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Net Earnings Per Share | 6 Months Ended
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Aug. 31, 2017
Earnings Per Share [Abstract] |
Net Earnings Per Share | Net Earnings Per Share Basic net earnings per share is computed by dividing net earnings available for basic common shares by the weighted average number of shares of common stock outstanding. Diluted net earnings per share is computed by dividing net earnings available for diluted common shares by the sum of weighted average number of shares of common stock outstanding and dilutive potential common stock. Diluted net earnings per share is calculated using the “if-converted” treasury stock method. Basic and Dilutive Net Earnings Per Share Reconciliations
| Three Months Ended | Six Months Ended
| August 31 | August 31
(In thousands except per share data) | 2017 |  | 2016 | 2017 |  | 2016
Net earnings | $ | 181,424 |  |  | $ | 162,362 |  | $ | 393,126 |  |  | $ | 337,722 |
Weighted average common shares outstanding | 182,868 |  |  | 191,539 |  | 184,034 |  |  | 192,534 |
Dilutive potential common shares: |  |  |  |  |  |
Stock options | 1,465 |  |  | 1,599 |  | 1,337 |  |  | 1,423 |
Stock-settled stock units and awards | 363 |  |  | 485 |  | 407 |  |  | 480 |
Weighted average common shares and dilutive potential common shares | 184,696 |  |  | 193,623 |  | 185,778 |  |  | 194,437 |
Basic net earnings per share | $ | 0.99 |  |  | $ | 0.85 |  | $ | 2.14 |  |  | $ | 1.75 |
Diluted net earnings per share | $ | 0.98 |  |  | $ | 0.84 |  | $ | 2.12 |  |  | $ | 1.74 |
Certain options to purchase shares of common stock were outstanding and not included in the calculation of diluted net earnings per share because their inclusion would have been antidilutive. On a weighted average basis, for the three months ended August 31, 2017 and 2016, options to purchase 3,130,285 shares and 2,964,494 shares of common stock, respectively, were not included. For the six months ended August 31, 2017 and 2016, weighted average options to purchase 2,854,557 shares and 2,802,204 shares, respectively, were not included.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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