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Basic and Diluted Earnings Per Share | 12 Months Ended
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May 31, 2017
Basic and Diluted Earnings Per Share [Abstract] |
Basic and Diluted Earnings Per Share | Note B — 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 |  | 2017 |  | 2016 |  | 2015
﻿Basic earnings per share: |  |  |  |  |  |  |  |  |
﻿Net income |  | $ | 817.3 |  | $ | 756.8 |  | $ | 674.9
﻿Weighted-average common shares outstanding |  |  | 359.8 |  |  | 360.7 |  |  | 362.9
﻿Basic earnings per share |  | $ | 2.27 |  | $ | 2.10 |  | $ | 1.86
﻿Diluted earnings per share: |  |  |  |  |  |  |  |  |
﻿Net income |  | $ | 817.3 |  | $ | 756.8 |  | $ | 674.9
﻿Weighted-average common shares outstanding |  |  | 359.8 |  |  | 360.7 |  |  | 362.9
﻿Dilutive effect of common share equivalents |  |  | 2.8 |  |  | 1.8 |  |  | 1.7
﻿Weighted-average common shares outstanding, assuming dilution |  |  | 362.6 |  |  | 362.5 |  |  | 364.6
﻿Diluted earnings per share |  | $ | 2.25 |  | $ | 2.09 |  | $ | 1.85
﻿Weighted-average anti-dilutive common share equivalents |  |  | 0.7 |  |  | 0.5 |  |  | 0.3
﻿ Weighted-average common share equivalents that had an anti-dilutive impact are excluded from the computation of diluted earnings per share. In July 2016, the Company announced that its Board approved a program to repurchase up to $350.0 million of the Company's common stock, with authorization expiring in May 201 9 (the “July 2016 Program”). In May 2014, the Board had previously approved a program to repurchase up to $350.0 million of the Company’s common stock with authorization that expired in May 2017 (the “May 2014 Program”). During fiscal 2017, the Company repurchased 2.9 million shares for $166.2 million. Of the shares repurchased during fiscal 2017, $106.5 million were repurchased under the July 2016 Program and $59.7 million were repurchased under the May 2014 Program. During fiscal 2016, the Company repurchased 2.2 million shares for $107.9 million under the May 2014 Program. The purpose of both programs is to manage common stock dilution. All shares repurchased were retired. As of May 31, 2017, all amounts authorized under the May 2014 Program have been repurchased.

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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 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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