Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Nov. 06, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-37352
Entity Registrant Name	Virtu Financial, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	32-0420206
Entity Address, Address Line One	One Liberty Plaza
Entity Address, Address Line Two	165 Broadway
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10006
City Area Code	212
Local Phone Number	418-0100
Title of 12(b) Security	Class A common stock, par value $0.00001 per share
Trading Symbol	VIRT
Security Exchange Name	NASDAQ
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
Entity Central Index Key	0001592386
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Class A common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		122,918,976
Class C common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		10,466,939
Class D common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		60,091,740