Derivative Financial Instruments (Details) (Not designated as hedging instruments, USD $) In Millions, unless otherwise specified	Aug. 31, 2014
Foreign Exchange Forward To Buy Canadian Currency
Derivative [Line Items]
Derivative, Notional Amount	$ 22
Foreign Exchange Forward to Sell Canadian Currency
Derivative [Line Items]
Derivative, Notional Amount	$ 6

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant