Revenues, Accounts Receivable, Deferred Revenue and Remaining Performance Obligations - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Disaggregation of Revenue
Total revenues	$ 558,572	$ 626,336	$ 1,484,307	$ 1,567,744
License
Disaggregation of Revenue
Total revenues	240,225	373,684	565,424	855,825
Cloud services
Disaggregation of Revenue
Total revenues	144,714	80,439	382,736	212,946
Maintenance, professional services and training
Disaggregation of Revenue
Total revenues	$ 173,633	$ 172,213	$ 536,147	$ 498,973

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