Description of the Business and Summary of Significant Accounting Policies and Practices (Details 5)	12 Months Ended
	Jan. 31, 2015
Purchased intangibles | Minimum
Summary of Significant Accounting Policies
Purchased intangibles, useful life	4 years
Purchased intangibles | Maximum
Summary of Significant Accounting Policies
Purchased intangibles, useful life	20 years
Building and building improvements including properties under capital lease | Minimum
Summary of Significant Accounting Policies
Property and equipment, useful life	10 years
Building and building improvements including properties under capital lease | Maximum
Summary of Significant Accounting Policies
Property and equipment, useful life	33 years
Land improvements
Summary of Significant Accounting Policies
Property and equipment, useful life	5 years
Furniture, fixtures and equipment | Minimum
Summary of Significant Accounting Policies
Property and equipment, useful life	2 years
Furniture, fixtures and equipment | Maximum
Summary of Significant Accounting Policies
Property and equipment, useful life	10 years