Estimated Useful Lives (Detail)	12 Months Ended
	Jan. 31, 2015
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets	50 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets	10 years
Furniture, Fixtures and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets	10 years
Furniture, Fixtures and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets	3 years
Computer Software, Intangible Asset [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets	7 years
Computer Software, Intangible Asset [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets	2 years