SEGMENT INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Feb. 28, 2013		Feb. 29, 2012		Feb. 28, 2013		Feb. 29, 2012
Revenues Included for Management Reporting Not Recognized in Consolidated Statements of Operations (Narrative) [Abstract]
New software licenses and cloud software subscriptions revenues	$ 6	[1]			$ 37	[1]
Software license updates and product support revenues	4	[1]	17	[1]	12	[1]	40	[1]
Hardware systems support revenues	2	[1]	6	[1]	10	[1]	26	[1]
Segment Reporting Information [Line Items]
Revenues	8,970	[2]	9,062	[2]	26,292	[2]	26,271	[2]
Expenses	3,239		3,336		9,574		10,039
Margin	5,731	[3]	5,726	[3]	16,718	[3]	16,232	[3]
New software licenses and cloud software subscriptions [Member]
Segment Reporting Information [Line Items]
Revenues	2,334	[2]	2,370	[2]	6,321	[2]	5,908	[2]
Sales and distribution expenses	1,379		1,239		3,812		3,595
Margin	955	[3]	1,131	[3]	2,509	[3]	2,313	[3]
Software license updates and product support [Member]
Segment Reporting Information [Line Items]
Revenues	4,344	[2]	4,068	[2]	12,752	[2]	12,098	[2]
Software license updates and product support expenses	276		282		808		824
Margin	4,068	[3]	3,786	[3]	11,944	[3]	11,274	[3]
Total software business [Member]
Segment Reporting Information [Line Items]
Revenues	6,678	[2]	6,438	[2]	19,073	[2]	18,006	[2]
Expenses	1,655		1,521		4,620		4,419
Margin	5,023	[3]	4,917	[3]	14,453	[3]	13,587	[3]
Hardware systems products [Member]
Segment Reporting Information [Line Items]
Revenues	671		869		2,185		2,851
Hardware systems products expenses	336		425		1,086		1,365
Sales and distribution expenses	212		250		643		788
Margin	123	[3]	194	[3]	456	[3]	698	[3]
Hardware systems support [Member]
Segment Reporting Information [Line Items]
Revenues	572	[2]	610	[2]	1,740	[2]	1,900	[2]
Hardware systems support expenses	210		247		646		767
Margin	362	[3]	363	[3]	1,094	[3]	1,133	[3]
Total hardware systems business [Member]
Segment Reporting Information [Line Items]
Revenues	1,243	[2]	1,479	[2]	3,925	[2]	4,751	[2]
Expenses	758		922		2,375		2,920
Margin	485	[3]	557	[3]	1,550	[3]	1,831	[3]
Total services business [Member]
Segment Reporting Information [Line Items]
Revenues	1,049	[2]	1,145	[2]	3,294	[2]	3,514	[2]
Services expenses	826		893		2,579		2,700
Margin	$ 223	[3]	$ 252	[3]	$ 715	[3]	$ 814	[3]

[1] New software licenses and cloud software subscriptions revenues for management reporting included revenues related to cloud software subscriptions contracts that would have otherwise been recorded by the acquired businesses as independent entities but were not recognized in the accompanying condensed consolidated statements of operations in the amounts of $6 million and $37 million for the three and nine months ended February 28, 2013, respectively. Software license updates and product support revenues for management reporting included revenues related to software support contracts that would have otherwise been recorded by the acquired businesses as independent entities but were not recognized in the accompanying condensed consolidated statements of operations in the amounts of $4 million and $17 million for the three months ended February 28, 2013 and February 29, 2012, respectively, and $12 million and $40 million for the nine months ended February 28, 2013 and February 29, 2012, respectively. In addition, we did not recognize hardware systems support revenues related to hardware systems support contracts that would have otherwise been recorded by the acquired businesses as independent entities in the amounts of $2 million and $6 million for the three months ended February 28, 2013 and February 29, 2012, respectively, and $10 million and $26 million for the nine months ended February 28, 2013 and February 29, 2012, respectively.

[2] Operating segment revenues generally differ from the external reporting classifications due to certain software license products that are classified as service revenues for management reporting purposes. New software licenses and cloud software subscriptions revenues for management reporting included revenues related to cloud software subscriptions contracts that would have otherwise been recorded by the acquired businesses as independent entities but were not recognized in the accompanying condensed consolidated statements of operations in the amounts of $6 million and $37 million for the three and nine months ended February 28, 2013, respectively. Software license updates and product support revenues for management reporting included revenues related to software support contracts that would have otherwise been recorded by the acquired businesses as independent entities but were not recognized in the accompanying condensed consolidated statements of operations in the amounts of $4 million and $17 million for the three months ended February 28, 2013 and February 29, 2012, respectively, and $12 million and $40 million for the nine months ended February 28, 2013 and February 29, 2012, respectively. In addition, we did not recognize hardware systems support revenues related to hardware systems support contracts that would have otherwise been recorded by the acquired businesses as independent entities in the amounts of $2 million and $6 million for the three months ended February 28, 2013 and February 29, 2012, respectively, and $10 million and $26 million for the nine months ended February 28, 2013 and February 29, 2012, respectively. See Note 8 for an explanation of these adjustments and the table below for a reconciliation of our total operating segment revenues to our total revenues.

[3] The margins reported reflect only the direct controllable costs of each line of business and do not include allocations of product development, marketing and partner programs, and corporate, general and administrative and information technology expenses. Additionally, the margins do not reflect amortization of intangible assets, acquisition related and other expenses, restructuring expenses, stock-based compensation, interest expense or certain other expenses, net.