Business and Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Concentration Risk [Line Items]
Maximum borrowing capacity	$ 400.0
Tech Data | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk, percentage	24.00%	23.00%	21.00%
Tech Data | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	24.00%	23.00%
United States
Concentration Risk [Line Items]
Concentration risk, percentage	25.00%	29.00%
Other Americas
Concentration Risk [Line Items]
Concentration risk, percentage	1.00%	1.00%
Europe, Middle East and Africa (“EMEA”)
Concentration Risk [Line Items]
Concentration risk, percentage	57.00%	38.00%
Asia Pacific (“APAC”)
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	32.00%