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Fair Value Measurements - Additional Information (Detail) (USD $)
In Millions, 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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| Fair Value, Measurement Inputs, Disclosure [Line Items] | |||
| Available-for-sale securities with maturity dates within one year from purchase date | $ 1,129 | $ 2,253 | |
| Available-for-sale securities with maturity dates over one year and less than five years from purchase date | 311 | 330 | |
| Interest income related to cash and equivalents and short-term investments | $ 30 | $ 30 | $ 30 |
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- Details
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- Definition
This item represents the fair value of debt securities which are expected to mature after one year and through five years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the fair value of debt securities which are expected to mature within one year of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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