Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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-Section 55
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-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=virt_SwinglineSubfacilityMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=virt_SeniorSecuredFirstLienTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=virt_InvestmentTechnologyGroupInc.Member
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Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_LongtermDebtTypeAxis=virt_VFHParentLLCMember
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ITG Acquisition - Background (Details) - USD ($)	Oct. 09, 2019	Mar. 01, 2019
Committed facility
Business Acquisition [Line Items]
Maximum borrowing capacity		$ 50,000,000.0
Letter of credit
Business Acquisition [Line Items]
Maximum borrowing capacity		5,000,000.0
Swingline subfacility
Business Acquisition [Line Items]
Maximum borrowing capacity		5,000,000.0
First lien term loan
Business Acquisition [Line Items]
Face amount		1,500,000,000.0
Proceeds from borrowings		404,500,000
First lien term loan \| ITG
Business Acquisition [Line Items]
Proceeds from borrowings		$ 1,095,000,000.0
VFH \| First Lien Term Loan Facility
Business Acquisition [Line Items]
Proceeds from borrowings	$ 525,000,000.0