Net Earnings Per Share Net earnings per share were computed as follows: | | | | | | | | | | | | | | Year ended December 31, | | 2015 | | 2014 | | 2013 | | (in millions, except per share amounts) | Net earnings attributable to common stockholders | $ | 699.9 |
| | $ | 1,390.3 |
| | $ | 1,464.6 |
| Basic earnings per common share(1): | |
| | |
| | |
| Weighted-average common shares outstanding | 235.3 |
| | 255.9 |
| | 294.4 |
| Net earnings attributable to common stockholders | $ | 2.97 |
| | $ | 5.43 |
| | $ | 4.97 |
| Diluted earnings per common share(1): | |
| | |
| | |
| Weighted-average common shares outstanding | 235.3 |
| | 255.9 |
| | 294.4 |
| Dilutive common shares—stock options | 0.8 |
| | 0.8 |
| | 1.6 |
| Diluted weighted-average shares outstanding | 236.1 |
| | 256.7 |
| | 296.0 |
| Net earnings attributable to common stockholders | $ | 2.96 |
| | $ | 5.42 |
| | $ | 4.95 |
|
| | (1) | Share and per share amounts have been retroactively restated for all prior periods presented to reflect the five-for-one split of the Company’s common stock effected in the form of a stock dividend that was distributed on June 17, 2015. |
In the computation of diluted earnings per common share, potentially dilutive stock options are excluded if the effect of their inclusion is anti-dilutive. For the years ended December 31, 2015, 2014 and 2013, anti-dilutive stock options were insignificant. |