GOODWILL (Details) $ in Millions	9 Months Ended
	Feb. 29, 2016 USD ($)
Goodwill [Line Items]
Balances at period start	$ 34,087
Goodwill from acquisitions	211
Goodwill adjustments, net	(14)	[1]
Balances at period end	34,284
Cloud Software and On-premise Software [Member]
Goodwill [Line Items]
Balances at period start	15,217
Goodwill from acquisitions	211
Goodwill adjustments, net	12	[1]
Balances at period end	15,440
Software License Updates and Product Support [Member]
Goodwill [Line Items]
Balances at period start	14,461
Goodwill adjustments, net	(21)	[1]
Balances at period end	14,440
Hardware Support [Member]
Goodwill [Line Items]
Balances at period start	2,370
Goodwill adjustments, net	(3)	[1]
Balances at period end	2,367
Consulting [Member]
Goodwill [Line Items]
Balances at period start	1,759
Balances at period end	1,759
Other [Member]
Goodwill [Line Items]
Balances at period start	280	[2]
Goodwill adjustments, net	(2)	[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.