Income Taxes - Available Domestic and Foreign Loss Carryforwards (Detail) $ in Millions	May. 31, 2015 USD ($)
Operating Loss Carryforwards [Line Items]
2016	$ 0
2017	0
2018	4
2019	1
2020-2035	17
Indefinite	14
Net Operating Losses	$ 36

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

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