Business and Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - USD ($)	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Concentration Risk [Line Items]
Maximum borrowing capacity	$ 400,000,000
Tech Data | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk, percentage	25.00%	25.00%	24.00%
Tech Data | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	22.00%	22.00%
United States
Concentration Risk [Line Items]
Concentration risk, percentage	26.00%	19.00%
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	50.00%	56.00%
Asia Pacific (“APAC”)
Concentration Risk [Line Items]
Concentration risk, percentage	23.00%	24.00%