Document and Entity Information - shares	3 Months Ended
	Apr. 30, 2016	May. 31, 2016
Document And Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
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
Class A Common Stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		69,104,013
Class B Common Stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		125,307,519