INTANGIBLE ASSETS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014		Nov. 30, 2013	May 31, 2014
Total intangible assets [Line Items]
Intangible Assets, Gross	$ 18,726		$ 18,726			$ 16,580
Additions			2,146	[1]
Accumulated Amortization	(11,559)		(11,559)			(10,443)
Expense	(568)	(577)	(1,116)		(1,172)
Total intangible assets, net	7,167		7,167			6,137
Intangible assets subject to amortization [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	18,726		18,726			16,550
Additions			2,176	[1]
Accumulated Amortization	(11,559)		(11,559)			(10,443)
Expense			(1,116)
Intangible assets subject to amortization	7,167		7,167			6,107
Weighted Average Useful Life (in years)			12 years	[2]
Intangible assets subject to amortization [Member] | Software support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	6,166		6,166			5,218
Additions			948	[1]
Accumulated Amortization	(4,698)		(4,698)			(4,403)
Expense			(295)
Intangible assets subject to amortization	1,468		1,468			815
Weighted Average Useful Life (in years)			14 years	[2]
Intangible assets subject to amortization [Member] | Hardware systems support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	1,035		1,035			969
Additions			66	[1]
Accumulated Amortization	(602)		(602)			(530)
Expense			(72)
Intangible assets subject to amortization	433		433			439
Weighted Average Useful Life (in years)			8 years	[2]
Intangible assets subject to amortization [Member] | Developed technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	5,172		5,172			4,387
Additions			785	[1]
Accumulated Amortization	(2,524)		(2,524)			(2,176)
Expense			(348)
Intangible assets subject to amortization	2,648		2,648			2,211
Weighted Average Useful Life (in years)			9 years	[2]
Intangible assets subject to amortization [Member] | Core technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	1,617		1,617			1,617
Accumulated Amortization	(1,398)		(1,398)			(1,294)
Expense			(104)
Intangible assets subject to amortization	219		219			323
Intangible assets subject to amortization [Member] | Customer relationships and contract backlog [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	2,212		2,212			2,054
Additions			158	[1]
Accumulated Amortization	(1,616)		(1,616)			(1,459)
Expense			(157)
Intangible assets subject to amortization	596		596			595
Weighted Average Useful Life (in years)			5 years	[2]
Intangible assets subject to amortization [Member] | SaaS and PaaS agreements and related relationships and other [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	1,918		1,918			1,789
Additions			129	[1]
Accumulated Amortization	(403)		(403)			(305)
Expense			(98)
Intangible assets subject to amortization	1,515		1,515			1,484
Weighted Average Useful Life (in years)			11 years	[2]
Intangible assets subject to amortization [Member] | Trademarks [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	606		606			516
Additions			90	[1]
Accumulated Amortization	(318)		(318)			(276)
Expense			(42)
Intangible assets subject to amortization	288		288			240
Weighted Average Useful Life (in years)			20 years	[2]
In-process research and development [Member]
Total intangible assets [Line Items]
In-process research and development						30
Additions			$ (30)

[1] The substantial majority of intangible assets acquired during fiscal 2015 related to our acquisition of MICROS.

[2] Represents weighted average useful lives of intangible assets acquired during fiscal 2015.