DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
May 31, 2012	May 31, 2011	May 31, 2010
Cash Flow Hedges (Narrative) [Abstract]
Cash flow hedges outstanding	$ 0	$ 0
Fair Value Hedges (Narrative) [Abstract]
Fair value of interest rate swap agreements recorded as other assets	69	69
Foreign Currency Forward Contracts Not Designated as Hedges (Narrative) [Abstract]
Notional amount of foreign currency forward contracts to purchase US Dollars	3,000	2,500
Notional amount of foreign currency forward contracts to sell US Dollars	873	1,600
Net gains (losses) related to forward contracts included in our non-operating income (expense), net	43	(39)	(35)
Net Investment Hedges (Narrative) [Abstract]
Net investment hedges outstanding	0	0
Amount of loss recognized in Accumulated OCI on derivative (effective portion)			(37)
Amount of gain recognized to non-operating expense, net on derivative (ineffective portion and amount excluded from effectiveness testing)			$ 1

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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-Name Statement of Financial Accounting Standard (FAS)

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The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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The fair value as of the balance sheet date of firm holdings in all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments. Their value is derived from the values of one or more underlying assets, reference rates, or indices of asset values. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

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Aggregate notional amount of all derivatives designated as a hedge of a net investment in a foreign operation. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

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Aggregate notional amount of foreign currency derivatives to purchase a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Aggregate notional amount of foreign currency derivatives to sell a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Aggregate notional amount of all interest rate derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract.

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