Financial Instruments - Cash Equivalents, Marketable Securities and Restricted Cash (Details) - USD ($) $ in Thousands	Nov. 02, 2025	Feb. 02, 2025
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	$ 674,959
Fair Value	678,775
Cash Equivalents	216,673	$ 286,413
Marketable Securities	678,775	798,237
Restricted Cash	11,465	5,317
Amortized Cost	701,589	823,136
Total gross unrealized gains	3,872	2,972
Total gross unrealized losses	(56)	(208)
Total fair value	906,913	1,089,967
Level 1 \| Money market accounts
Debt Securities, Available-for-Sale [Abstract]
Fair Value	201,508	264,067
Cash Equivalents	190,043	258,750
Marketable Securities	0	0
Restricted Cash	11,465	5,317
Level 2 \| U.S. government treasury notes
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	297,006	360,578
Gross Unrealized Gains	1,042	735
Gross Unrealized Losses	(35)	(146)
Fair Value	298,013	361,167
Cash Equivalents	26,630	27,663
Marketable Securities	271,383	333,504
Restricted Cash	0	0
Level 2 \| U.S. government agencies
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	9,202	1,400
Gross Unrealized Gains	86	0
Gross Unrealized Losses	(1)	0
Fair Value	9,287	1,400
Cash Equivalents	0	0
Marketable Securities	9,287	1,400
Restricted Cash	0	0
Level 2 \| Corporate debt securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	334,025	395,532
Gross Unrealized Gains	2,425	1,903
Gross Unrealized Losses	(4)	(55)
Fair Value	336,446	397,380
Cash Equivalents	0	0
Marketable Securities	336,446	397,380
Restricted Cash	0	0
Level 2 \| Foreign government bonds
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	5,072	700
Gross Unrealized Gains	3	3
Gross Unrealized Losses	(1)	0
Fair Value	5,074	703
Cash Equivalents	0	0
Marketable Securities	5,074	703
Restricted Cash	0	0
Level 2 \| Asset-backed securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	45,265	64,926
Gross Unrealized Gains	310	331
Gross Unrealized Losses	(2)	(7)
Fair Value	45,573	65,250
Cash Equivalents	0	0
Marketable Securities	45,573	65,250
Restricted Cash	0	$ 0
Level 2 \| Municipal bonds
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	11,019
Gross Unrealized Gains	6
Gross Unrealized Losses	(13)
Fair Value	11,012
Cash Equivalents	0
Marketable Securities	11,012
Restricted Cash	$ 0

Debt Securities, Available-for-sale, Equity Securities, Cash Equivalents And Restricted Cash

No definition available.

Name:	pstg_DebtSecuritiesAvailableForSaleEquitySecuritiesCashEquivalentsAndRestrictedCash
Namespace Prefix:	pstg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Securities, Available-for-sale, Equity Securities, Cash Equivalents And Restricted Cash, Accumulated Gross Unrealized Gain, Before Tax

+ References

No definition available.

+ Details

Name:	pstg_DebtSecuritiesAvailableForSaleEquitySecuritiesCashEquivalentsAndRestrictedCashAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	pstg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Securities, Available-for-sale, Equity Securities, Cash Equivalents And Restricted Cash, Accumulated Gross Unrealized Loss, Before Tax

+ References

No definition available.

+ Details

Name:	pstg_DebtSecuritiesAvailableForSaleEquitySecuritiesCashEquivalentsAndRestrictedCashAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	pstg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Securities, Available-for-sale, Cash Equivalents And Restricted Cash, Amortized Cost

+ References

No definition available.

+ Details

Name:	pstg_DebtSecuritiesAvailableforsaleCashEquivalentsAndRestrictedCashAmortizedCost
Namespace Prefix:	pstg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

+ Details

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

- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

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

- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

+ Details

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

- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

+ References

+ Details

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

- Definition

Amount of cash and cash equivalent restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-8

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-SubTopic 210
-Topic 954
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477220/954-210-45-5

+ Details

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

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: