SEGMENT INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2014		Aug. 31, 2013
Revenues Included for Management Reporting Not Recognized in Consolidated Statements of Operations (Narrative) [Abstract]
Cloud software-as-a-service and platform-as-a-service revenues	$ 2	[1]	$ 3	[1]
Software license updates and product support revenues			1	[1]
Hardware systems support revenues	1	[1]	5	[1]
Segment reporting information [Line Items]
Revenues	8,596		8,372
Margin	5,479		5,311
New software licenses and cloud software subscriptions [Member]
Segment reporting information [Line Items]
Revenues	1,707	[2]	1,653	[2]
Cloud software-as-a-service and platform-as-a-service expenses	143		95
Sales and distribution expenses	1,279		1,178
Margin	285	[3]	380	[3]
Cloud infrastructure-as-a-service [Member]
Segment reporting information [Line Items]
Revenues	138		109
Cloud infrastructure-as-a-service expenses	76		67
Sales and distribution expenses	18		20
Margin	44	[3]	22	[3]
Software license updates and product support [Member]
Segment reporting information [Line Items]
Revenues	4,731	[2]	4,432	[2]
Software license updates and product support expenses	257		276
Margin	4,474	[3]	4,156	[3]
Total software and cloud business [Member]
Segment reporting information [Line Items]
Revenues	6,576	[2]	6,194	[2]
Expenses	1,773		1,636
Margin	4,803	[3]	4,558	[3]
Hardware systems products [Member]
Segment reporting information [Line Items]
Revenues	578		669
Hardware systems products expenses	297		329
Sales and distribution expenses	201		217
Margin	80	[3]	123	[3]
Hardware systems support [Member]
Segment reporting information [Line Items]
Revenues	588	[2]	597	[2]
Hardware systems support expenses	184		201
Margin	404	[3]	396	[3]
Total hardware systems business [Member]
Segment reporting information [Line Items]
Revenues	1,166	[2]	1,266	[2]
Expenses	682		747
Margin	484	[3]	519	[3]
Total services business [Member]
Segment reporting information [Line Items]
Revenues	857	[2]	921	[2]
Services expenses	665		687
Margin	192	[3]	234	[3]
Total for operating segments [Member]
Segment reporting information [Line Items]
Revenues	8,599	[2]	8,381	[2]
Expenses	3,120		3,070
Margin	$ 5,479	[3]	$ 5,311	[3]

[1] New software licenses and cloud software subscriptions revenues for management reporting included revenues related to cloud SaaS and PaaS 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 $2 million and $3 million for the three months ended August 31, 2014 and 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 amount of $1 million for the three months ended August 31, 2013. 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 $1 million and $5 million for the three months ended August 31, 2014 and 2013, respectively. See Note 8 for an explanation of these adjustments.

[2] New software licenses and cloud software subscriptions revenues for management reporting included revenues related to cloud SaaS and PaaS 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 $2 million and $3 million for the three months ended August 31, 2014 and 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 amount of $1 million for the three months ended August, 31 2013. 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 $1 million and $5 million for the three months ended August 31, 2014 and 2013, 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. Our new software license and services revenues for management reporting also differ from amounts reported per our consolidated statements of operations for the periods presented due to certain insignificant reclassifications between these lines for management reporting purposes.

[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 income (expense), net.