Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2016	Mar. 22, 2016
Document And Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Trading Symbol	PSTG
Entity Registrant Name	Pure Storage, Inc.
Entity Central Index Key	0001474432
Current Fiscal Year End Date	--01-31
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$ 1,249
Class A Common Stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		47,780,342
Class B Common Stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		144,330,855