Business Combinations (Details) (USD $) In Millions, unless otherwise specified	May 31, 2012 Mexico acquisition [Member]	May 31, 2013 Poland acquisition [Member]	May 31, 2013 Brazil acquisition [Member]	May 31, 2013 France acquisition [Member]	May 31, 2014 Southern Africa acquisition [Member]
Business Acquisition Cost Of Acquired Entity [Abstract]
Acquisition price	$ 128	$ 54	$ 398	$ 55	$ 36

Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant