SEGMENT INFORMATION RECONCILIATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Nov. 30, 2014		Nov. 30, 2013		Nov. 30, 2014		Nov. 30, 2013
Reconciliation of Total Operating Segment Margin to Income Before Provision for Income Taxes [Abstract]
Total margin for operating segments	$ 6,097		$ 5,885		$ 11,575		$ 11,197
Cloud software-as-a-service and platform-as-a-service revenues	(3)	[1]	(3)	[1]	(5)	[1]	(7)	[1]
Software license updates and product support revenues	(5)	[1]	(1)	[1]	(6)	[1]	(1)	[1]
Hardware systems support revenues	(2)	[1]	(4)	[1]	(2)	[1]	(10)	[1]
Product development	(1,209)		(1,139)		(2,382)		(2,235)
Marketing and partner program expenses	(135)		(146)		(254)		(277)
Corporate, general and administrative and information technology expenses	(362)		(354)		(729)		(699)
Amortization of intangible assets	(568)		(577)		(1,116)		(1,172)
Acquisition related and other	20		(17)		(4)		(27)
Restructuring	(51)		(52)		(120)		(108)
Stock-based compensation	(240)		(182)		(451)		(378)
Interest expense	(282)		(230)		(544)		(446)
Non-operating income, net	9		23		25		29
Income before provision for income taxes	3,269		3,203		5,987		5,866
Reconciliation of Total Operating Segment Revenues to Total Revenues [Line Items]
Cloud software-as-a-service and platform-as-a-service revenues	(3)	[1]	(3)	[1]	(5)	[1]	(7)	[1]
Software license updates and product support revenues	(5)	[1]	(1)	[1]	(6)	[1]	(1)	[1]
Hardware systems support revenues	(2)	[1]	(4)	[1]	(2)	[1]	(10)	[1]
Total revenues	9,598		9,275		18,194		17,647
Total for operating segments [Member]
Reconciliation of Total Operating Segment Margin to Income Before Provision for Income Taxes [Abstract]
Total margin for operating segments	6,097	[2]	5,885	[2]	11,575	[2]	11,197	[2]
Reconciliation of Total Operating Segment Revenues to Total Revenues [Line Items]
Total revenues	$ 9,608	[3]	$ 9,283	[3]	$ 18,207	[3]	$ 17,665	[3]

[1] New software licenses and cloud software subscriptions revenues, software license updates and product support revenues and hardware systems support revenues for management reporting included revenues that would have otherwise been recorded by our acquired businesses as independent entities but were not recognized in the accompanying condensed consolidated statements of operations for the periods presented due to business combination accounting requirements. Refer to footnote (1) of our business and operating segments summary results table above in this Note 12 for additional information.

[2] 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.

[3] 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 amount of $3 million for each of the three months ended November 30, 2014 and 2013, and $5 million and $7 million for the six months ended November 30, 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 amounts of $5 million and $1 million for the three months ended November 30, 2014 and 2013, respectively, and $6 million and $1 million for the six months ended November 30, 2014 and 2013, 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 $4 million for the three months ended November 30, 2014 and 2013, respectively, and $2 million and $10 million for the six months ended November 30, 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.