NOTE 5 — EARNINGS PER SHARE
We compute basic earnings per share using the weighted average number of common shares outstanding. We compute diluted earnings per share using the weighted average number of common shares outstanding plus the dilutive effect of outstanding stock options, SARs and RSUs, computed using the treasury stock method. During September 2011, we repurchased 80,771,143 shares of our common stock. During November 2013, we repurchased 10,656,436 shares of our common stock. The following table sets forth the computations of basic and diluted earnings per share for the years ended December 31, 2013, 2012 and 2011 (dollars in millions, except per share amounts, and shares in thousands):
| 2013 | 2012 | 2011 | ||||||||||
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Net income attributable to HCA Holdings, Inc |
$ | 1,556 | $ | 1,605 | $ | 2,465 | ||||||
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Weighted average common shares outstanding |
445,066 | 440,178 | 476,609 | |||||||||
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Effect of dilutive incremental shares |
16,847 | 19,225 | 19,334 | |||||||||
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Shares used for diluted earnings per share |
461,913 | 459,403 | 495,943 | |||||||||
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Earnings per share: |
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Basic earnings per share |
$ | 3.50 | $ | 3.65 | $ | 5.17 | ||||||
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Diluted earnings per share |
$ | 3.37 | $ | 3.49 | $ | 4.97 | ||||||