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EARNINGS PER SHARE | 12 Months Ended
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May. 31, 2015
Earnings Per Share [Abstract] |
EARNINGS PER SHARE | 17. EARNINGS PER SHARE Basic earnings per share is computed by dividing net income for the period by the weighted average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income for the period by the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding stock options, restricted stock-based awards and shares issuable under the employee stock purchase plan using the treasury stock method. The following table sets forth the computation of basic and diluted earnings per share:
|  | Year Ended May 31,
(in millions, except per share data) |  | 2015 |  | 2014 |  | 2013
Net income |  | $ | 9,938 |  | $ | 10,955 |  | $ | 10,925
Weighted average common shares outstanding |  |  | 4,404 |  |  | 4,528 |  |  | 4,769
Dilutive effect of employee stock plans |  |  | 99 |  |  | 76 |  |  | 75
Dilutive weighted average common shares outstanding |  |  | 4,503 |  |  | 4,604 |  |  | 4,844
Basic earnings per share |  | $ | 2.26 |  | $ | 2.42 |  | $ | 2.29
Diluted earnings per share |  | $ | 2.21 |  | $ | 2.38 |  | $ | 2.26
Shares subject to anti-dilutive stock options and restricted stock-based awards |  |  |  |  |  |  |  |  |
excluded from calculation(1) |  |  | 37 |  |  | 76 |  |  | 208
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(1) | These weighted shares relate to anti-dilutive stock options and restricted stock-based awards as calculated using the treasury stock method and could be dilutive in the future. See Note 14 for information regarding the exercise prices of our outstanding, unexercised options.

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