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Business and Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - USD ($) | 12 Months Ended
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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% |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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