GOODWILL (Details) $ in Millions	3 Months Ended
	Aug. 31, 2016 USD ($)
Goodwill [Line Items]
Balances at period start	$ 34,590
Goodwill from acquisitions	777
Goodwill adjustments, net	(17)	[1]
Balances at period end	35,350
Cloud Software and On-Premise Software [Member]
Goodwill [Line Items]
Balances at period start	15,747
Goodwill from acquisitions	777
Goodwill adjustments, net	(17)	[1]
Balances at period end	16,507
Software License Updates and Product Support [Member]
Goodwill [Line Items]
Balances at period start	14,439
Goodwill from acquisitions	0
Goodwill adjustments, net	0	[1]
Balances at period end	14,439
Hardware Support [Member]
Goodwill [Line Items]
Balances at period start	2,367
Goodwill from acquisitions	0
Goodwill adjustments, net	0	[1]
Balances at period end	2,367
Consulting [Member]
Goodwill [Line Items]
Balances at period start	1,759
Goodwill from acquisitions	0
Goodwill adjustments, net	0	[1]
Balances at period end	1,759
Other, net [Member]
Goodwill [Line Items]
Balances at period start	278	[2]
Goodwill from acquisitions	0	[2]
Goodwill adjustments, net	0	[1],[2]
Balances at period end	$ 278	[2]

[1] Pursuant to our business combinations accounting policy, we recorded goodwill adjustments for the effects on goodwill of changes to net assets acquired during the period that such a change is identified, provided that any such change is within the measurement period (up to one year from the date of the acquisition)

[2] Represents goodwill allocated to our other operating segments