DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014 Foreign Currency Forward Contracts Not Designated as Hedges [Member] Forward contracts held to purchase U.S. Dollars [Member]	May 31, 2014 Foreign Currency Forward Contracts Not Designated as Hedges [Member] Forward contracts held to purchase U.S. Dollars [Member]	Aug. 31, 2014 Foreign Currency Forward Contracts Not Designated as Hedges [Member] Forward contracts held to sell U.S. Dollars [Member]	May 31, 2014 Foreign Currency Forward Contracts Not Designated as Hedges [Member] Forward contracts held to sell U.S. Dollars [Member]
Foreign Currency Forward Contracts Not Designated as Hedges (Narrative) [Abstract]
Notional amounts of forward contracts			$ 2,900	$ 3,600	$ 1,400	$ 2,000
Net (losses) gains related to forward contracts	$ (31)	$ 68

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

Name:	us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration