SEGMENT INFORMATION (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2017	May 31, 2016	May 31, 2015
Segment reporting information [Line Items]
Revenues		$ 37,728	$ 37,047	$ 38,226
Sales and marketing expenses	[1]	8,197	7,884	7,655
Margin		23,017	22,410	23,709
Total for operating segments [Member]
Segment reporting information [Line Items]
Revenues	[2]	37,899	37,057	38,253
Expenses		14,882	14,647	14,544
Margin	[3]	23,017	22,410	23,709
Total for operating segments [Member] | Cloud and on-premise software [Member]
Segment reporting information [Line Items]
Revenues	[2]	30,389	28,997	29,491
Cloud SaaS, PaaS and IaaS expenses		1,901	1,468	1,072
Software license updates and product support expenses		984	1,077	1,130
Sales and marketing expenses		6,886	6,570	6,398
Margin	[3]	20,618	19,882	20,891
Total for operating segments [Member] | Hardware [Member]
Segment reporting information [Line Items]
Revenues	[2]	4,152	4,669	5,209
Hardware products and support expenses		1,623	2,031	2,249
Sales and marketing expenses		820	867	885
Margin	[3]	1,709	1,771	2,075
Total for operating segments [Member] | Services [Member]
Segment reporting information [Line Items]
Revenues		3,358	3,391	3,553
Services expenses		2,668	2,634	2,810
Margin	[3]	$ 690	$ 757	$ 743

[1] Exclusive of amortization of intangible assets, which is shown separately

[2] Cloud and on-premise software and hardware revenues for management reporting included revenues related to cloud, 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 due to business combination accounting requirements. 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.

[3] The margins reported reflect only the direct controllable costs of each line of business and do not include allocations of product development, general and administrative and certain other allocable expenses. Additionally, the margins reported above do not reflect amortization of intangible assets, acquisition related and other expenses, restructuring expenses, stock-based compensation, interest expense or certain other non-operating income, net. Certain fiscal 2016 and fiscal 2015 balances have been reclassified to conform to the current year presentation. Such reclassifications did not affect consolidated revenues or operating income.