Cover - shares	6 Months Ended
	Jul. 31, 2019	Aug. 26, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 31, 2019
Document Transition Report	false
Entity File Number	001-37570
City Area Code	800
Local Phone Number	379-7873
Entity Registrant Name	Pure Storage, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-1069557
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Class A Common Stock, $0.0001 par value per share
Trading Symbol	PSTG
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding (in shares)		256,179,043
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001474432
Current Fiscal Year End Date	--01-31
Entity Address, Address Line One	650 Castro Street, Suite 400
Entity Address, City or Town	Mountain View
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94041