Document and Entity Information - shares	3 Months Ended
	Apr. 30, 2019	May 31, 2019
Document And Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	VEEV
Entity Registrant Name	VEEVA SYSTEMS INC
Entity Central Index Key	0001393052
Current Fiscal Year End Date	--01-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Class A common stock [Member]
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		130,074,233
Class B common stock [Member]
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		17,191,374