COMMITMENTS AND CERTAIN CONTINGENCIES (Details) - USD ($) $ in Millions	12 Months Ended
May 31, 2016	May 31, 2015	May 31, 2014
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 2017	$ 328
Fiscal 2018	273
Fiscal 2019	211
Fiscal 2020	152
Fiscal 2021	110
Thereafter	164
Future minimum operating lease payments	1,238
Less: minimum payments to be received from non-cancelable subleases	(57)
Total future minimum operating leases payments, net	1,181
Facility obligations, net of estimated sub-lease income and other costs, in accrued restructuring	54
Rent expense, net of sublease income	283	$ 290	$ 278
Sublease income	45	$ 45	$ 55
Unconditional Obligations [Abstract]
Fiscal 2017	574
Fiscal 2018	153
Fiscal 2019	91
Fiscal 2020	68
Fiscal 2021	8
Total	$ 894

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