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Acquisitions - Summary of Weighted Average Amortization Periods Over Straight-Line Basis (Details)	12 Months Ended
	Jan. 31, 2019
Trade names
Acquired Finite Lived Intangible Assets [Line Items]
Weighted average amortization periods	10 years
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Weighted average amortization periods	7 years
Other
Acquired Finite Lived Intangible Assets [Line Items]
Weighted average amortization periods	7 years

X

- Definition

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.

+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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