Revenues, Accounts Receivable, Deferred Revenue and Remaining Performance Obligations - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Disaggregation of Revenue
Total revenues	$ 491,658	$ 516,558	$ 925,735	$ 941,408
License
Disaggregation of Revenue
Total revenues	176,814	279,279	325,199	482,141
Cloud services
Disaggregation of Revenue
Total revenues	125,870	70,451	238,022	132,506
Maintenance, professional services and training
Disaggregation of Revenue
Total revenues	$ 188,974	$ 166,828	$ 362,514	$ 326,761

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration