Income Taxes (Details 11) - USD ($) $ in Millions	May 31, 2016	May 31, 2015
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits That Would Impact Effective Tax Rate	$ 45	$ 31
Unrecognized Tax Benefits Accrued Income Tax Penalties And Interest	$ 11	$ 19

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant