INCOME TAXES Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2011
Deferred Tax Assets and Liabilities (Narrative) [Abstract]
Temporary differences related to undistributed foreign earnings	$ 26,200
Other outside basis temporary differences of investments in foreign subsidiaries	6,900
Potential net deferred tax liability associated with these undistributed foreign earnings	8,000
Potential net deferred tax liability related to other outside basis temporary differences	2,200
Net deferred tax assets	1,456	1,396
Valuation allowance	999	728
Income Tax Examinations [Abstract]
Income tax examinations	Our U.S. federal and, with some exceptions, our state income tax returns have been examined for all years prior to fiscal 2000 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 1998.
Tax Credit Carryforwards [Abstract]
Tax credit carryforwards subject to limitation on utilization	1,100
Tax credit carryforwards not subject to expiration dates	571
Tax credit carryforwards subject to expiration dates	554
Tax credit carryforward expiration dates	between fiscal 2014 and fiscal 2033
Unrecognized Tax Benefits (Narrative) [Abstract]
Unrecognized tax benefits that would affect our effective tax rate, if recognized	3,601
Interest and penalties related to uncertain tax positions recognized in our provision for income taxes	31	46	22
Interest and penalties related to uncertain tax positions accrued	666	683
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits related to domestic audits	381
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits related to domestic audits, net of offsetting tax benefits	280
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits related to foreign audits	125
Reasonably possible decrease in gross unrecognized tax benefits related to foreign audits, net of offsetting tax benefits	93
Federal [Member]
Operating loss carryforwards [Line Items]
Net operating loss carryforwards	1,200
Operating loss carryforwards expiration dates	between ficsal 2016 and fiscal 2032
State [Member]
Operating loss carryforwards [Line Items]
Net operating loss carryforwards	2,600
Operating loss carryforwards expiration dates	between fiscal 2014 and fiscal 2032
Foreign [Member]
Operating loss carryforwards [Line Items]
Net operating loss carryforwards	1,800
Foreign net operating loss carryforwards not subject to expiration	1,500
Foreign net operating loss carryforwards subject to expiration	$ 274
Operating loss carryforwards expiration dates	between fiscal 2014 and fiscal 2033