ACQUISITIONS (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended				12 Months Ended
	Sep. 30, 2014	Feb. 28, 2014	Mar. 31, 2013	Feb. 28, 2013	May. 31, 2015	May. 31, 2014	May. 31, 2013	Sep. 08, 2014	Aug. 31, 2014	Jul. 03, 2014	Feb. 06, 2014	Mar. 28, 2013	Feb. 08, 2013
Acquisitions [Line Items]
Fair value of stock options and restricted stock-based awards assumed					$ 12	$ 148	$ 15
Goodwill					34,087	29,652	27,343
Net benefit to acquistion related and other expenses							387
Acquisitions Proforma [Abstract]
Total revenues					38,700	40,007
Net income					$ 9,877	$ 10,770
Basic earnings per share (in dollars per share)					$ 2.24	$ 2.38
Diluted earnings per share (in dollars per share)					$ 2.19	$ 2.34
MICROS Systems, Inc. [Member]
Acquisitions [Line Items]
Merger agreement date					Jun. 22, 2014
Total purchase price	$ 5,247
Cash and cash equivalents								$ 675
Trade receivables, net								183
Inventories								44
Goodwill								3,277
Intangible assets								2,030
Other assets								149
Accounts payable and other liabilities								(348)
Deferred tax liabilities, net								(633)
Deferred revenues								$ (130)
Business acquisition per share price								$ 68.00		$ 68.00
Business combination reason					We acquired MICROS to, among other things, expand our software and cloud, hardware and related services offerings for hotels, food and beverage industries, facilities, and retailers.
Other Fiscal 2015 Acquisitions [Member]
Acquisitions [Line Items]
Total purchase price					$ 1,700
Cash portion of purchase price					1,700
Fair value of stock options and restricted stock-based awards assumed					7
Goodwill					1,300
Intangible assets					388
Net tangible assets (liabilities) acquired/assumed					$ 14
Responsys, Inc. [Member]
Acquisitions [Line Items]
Acquisition completion date					Feb. 06, 2014
Total purchase price		$ 1,600
Cash portion of purchase price		1,400
Fair value of stock options and restricted stock-based awards assumed		$ 147
Goodwill											$ 1,000
Intangible assets											580
Net tangible assets (liabilities) acquired/assumed											(32)
In-process research and development recorded											$ 14
Other Fiscal 2014 Acquisitions [Member]
Acquisitions [Line Items]
Total purchase price						$ 2,300
Goodwill						1,300
Intangible assets						1,100
Net tangible assets (liabilities) acquired/assumed						(230)
In-process research and development recorded						$ 99
Acme Packet, Inc. [Member]
Acquisitions [Line Items]
Acquisition completion date					Mar. 28, 2013
Total purchase price			$ 2,100
Cash portion of purchase price			2,100
Fair value of stock options and restricted stock-based awards assumed			$ 12
Goodwill												$ 1,300
Intangible assets												525
Net tangible assets (liabilities) acquired/assumed												247
In-process research and development recorded												$ 45
Eloqua, Inc. [Member]
Acquisitions [Line Items]
Acquisition completion date					Feb. 08, 2013
Total purchase price				$ 935
Cash portion of purchase price				933
Fair value of stock options and restricted stock-based awards assumed				$ 2
Goodwill													$ 607
Intangible assets													327
Net tangible assets (liabilities) acquired/assumed													$ 1
Other Fiscal 2013 Acquisitions [Member]
Acquisitions [Line Items]
Materiality of acquisitions individually or in the aggregate					These acquisitions were not significant individually or in the aggregate.
Pillar Data Systems, Inc. [Member]
Acquisitions [Line Items]
Merger agreement date					Jun. 29, 2011
Contingent consideration paid or payable							0		$ 0
Net benefit to acquistion related and other expenses							$ 387