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Commitments, Contingencies and Guarantees (Details) € in Millions, $ in Millions | Dec. 31, 2017 USD ($) | Dec. 31, 2017 EUR (€) | Dec. 31, 2015 USD ($) | Dec. 31, 2015 EUR (€)
--- | --- | --- | --- | ---
Litigation |  |  |  |
Amount of fine | $ 3.9 | € 3.3 | $ 5.4 | € 5.0

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Amount of fines from regulatory agencies. + References No definition available. + Details
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Namespace Prefix: | virt_
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Balance Type: | debit
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