INCOME TAXES Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Deferred Tax Assets and Liabilities (Narrative) [Abstract]
Temporary differences related to undistributed foreign earnings	$ 42,600
Other outside basis temporary differences of investments in foreign subsidiaries	8,300
Potential net deferred tax liability associated with these undistributed foreign earnings	13,300
Potential net deferred tax liability related to other outside basis temporary differences	2,700
Net deferred tax assets	1,131	$ 993
Valuation allowance	$ 1,173	1,024
Income Tax Uncertainties [Abstract]
Income tax examinations	Our U.S. federal income tax returns have been examined for all years prior to fiscal 2007 and we are no longer subject to audit for those periods. Our U.S. state income tax returns, with some exceptions, have been examined for all years prior to fiscal 2004 and we are no longer subject to audit for those periods. With some exceptions, we are generally no longer subject to tax examinations in non-U.S. jurisdictions for years prior to fiscal 1997. In some, although not all, cases, we have reserved for potential adjustments to our provision for income taxes and accrual of indirect taxes that may result from examinations by, or any negotiated agreements with, these tax authorities or final outcomes in judicial proceedings, and we believe that the final outcome of these examinations, agreements or judicial proceedings will not have a material effect on our results of operations.
Tax Credit Carryforward [Line Items]
Tax credit carryforwards subject to limitation on utilization	$ 1,200
Tax credit carryforwards not subject to expiration dates	652
Tax credit carryforwards subject to expiration dates	541
Unrecognized Tax Benefits (Narrative) [Abstract]
Unrecognized tax benefits that would affect our effective tax rate if recognized	3,100	2,800	$ 2,600
Interest and penalties related to uncertain tax positions accrued	765	756
Interest and penalties related to uncertain tax positions recognized in our provision for income taxes	26	$ 102	$ 24
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits related to domestic audits, net of offsetting tax benefits	176
Reasonably possible decrease in gross unrecognized tax benefits related to foreign audits, net of offsetting tax benefits	$ 74
Earliest Tax Year [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward expiration dates	May 31, 2017
Latest Tax Year [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward expiration dates	May 31, 2035
Federal [Member]
Operating loss carryforwards [Line Items]
Net operating loss carryforwards	$ 758
Federal [Member] | Earliest Tax Year [Member]
Operating loss carryforwards [Line Items]
Operating loss carryforwards expiration date	May 31, 2017
Federal [Member] | Latest Tax Year [Member]
Operating loss carryforwards [Line Items]
Operating loss carryforwards expiration date	May 31, 2035
State [Member]
Operating loss carryforwards [Line Items]
Net operating loss carryforwards	$ 2,700
State [Member] | Earliest Tax Year [Member]
Operating loss carryforwards [Line Items]
Operating loss carryforwards expiration date	May 31, 2017
State [Member] | Latest Tax Year [Member]
Operating loss carryforwards [Line Items]
Operating loss carryforwards expiration date	May 31, 2035
Foreign [Member]
Operating loss carryforwards [Line Items]
Net operating loss carryforwards	$ 1,600
Foreign net operating loss carryforwards not subject to expiration	1,400
Foreign net operating loss carryforwards subject to expiration	240
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits	$ 199
Foreign [Member] | Earliest Tax Year [Member]
Operating loss carryforwards [Line Items]
Operating loss carryforwards expiration date	May 31, 2017
Foreign [Member] | Latest Tax Year [Member]
Operating loss carryforwards [Line Items]
Operating loss carryforwards expiration date	May 31, 2036
Domestic [Member]
Operating loss carryforwards [Line Items]
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits	$ 228