Business Operations - Additional Information (Detail)	Jan. 31, 2015 Country Store
Nature Of Operations [Line Items]
Number of retail stores	1,000us-gaap_NumberOfStores
Number of countries company operates in	81

The number of countries in which the entity operates as of balance sheet date.

No definition available.

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant