Document and Entity Information - shares	3 Months Ended
	Apr. 30, 2017	May 31, 2017
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2017
Document Fiscal Year Focus	2017
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	Large Accelerated Filer
Class A
Entity Common Stock, Shares Outstanding		93,938,912
Class B
Entity Common Stock, Shares Outstanding		114,766,953