INTANGIBLE ASSETS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2013		May 31, 2012	May 31, 2011
Total intangible assets [Line Items]
Intangible Assets, Gross	$ 20,502		$ 19,376
In-process research and development	45
Additions	1,126
Accumulated Amortization	(13,862)		(11,477)
Expense	(2,385)		(2,430)	(2,428)
Intangible Assets, Net	6,595
Intangible Assets, Net	6,640		7,899
Intangible assets subject to amortization [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	20,457		19,365
Additions	1,092
Accumulated Amortization	(13,862)		(11,477)
Expense	(2,385)
Intangible Assets, Net	6,595		7,888
Weighted Average Useful Life (in years)	7 years	[1]
Intangible assets subject to amortization [Member] | Software support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	5,298		5,294
Additions	4
Accumulated Amortization	(3,912)		(3,330)
Expense	(582)
Intangible Assets, Net	1,386		1,964
Weighted Average Useful Life (in years)	5 years	[1]
Intangible assets subject to amortization [Member] | Hardware systems support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	817		768
Additions	49
Accumulated Amortization	(387)		(266)
Expense	(121)
Intangible Assets, Net	430		502
Weighted Average Useful Life (in years)	7 years	[1]
Intangible assets subject to amortization [Member] | Developed technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	7,466		6,908
Additions	558
Accumulated Amortization	(5,477)		(4,651)
Expense	(826)
Intangible Assets, Net	1,989		2,257
Weighted Average Useful Life (in years)	7 years	[1]
Intangible assets subject to amortization [Member] | Core technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	2,579		2,549
Additions	30
Accumulated Amortization	(1,938)		(1,609)
Expense	(329)
Intangible Assets, Net	641		940
Weighted Average Useful Life (in years)	3 years	[1]
Intangible assets subject to amortization [Member] | Customer relationships and contract backlog [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	2,435		2,260
Additions	175
Accumulated Amortization	(1,637)		(1,287)
Expense	(350)
Intangible Assets, Net	798		973
Weighted Average Useful Life (in years)	6 years	[1]
Intangible assets subject to amortization [Member] | Cloud software subscriptions and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	1,227		989
Additions	238
Accumulated Amortization	(155)		(42)
Expense	(113)
Intangible Assets, Net	1,072		947
Weighted Average Useful Life (in years)	8 years	[1]
Intangible assets subject to amortization [Member] | Trademarks [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	635		597
Additions	38
Accumulated Amortization	(356)		(292)
Expense	(64)
Intangible Assets, Net	279		305
Weighted Average Useful Life (in years)	8 years	[1]
In-process research and development [Member]
Total intangible assets [Line Items]
In-process research and development	45		11
Additions	$ 34

[1] Represents weighted average useful lives of intangible assets acquired during fiscal 2013.