Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Mar. 13, 2018	Jun. 30, 2017
Entity Registrant Name	Virtu Financial, Inc.
Entity Central Index Key	0001592386
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 699.7
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Class A
Entity Common Stock, Shares Outstanding		91,512,582
Class C
Entity Common Stock, Shares Outstanding		17,066,564
Class D
Entity Common Stock, Shares Outstanding		79,610,490