Business and Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Concentration Risk [Line Items]
Maximum borrowing capacity	$ 400,000,000
Tech Data | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk, percentage	30.00%	25.00%	25.00%
Tech Data | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	20.00%	22.00%
United States
Concentration Risk [Line Items]
Concentration risk, percentage	9.00%	26.00%
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	80.00%	50.00%
Asia Pacific (“APAC”)
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	23.00%