Related Party Transactions - Narrative (Details) - Affiliated Entity - Other Related Parties - USD ($) $ in Millions	12 Months Ended
Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Revenue from Affiliated Companies
Related Party Transaction [Line Items]
Revenue from related party	$ 16.2	$ 21.2	$ 19.6
Accounts Receivable from Affiliated Companies
Related Party Transaction [Line Items]
Accounts receivable related party	$ 1.2	$ 2.5

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant