v2.4.0.6

FAIR VALUE MEASUREMENTS (Details) (USD $) In Millions, unless otherwise specified	Nov. 30, 2012	May 31, 2012
Assets [Abstract]
U.S. Treasury, U.S. government and U.S. government agency debt securities	$ 350	$ 100
Commercial paper debt securities	16,620	13,954
Corporate debt securities and other	4,605	2,237
Derivative financial instruments	57	69
Total assets	21,632	16,360
Liabilities [Abstract]
Contingent consideration	258	387
Total debt	19,800	16,500
Fair Value Measurements Using Input Types Level 1 [Member]
Assets [Abstract]
U.S. Treasury, U.S. government and U.S. government agency debt securities	350	100
Corporate debt securities and other	300	254
Total assets	650	354
Fair Value Measurements Using Input Types Level 2 [Member]
Assets [Abstract]
Commercial paper debt securities	16,620	13,954
Corporate debt securities and other	4,305	1,983
Derivative financial instruments	57	69
Total assets	20,982	16,006
Liabilities [Abstract]
Total debt fair value	22,800	19,300
Fair Value Measurements Using Input Types Level 3 [Member]
Liabilities [Abstract]
Contingent consideration	$ 258	$ 387

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Unsecured short-term debt instrument issued by corporations which are highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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The fair value as of the balance sheet date of firm holdings in fixed income or other debt securities issued by a corporation or other issuer not elsewhere specified in the taxonomy. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

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The fair value as of the balance sheet date of firm holdings in debt obligations issued by the US government including short-term Treasury bills, medium-term Treasury notes, and long-term Treasury bonds, as well as debt issued by agencies. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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