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Common Equity | 9 Months Ended
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Sep. 30, 2013
Common Equity [Text Block] | Common Equity Forward Stock Split On May 16, 2013, the Company's Board of Directors approved a 2-for-1 forward stock split of the Company's common stock, effective July 1, 2013, which entitled each shareholder of record to receive two shares for every one share of Company stock owned by the shareholder. In connection with the stock split, an amendment to the Company's Articles of Incorporation was approved on May 16, 2013 which increased the number of authorized shares of common stock from 225 million to 450 million. A ll share and per share amounts within this Form 10-Q have been retroactively adjusted to reflect the effects of the stock split for all periods presented. Automatic Dividend Reinvestment and Stock Purchase Plan The Company issued 105,595 shares and 304,385 shares, respectively, of common stock under its Automatic Dividend Reinvestment and Stock Purchase Plan during the three and nine months ended September 30, 2013 and received proceeds of $4.0 million and $10.4 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 September 30, 2013, there were 3,940,603 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 | Nine Months Ended
| September 30, | September 30,
(In millions) | 2013 | 2012 | 2013 | 2012
Net Income Attributable to OGE Energy | $ | 215.2 |  | $ | 185.5 |  | $ | 330.0 |  | $ | 316.5 |
Average Common Shares Outstanding |  |  |  |
Basic average common shares outstanding | 198.4 |  | 197.4 |  | 198.1 |  | 197.0 |
Effect of dilutive securities: |  |  |  |
Contingently issuable shares (performance units) | 1.3 |  | 0.9 |  | 1.2 |  | 0.9 |
Diluted average common shares outstanding | 199.7 |  | 198.3 |  | 199.3 |  | 197.9 |
Basic Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders | $ | 1.08 |  | $ | 0.94 |  | $ | 1.67 |  | $ | 1.61 |
Diluted Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders | $ | 1.08 |  | $ | 0.94 |  | $ | 1.66 |  | $ | 1.60 |
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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