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Borrowings - Broker-Dealer Credit Facilities (Details)
 6 Months Ended
Jun. 30, 2024
USD ($)
instrument
base
Line of Credit Facility [Line Items]  
Number of borrowing bases | base 2
Commitment fee (as a percent) 0.50%
Broker-dealer credit facilities  
Line of Credit Facility [Line Items]  
Number of secured credit facilities | instrument 2
Maximum borrowing capacity $ 650,000,000
Commitment fee (as a percent) 0.50%
Broker-dealer credit facilities | Borrowing Base A Loan  
Line of Credit Facility [Line Items]  
Maximum borrowing capacity $ 650,000,000
Interest rate margin (as a percent) 1.25%
Broker-dealer credit facilities | Borrowing Base B Loan  
Line of Credit Facility [Line Items]  
Maximum borrowing capacity $ 300,000,000
Interest rate margin (as a percent) 2.50%
Broker-dealer credit facilities | Virtu Financial Singapore Pte. Ltd.  
Line of Credit Facility [Line Items]  
Maximum borrowing capacity $ 10,000,000
Interest rate margin (as a percent) 3.50%
Broker-dealer credit facility on an uncommitted basis  
Line of Credit Facility [Line Items]  
Number of secured credit facilities | instrument 1
Maximum borrowing capacity $ 400,000,000