INTANGIBLE ASSETS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2012		Aug. 31, 2011	May 31, 2012
Total intangible assets [Line Items]
Intangible Assets, Gross	$ 19,472			$ 19,376
In-process research and development	11
Additions	96
Accumulated Amortization	(12,096)			(11,477)
Expense	(619)		(592)
Intangible Assets, Net	7,365
Intangible Assets, Net	7,376			7,899
Intangible assets subject to amortization [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	19,461			19,365
Additions	96
Accumulated Amortization	(12,096)			(11,477)
Expense	(619)
Intangible Assets, Net	7,365			7,888
Weighted Average Useful Life (in years)	6 years	[1]
Intangible assets subject to amortization [Member] | Software support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	5,294			5,294
Accumulated Amortization	(3,477)			(3,330)
Expense	(147)
Intangible Assets, Net	1,817			1,964
Intangible assets subject to amortization [Member] | Hardware systems support agreements and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	768			768
Accumulated Amortization	(295)			(266)
Expense	(29)
Intangible Assets, Net	473			502
Intangible assets subject to amortization [Member] | Developed technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	6,942			6,908
Additions	34
Accumulated Amortization	(4,871)			(4,651)
Expense	(220)
Intangible Assets, Net	2,071			2,257
Weighted Average Useful Life (in years)	5 years	[1]
Intangible assets subject to amortization [Member] | Core technology [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	2,556			2,549
Additions	7
Accumulated Amortization	(1,691)			(1,609)
Expense	(82)
Intangible Assets, Net	865			940
Weighted Average Useful Life (in years)	5 years	[1]
Intangible assets subject to amortization [Member] | Customer relationships and contract backlog [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	2,264			2,260
Additions	4
Accumulated Amortization	(1,387)			(1,287)
Expense	(100)
Intangible Assets, Net	877			973
Weighted Average Useful Life (in years)	1 year	[1]
Intangible assets subject to amortization [Member] | Cloud software subscriptions and related relationships [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	1,037			989
Additions	48
Accumulated Amortization	(67)			(42)
Expense	(25)
Intangible Assets, Net	970			947
Weighted Average Useful Life (in years)	6 years	[1]
Intangible assets subject to amortization [Member] | Trademarks [Member]
Total intangible assets [Line Items]
Intangible Assets, Gross	600			597
Additions	3
Accumulated Amortization	(308)			(292)
Expense	(16)
Intangible Assets, Net	292			305
Weighted Average Useful Life (in years)	6 years	[1]
In-process research and development [Member]
Total intangible assets [Line Items]
In-process research and development	$ 11			$ 11

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