Document and Entity Information - shares	9 Months Ended
	Oct. 31, 2016	Dec. 06, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
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
Entity Common Stock, Shares Outstanding		82,493,782
Class B Common Stock
Entity Common Stock, Shares Outstanding		117,381,478