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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Concentration of Credit Risk (Additional Information) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Jan. 31, 2020	Dec. 31, 2018
Concentration Risk [Line Items]
Unsecured revolving credit facility						$ 650,000,000.0
Tech Data \| Net Revenue
Concentration Risk [Line Items]
Concentration risk (in percentage)	37.00%	35.00%	37.00%	35.00%
Tech Data \| Accounts Receivable
Concentration Risk [Line Items]
Concentration risk (in percentage)			22.00%		31.00%
Ingram Micro
Concentration Risk [Line Items]
Concentration risk (in percentage)			10.00%	10.00%
Ingram Micro \| Net Revenue
Concentration Risk [Line Items]
Concentration risk (in percentage)	10.00%	10.00%	10.00%	10.00%