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Earnings Per Share | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The following is a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per share available to common stockholders.
|  | For the Years Ended December 31,
|  | 2013 |  | 2014 |  | 2015
Numerator |  |  |  |  |  |
Net income (controlling interest) |  | $ | 360.5 |  |  | $ | 452.1 |  |  | $ | 516.0 |
Interest expense on convertible securities, net of taxes |  | 10.5 |  |  | 15.2 |  |  | 15.3 |
Net income (controlling interest), as adjusted |  | $ | 371.0 |  |  | $ | 467.3 |  |  | $ | 531.3 |
Denominator |  |  |  |  |  |  |  |  |
Average shares outstanding (basic) |  | 53.1 |  |  | 55.0 |  |  | 54.3 |
Effect of dilutive instruments: |  |  |  |  |  |  |  |  |
Stock options and other awards |  | 1.3 |  |  | 1.2 |  |  | 0.7 |
Forward sale |  | 0.3 |  |  | 0.0 |  |  | — |
Junior convertible securities |  | 2.0 |  |  | 2.2 |  |  | 2.2 |
Average shares outstanding (diluted) |  | 56.7 |  |  | 58.4 |  |  | 57.2 |
During the years ended December 31, 2013, 2014 and 2015, the Company repurchased 0.1 million, 1.2 million and 1.7 million shares of common stock, respectively, at an average share price of $184.89, $204.72 and $209.39, respectively, under the share repurchase programs approved by the Company’s Board of Directors. The diluted earnings per share calculations in the table above excluded the anti-dilutive effect of the following shares:
| For the Years Ended December 31,
| 2013 |  | 2014 |  | 2015
Stock options and other awards | 0.1 |  |  | 0.0 |  |  | 0.0 |
Senior convertible securities | 2.1 |  |  | — |  |  | — |
Junior convertible securities | 2.2 |  |  | 0.4 |  |  | — |
As discussed further in Note 20, the Company may settle portions of its Affiliate equity purchases in shares of its common stock. Because it is the Company’s intent to settle these potential repurchases in cash, the calculation of diluted earnings per share excluded any potential dilutive effect from possible share settlements.

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