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Earnings per Share (Tables) | 12 Months Ended
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May 31, 2012
Earnings Per Share [Abstract] |
Computation of basic and diluted earnings per share |
(In thousands except per share data) | 2012 |  | 2011 |  | 2010
Basic Earnings per Share |  |  |  |  |
Net income | $ | 297,637 |  |  | $ | 246,989 |  |  | $ | 215,620 |
Less dividends to: |  |  |  |  |
Common shares | $ | 70,055 |  |  | $ | 71,197 |  |  | $ | 73,377 |
Unvested shares | 765 |  |  | 615 |  |  | 583 |
Total dividends | $ | 70,820 |  |  | $ | 71,812 |  |  | $ | 73,960 |
Undistributed net income | $ | 226,817 |  |  | $ | 175,177 |  |  | $ | 141,660 |
Less: net income allocated to participating unvested securities | 1,880 |  |  | 1,097 |  |  | 661 |
Net income available to common shareholders | $ | 224,937 |  |  | $ | 174,080 |  |  | $ | 140,999 |
Basic weighted average common shares outstanding | 129,891 |  |  | 146,586 |  |  | 152,858 |
Basic earnings per share: |  |  |  |  |
Common shares — distributed earnings | $ | 0.54 |  |  | $ | 0.49 |  |  | $ | 0.48 |
Common shares — undistributed earnings | 1.73 |  |  | 1.19 |  |  | 0.92 |
Total common shares | $ | 2.27 |  |  | $ | 1.68 |  |  | $ | 1.40 |
Unvested shares — distributed earnings | $ | 0.54 |  |  | $ | 0.49 |  |  | $ | 0.48 |
Unvested shares — undistributed earnings | 1.73 |  |  | 1.19 |  |  | 0.92 |
Total unvested shares | $ | 2.27 |  |  | $ | 1.68 |  |  | $ | 1.40 |
(In thousands except per share data) | 2012 |  | 2011 |  | 2010
Diluted Earnings per Share |  |  |  |  |
Net income | $ | 297,637 |  |  | $ | 246,989 |  |  | $ | 215,620 |
Less dividends to: |  |  |  |  |
Common shares | $ | 70,055 |  |  | $ | 71,197 |  |  | $ | 73,377 |
Unvested shares | 765 |  |  | 615 |  |  | 583 |
Total dividends | $ | 70,820 |  |  | $ | 71,812 |  |  | $ | 73,960 |
Undistributed net income | $ | 226,817 |  |  | $ | 175,177 |  |  | $ | 141,660 |
Less: net income allocated to participating unvested securities | 1,880 |  |  | 1,097 |  |  | 661 |
Net income available to common shareholders | $ | 224,937 |  |  | $ | 174,080 |  |  | $ | 140,999 |
Basic weighted average common shares outstanding | 129,891 |  |  | 146,586 |  |  | 152,858 |
Effect of dilutive securities — employee stock options | 142 |  |  | — |  |  | — |
Diluted weighted average common shares outstanding | 130,033 |  |  | 146,586 |  |  | 152,858 |
Diluted earnings per share: |  |  |  |  |
Common shares — distributed earnings | $ | 0.54 |  |  | $ | 0.49 |  |  | $ | 0.48 |
Common shares — undistributed earnings | 1.73 |  |  | 1.19 |  |  | 0.92 |
Total common shares | $ | 2.27 |  |  | $ | 1.68 |  |  | $ | 1.40 |
Unvested shares — distributed earnings | $ | 0.54 |  |  | $ | 0.49 |  |  | $ | 0.48 |
Unvested shares — undistributed earnings | 1.73 |  |  | 1.19 |  |  | 0.92 |
Total unvested shares | $ | 2.27 |  |  | $ | 1.68 |  |  | $ | 1.40 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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