SEGMENT INFORMATION (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2016	May 31, 2015	May 31, 2014
Segment reporting information [Line Items]
Revenues		$ 37,047	$ 38,226	$ 38,275
Margin		22,904	24,221	24,647
Cloud software and on-premise software [Member]
Segment reporting information [Line Items]
Revenues	[1]	9,488	10,025	10,542
Cloud software as a service and platform as a service expenses		1,116	742	437
Sales and distribution expenses		6,010	5,812	5,666
Margin	[2]	2,362	3,471	4,439
Cloud infrastructure as a service [Member]
Segment reporting information [Line Items]
Revenues		646	608	456
Cloud infrastructure as a service expenses		352	329	304
Sales and distribution expenses		74	89	61
Margin	[2]	220	190	91
Software license updates and product support [Member]
Segment reporting information [Line Items]
Revenues	[1]	18,863	18,858	18,209
Software license updates and product support expenses		1,077	1,130	1,111
Margin	[2]	17,786	17,728	17,098
Total cloud and on-premise software business [Member]
Segment reporting information [Line Items]
Revenues	[1]	28,997	29,491	29,207
Expenses		8,629	8,102	7,579
Margin	[2]	20,368	21,389	21,628
Hardware products [Member]
Segment reporting information [Line Items]
Revenues		2,471	2,825	2,976
Hardware products expenses		1,364	1,465	1,516
Sales and distribution expenses		850	864	940
Margin	[2]	257	496	520
Hardware support [Member]
Segment reporting information [Line Items]
Revenues	[1]	2,198	2,384	2,407
Hardware support expenses		665	783	802
Margin	[2]	1,533	1,601	1,605
Total hardware business [Member]
Segment reporting information [Line Items]
Revenues	[1]	4,669	5,209	5,383
Expenses		2,879	3,112	3,258
Margin	[2]	1,790	2,097	2,125
Total services business [Member]
Segment reporting information [Line Items]
Revenues	[1]	3,391	3,553	3,716
Services expenses		2,645	2,818	2,822
Margin	[2]	746	735	894
Total for operating segments [Member]
Segment reporting information [Line Items]
Revenues	[1]	37,057	38,253	38,306
Expenses		14,153	14,032	13,659
Margin	[2]	$ 22,904	$ 24,221	$ 24,647

[1] Cloud software and on-premise software, software license updates and product support and hardware support revenues for management reporting included revenues related to cloud SaaS and PaaS, software support and hardware support contracts that would have otherwise been recorded by the acquired businesses as independent entities but were not recognized in our consolidated statements of operations for the periods presented. 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 as reported in our consolidated statements of operations. Our cloud software and on-premise software 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.

[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 IT 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.