INTANGIBLE ASSETS (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2016	May 31, 2015	May 31, 2014
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 11,566	$ 15,047
Additions		175
Retirements		(3,656)
Accumulated Amortization		(6,623)	(8,641)
Expense		(1,638)	(2,149)	$ (2,300)
Retirements		3,656
Total intangible assets, net		$ 4,943	6,406
Intangible assets subject to amortization [Member]
Total intangible assets [Line Items]
Weighted Average Useful Life (in years)	[1]	7 years
Intangible assets subject to amortization [Member] | Software support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 2,419	4,190
Retirements		(1,771)
Accumulated Amortization		(1,287)	(2,700)
Expense		(358)
Retirements		1,771
Intangible assets subject to amortization		1,132	1,490
Intangible assets subject to amortization [Member] | Hardware support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		1,010	1,012
Retirements		(2)
Accumulated Amortization		(797)	(654)
Expense		(145)
Retirements		2
Intangible assets subject to amortization		213	358
Intangible assets subject to amortization [Member] | Developed technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		3,661	4,602
Additions		97
Retirements		(1,038)
Accumulated Amortization		(1,876)	(2,355)
Expense		(559)
Retirements		1,038
Intangible assets subject to amortization		$ 1,785	2,247
Weighted Average Useful Life (in years)	[1]	5 years
Intangible assets subject to amortization [Member] | Core Technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 552	552
Accumulated Amortization		(500)	(411)
Expense		(89)
Intangible assets subject to amortization		52	141
Intangible assets subject to amortization [Member] | Customer relationships and contract backlog [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		1,399	2,197
Additions		8
Retirements		(806)
Accumulated Amortization		(1,121)	(1,710)
Expense		(217)
Retirements		806
Intangible assets subject to amortization		$ 278	487
Weighted Average Useful Life (in years)	[1]	3 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		$ 2,034	1,993
Additions		57
Retirements		(16)
Accumulated Amortization		(704)	(508)
Expense		(212)
Retirements		16
Intangible assets subject to amortization		$ 1,330	1,485
Weighted Average Useful Life (in years)	[1]	10 years
Intangible assets subject to amortization [Member] | Trademarks [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross		$ 491	501
Additions		13
Retirements		(23)
Accumulated Amortization		(338)	(303)
Expense		(58)
Retirements		23
Intangible assets subject to amortization		$ 153	$ 198
Weighted Average Useful Life (in years)	[1]	5 years

[1] Represents weighted average useful lives of intangible assets acquired during fiscal 2016