Debt - Long-term Debt and Capital Lease Obligations Current and Non Current (Parenthetical) (Detail) (Secured Debt [Member])	Aug. 31, 2013
Secured Debt [Member]
Debt Instrument [Line Items]
Secured credit agreements - weighted average interest rate (in percentage)	3.18%

Weighted average interest rate of debt outstanding.

No definition available.

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant