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Stock Option Transactions Under Plan (Detail) (Stock Incentive Plan 1990, USD $)
In Millions, except Per Share data, unless otherwise specified |
12 Months Ended | |||||||
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May 31, 2012
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May 31, 2011
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May 31, 2010
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Stock Incentive Plan 1990
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| Options Outstanding - Shares | ||||||||
| Beginning Balance | 34.8 | [1] | 36.0 | [1] | 38.8 | [1] | ||
| Exercised | (9.0) | [1] | (7.0) | [1] | (8.6) | [1] | ||
| Forfeited | (0.4) | [1] | (0.5) | [1] | (0.6) | [1] | ||
| Granted | 6.8 | [1] | 6.3 | [1] | 6.4 | [1] | ||
| Ending Balance | 32.2 | [1] | 34.8 | [1] | 36.0 | [1] | ||
| Options exercisable | 17.0 | [1] | 20.1 | [1] | 20.4 | [1] | ||
| Options Outstanding - Weighted-Average Option Price | ||||||||
| Beginning Balance (in dollars per share) | $ 51.29 | $ 46.60 | $ 43.69 | |||||
| Exercised (in dollars per share) | $ 45.62 | $ 42.70 | $ 37.64 | |||||
| Forfeited (in dollars per share) | $ 71.04 | $ 58.08 | $ 51.92 | |||||
| Granted (in dollars per share) | $ 91.74 | $ 69.20 | $ 52.79 | |||||
| Ending Balance (in dollars per share) | $ 61.18 | $ 51.29 | $ 46.60 | |||||
| Options exercisable (in dollars per share) | $ 48.75 | $ 44.05 | $ 41.16 | |||||
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- Details
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| X | ||||||||||
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- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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