ACQUISITIONS (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended				9 Months Ended		9 Months Ended	12 Months Ended		12 Months Ended		9 Months Ended	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013 Acme Packet, Inc. [Member]	Feb. 04, 2013 Acme Packet, Inc. [Member]	Feb. 28, 2013 Eloqua, Inc. [Member]	Feb. 08, 2013 Eloqua, Inc. [Member]	Feb. 28, 2013 Other Fiscal 2013 Acquisitions [Member]	May 31, 2012 Taleo Corporation [Member]	Apr. 05, 2012 Taleo Corporation [Member]	May 31, 2012 RightNow Technologies, Inc. [Member]	Jan. 25, 2012 RightNow Technologies, Inc. [Member]	Feb. 28, 2013 Pillar Data Systems, Inc. [Member]	May 31, 2012 Pillar Data Systems, Inc. [Member]	Jul. 18, 2011 Pillar Data Systems, Inc. [Member]	May 31, 2012 Other Fiscal 2012 Acquisitions [Member]
Acquisitions [Line Items]
Amount to be paid in cash per share of common stock upon the consummation of the merger (in dollars per share)						$ 29.25
Estimated total purchase price						$ 2,100
Materiality of acquisitions individually or in the aggregate									These acquisitions were not significant individually or in the aggregate.
Acquisition completion date							Feb. 08, 2013			Apr. 05, 2012		Jan. 25, 2012			Jul. 18, 2011
Merger agreement date					Feb. 04, 2013										Jun. 29, 2011
Total purchase price								935			2,000		1,500				1,600
Purchase price payable consisting of estimated fair value of the liability for contingent consideration																346
Cash portion of purchase price								933			2,000		1,500				1,600
Fair value of stock options and restricted stock-based awards assumed								2			10		14				5
Identifiable intangible assets recorded								327			1,100		697			142	540
Net tangible assets (liabilities) assumed								(1)			(267)		(259)			(16)	29
Residual goodwill								609			1,200		1,100			220	1,100
Estimated fair value of the Earn-Out Liability														269
Amount of Earn-Out that an affiliate of Mr. Ellison has the first preference right to receive																565
Percentage right that an affiliate of Mr. Ellison has over any amount of the Earn-Out that exceeds $565 million																55.00%
Net benefit to acquisition related and other expenses			118											118
Acquisitions Pro Forma [Abstract]
Total revenues	8,976	9,194	26,304	26,765
Net income	$ 2,494	$ 2,423	$ 7,070	$ 6,247
Basic earnings per share (in dollars per share)	$ 0.53	$ 0.48	$ 1.47	$ 1.24
Diluted earnings per share (in dollars per share)	$ 0.52	$ 0.48	$ 1.45	$ 1.22