COMMITMENTS AND CERTAIN CONTINGENCIES (Details) - USD ($) $ in Millions	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Guarantees [Abstract]
Financial impact of guarantees	Such agreements have not had a material effect on our results of operations, financial position or cash flows.
Lease Commitments [Abstract]
Fiscal 2016	$ 330
Fiscal 2017	270
Fiscal 2018	209
Fiscal 2019	156
Fiscal 2020	107
Thereafter	175
Future minimum operating lease payments	1,247
Less: minimum payments to be received from non-cancelable subleases	(71)
Total future minimum operating leases payments, net	1,176
Facility obligations, net of estimated sub-lease income and other costs, in accrued restructuring	61
Rent expense, net of sublease income	290	$ 278	$ 313
Sublease income	45	55	$ 69
Unconditional Obligations [Abstract]
Fiscal 2016	713
Fiscal 2017	195
Fiscal 2018	124
Fiscal 2019	85
Fiscal 2020	64
Total	1,181
Notes payable and other borrowings outstanding	$ 41,958	$ 24,097