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Segment and Geographic Information - Additional Information (Details)	12 Months Ended
	Jan. 31, 2019 Segment Location	Jan. 31, 2018	Jan. 31, 2017
Segment Reporting Information [Line Items]
Number of operating segments | Segment	2
Number of geographic locations | Location	2
Geographic Concentration Risk | Europe | Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	31.60%	32.10%	23.10%
Geographic Concentration Risk | Americas (excluding the United States) | Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	8.80%	9.20%	8.90%
Geographic Concentration Risk | Middle East | Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	7.70%	7.70%	8.10%
Geographic Concentration Risk | Asia | Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	6.50%	5.10%	6.30%

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- Definition

Number of geographic locations in which entity operates.

+ References

No definition available.

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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