GOODWILL (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2018	May 31, 2017
Goodwill [Line Items]
Balances at period start		$ 43,045	$ 34,590
Goodwill from acquisitions		1,052	8,543
Goodwill adjustments, net	[1]	(342)	(88)
Balances at period end		43,755	43,045
Cloud and License [Member]
Goodwill [Line Items]
Balances at period start		38,791	30,336
Goodwill from acquisitions		1,052	8,543
Goodwill adjustments, net	[1]	(243)	(88)
Balances at period end		39,600	38,791
Hardware [Member]
Goodwill [Line Items]
Balances at period start		2,367	2,367
Goodwill from acquisitions		0	0
Goodwill adjustments, net	[1]	0	0
Balances at period end		2,367	2,367
Services [Member]
Goodwill [Line Items]
Balances at period start		1,887	1,887
Goodwill from acquisitions		0	0
Goodwill adjustments, net	[1]	(99)	0
Balances at period end		$ 1,788	$ 1,887

[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). Amounts also include any changes in goodwill balances for the periods presented that resulted from foreign currency translations.