Capital Structure - Employee Exchanges (Details)	12 Months Ended
	Dec. 31, 2021 shares	Dec. 31, 2020 shares	Dec. 31, 2019 shares
Virtu Financial
Class of Stock [Line Items]
Ownership interest	62.70%
VFH
Class of Stock [Line Items]
Common stock exchange ratio	1
VFH | Class A common stock
Class of Stock [Line Items]
Issuance of common stock in connection with employee exchanges (in shares)	747,849	2,660,239	840,839