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Fair Value Measurements - Short-Term Investments Classified as Available-For-Sale (Detail) (USD $)
In Millions, unless otherwise specified |
Feb. 28, 2014
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May 31, 2013
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|---|---|---|
| Available-for-sale investments: | ||
| Available-for-sale investments | $ 3,165 | $ 2,628 |
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U.S. Treasury and Agencies
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| Available-for-sale investments: | ||
| Available-for-sale investments | 2,342 | 2,214 |
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Corporate commercial paper and bonds
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| Available-for-sale investments: | ||
| Available-for-sale investments | $ 823 | $ 414 |