ACQUISITIONS (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			3 Months Ended	1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended		3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	May 31, 2013	Aug. 31, 2013 Other Fiscal 2014 Acquisitions [Member]	Mar. 31, 2013 Acme Packet, Inc. [Member]	Aug. 31, 2013 Acme Packet, Inc. [Member]	Mar. 28, 2013 Acme Packet, Inc. [Member]	Feb. 28, 2013 Eloqua, Inc. [Member]	Aug. 31, 2013 Eloqua, Inc. [Member]	Feb. 08, 2013 Eloqua, Inc. [Member]	Aug. 31, 2013 Other Fiscal 2013 Acquisitions [Member]
Acquisitions [Line Items]
Acquisition completion date						Mar. 28, 2013			Feb. 08, 2013
Total preliminary purchase price				$ 1,400	$ 2,100			$ 935
Cash portion of purchase price				1,400	2,100			933
Fair value of stock options and restricted stock-based awards assumed					12			2
Identifiable intangible assets recorded				770			525			327
In-process research and development recorded				99	45
Net tangible assets (liabilities) assumed				(93)			258			1
Goodwill	27,965		27,343	615			1,300			607
Materiality of acquisitions individually or in the aggregate											These acquisitions were not significant individually or in the aggregate.
Acquisitions Proforma [Abstract]
Total revenues	8,378	8,413
Net income	$ 2,170	$ 2,007
Basic earnings per share (in dollars per share)	$ 0.47	$ 0.41
Diluted earnings per share (in dollars per share)	$ 0.46	$ 0.41