SEGMENT INFORMATION (Details) - USD ($) $ in Millions		12 Months Ended
		May. 31, 2015	May. 31, 2014	May. 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	[1]	$ 12	$ 17	$ 45
Software license updates and product support revenues	[1]	11	3	14
Hardware systems support revenues	[1]	4	11	14
Segment reporting information [Line Items]
Revenues		38,226	38,275	37,180
Margin		24,221	24,647	23,945
New software licenses and cloud software subscriptions [Member]
Segment reporting information [Line Items]
Revenues	[2]	10,025	10,542	10,350
Cloud software as a service and platform as a service expenses		742	437	313
Sales and distribution expenses		5,812	5,666	5,227
Margin	[3]	3,471	4,439	4,810
Cloud infrastructure as a service [Member]
Segment reporting information [Line Items]
Revenues		608	456	457
Cloud infrastructure as a service expenses		329	304	296
Sales and distribution expenses		89	61	61
Margin	[3]	190	91	100
Software license updates and product support [Member]
Segment reporting information [Line Items]
Revenues	[2]	18,858	18,209	17,156
Software license updates and product support expenses		1,130	1,111	1,120
Margin	[3]	17,728	17,098	16,036
Total software and cloud business [Member]
Segment reporting information [Line Items]
Revenues	[2]	29,491	29,207	27,963
Expenses		8,102	7,579	7,017
Margin	[3]	21,389	21,628	20,946
Hardware systems products [Member]
Segment reporting information [Line Items]
Revenues		2,825	2,976	3,033
Hardware systems products expenses		1,465	1,516	1,498
Sales and distribution expenses		864	940	885
Margin	[3]	496	520	650
Hardware systems support [Member]
Segment reporting information [Line Items]
Revenues	[2]	2,384	2,407	2,327
Hardware systems support expenses		783	802	857
Margin	[3]	1,601	1,605	1,470
Total hardware systems business [Member]
Segment reporting information [Line Items]
Revenues	[2]	5,209	5,383	5,360
Expenses		3,112	3,258	3,240
Margin	[3]	2,097	2,125	2,120
Total services business [Member]
Segment reporting information [Line Items]
Revenues	[2]	3,553	3,716	3,930
Services expenses		2,818	2,822	3,051
Margin	[3]	735	894	879
Total for operating segments [Member]
Segment reporting information [Line Items]
Revenues	[2]	38,253	38,306	37,253
Expenses		14,032	13,659	13,308
Margin	[3]	$ 24,221	$ 24,647	$ 23,945

[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 consolidated statements of operations for the periods presented due to business combination accounting requirements. Refer to footnote one to our business and operating segments summary results table above in this Note 16 for additional information.

[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 consolidated statements of operations in the amounts of $12 million, $17 million and $45 million for fiscal 2015, 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 consolidated statements of operations in the amounts of $11 million, $3 million and $14 million for fiscal 2015, 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 $4 million, $11 million and $14 million for fiscal 2015, 2014 and 2013, respectively. See Note 10 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 reported 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.