Deferred Revenue and Commissions - Remaining Performance Obligation (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Aug. 01, 2021	Aug. 02, 2020	Aug. 01, 2021	Aug. 02, 2020
Revenue from Contract with Customer [Abstract]
Deferred revenue recognized	$ 155,300	$ 119,400	$ 258,600	$ 204,600
Contracted but not recognized revenue	$ 1,196,000		$ 1,196,000
Contracted but not recognized revenue expected to be recognized in the next 12 months (percent)	45.00%		45.00%

Revenue, Remaining Performance Obligation, Percentage Recognized in Net 12 Months

No definition available.

Name:	pstg_RevenueRemainingPerformanceObligationPercentageRecognizedInNet12Months
Namespace Prefix:	pstg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

+ Details

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

- References

No definition available.

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

+ Details

Name:	us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant