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Basic and Diluted Earnings Per Share | 12 Months Ended
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May 31, 2013
Earnings Per Share [Abstract] |
Basic and Diluted Earnings Per Share | Basic and Diluted Earnings Per Share Basic and diluted earnings per share were calculated as follows:
|  | Year ended May 31,
In millions, except per share amounts |  | 2013 |  | 2012 |  | 2011
Basic earnings per share: |  |  |  |  |  |
Net income |  | $ | 569.0 |  |  | $ | 548.0 |  |  | $ | 515.3 |
Weighted-average common shares outstanding |  | 363.8 |  |  | 362.4 |  |  | 361.8 |
Basic earnings per share |  | $ | 1.56 |  |  | $ | 1.51 |  |  | $ | 1.42 |
Diluted earnings per share: |  |  |  |  |  |
Net income |  | $ | 569.0 |  |  | $ | 548.0 |  |  | $ | 515.3 |
Weighted-average common shares outstanding |  | 363.8 |  |  | 362.4 |  |  | 361.8 |
Dilutive effect of common share equivalents at average market price |  | 0.9 |  |  | 0.6 |  |  | 0.6 |
Weighted-average common shares outstanding, assuming dilution |  | 364.7 |  |  | 363.0 |  |  | 362.4 |
Diluted earnings per share |  | $ | 1.56 |  |  | $ | 1.51 |  |  | $ | 1.42 |
Weighted-average anti-dilutive common share equivalents |  | 6.5 |  |  | 9.9 |  |  | 11.5 |
Weighted-average common share equivalents that had an anti-dilutive impact are excluded from the computation of diluted earnings per share.

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