shares Outstanding |  |  |  |
Basic average common shares outstanding | 199.2 |  | 198.3 |  | 199.0 |  | 198.0 |
Effect of dilutive securities: |  |  |  |
Contingently issuable shares (performance units) | 0.8 |  | 1.1 |  | 0.8 |  | 1.1 |
Diluted average common shares outstanding | 200.0 |  | 199.4 |  | 199.8 |  | 199.1 |
Basic Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders | $ | 0.51 |  | $ | 0.46 |  | $ | 0.75 |  | $ | 0.58 |
Diluted Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders | $ | 0.50 |  | $ | 0.46 |  | $ | 0.75 |  | $ | 0.58 |
Anti-dilutive shares excluded from earnings per share calculation | — |  | — |  | — |  | — |

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- Definition Disclosures related to earnings per share and current quarter activities in the automatic dividend reinvestment and stock purchase plan. + References No definition available. + Details
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Namespace Prefix: | oge_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration