Cover Page - shares	6 Months Ended
	Jul. 31, 2019	Aug. 31, 2019
Document And Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 31, 2019
Document Transition Report	false
Entity File Number	001-36121
Entity Registrant Name	Veeva Systems Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-8235463
Entity Address, City or Town	Pleasanton
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94588
Entity Address, Address Line One	4280 Hacienda Drive
City Area Code	925
Local Phone Number	452-6500
Title of 12(b) Security	Class A Common Stock,par value $0.00001 per share
Trading Symbol	VEEV
Security Exchange Name	NYSE
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
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001393052
Current Fiscal Year End Date	--01-31
Class A common stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		131,555,292
Class B common stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		16,429,631