INTANGIBLE ASSETS (Details) - USD ($) $ in Millions		12 Months Ended
		May. 31, 2015	May. 31, 2014	May. 31, 2013
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 15,047	$ 16,580
Additions	[1]	2,418
Retirements		(3,951)
Accumulated Amortization		(8,641)	(10,443)
Expense		(2,149)	(2,300)	$ (2,385)
Retirements		3,951
Total intangible assets, net		6,406	6,137
Intangible assets subject to amortization [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		15,047	16,550
Additions	[1]	2,448
Retirements		(3,951)
Accumulated Amortization		(8,641)	(10,443)
Expense		(2,149)
Retirements		3,951
Intangible assets subject to amortization		$ 6,406	6,107
Weighted Average Useful Life (in years)	[2]	10 years
Intangible assets subject to amortization [Member] | Software support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 4,190	5,218
Additions	[1]	1,206
Retirements		(2,234)
Accumulated Amortization		(2,700)	(4,403)
Expense		(531)
Retirements		2,234
Intangible assets subject to amortization		$ 1,490	815
Weighted Average Useful Life (in years)	[2]	13 years
Intangible assets subject to amortization [Member] | Hardware systems support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 1,012	969
Additions	[1]	63
Retirements		(20)
Accumulated Amortization		(654)	(530)
Expense		(144)
Retirements		20
Intangible assets subject to amortization		$ 358	439
Weighted Average Useful Life (in years)	[2]	10 years
Intangible assets subject to amortization [Member] | Developed technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 4,602	4,387
Additions	[1]	736
Retirements		(521)
Accumulated Amortization		(2,355)	(2,176)
Expense		(700)
Retirements		521
Intangible assets subject to amortization		$ 2,247	2,211
Weighted Average Useful Life (in years)	[2]	7 years
Intangible assets subject to amortization [Member] | Core technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 552	1,617
Retirements		(1,065)
Accumulated Amortization		(411)	(1,294)
Expense		(182)
Retirements		1,065
Intangible assets subject to amortization		141	323
Intangible assets subject to amortization [Member] | Customer relationships and contract backlog [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		2,197	2,054
Additions	[1]	204
Retirements		(61)
Accumulated Amortization		(1,710)	(1,459)
Expense		(312)
Retirements		61
Intangible assets subject to amortization		$ 487	595
Weighted Average Useful Life (in years)	[2]	6 years
Intangible assets subject to amortization [Member] | SaaS, PaaS and IaaS agreements and related relationships and other [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 1,993	1,789
Additions	[1]	204
Accumulated Amortization		(508)	(305)
Expense		(203)
Intangible assets subject to amortization		$ 1,485	1,484
Weighted Average Useful Life (in years)	[2]	10 years
Intangible assets subject to amortization [Member] | Trademarks [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 501	516
Additions	[1]	35
Retirements		(50)
Accumulated Amortization		(303)	(276)
Expense		(77)
Retirements		50
Intangible assets subject to amortization		$ 198	240
Weighted Average Useful Life (in years)	[2]	10 years
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.