Document and Entity Information	Total
Prospectus:
Document Type	485BPOS
Document Period End Date	Jun. 21, 2021
Entity Registrant Name	Virtus Opportunities Trust
Entity Central Index Key	0001005020
Entity Inv Company Type	N-1A
Amendment Flag	false
Document Creation Date	Jun. 21, 2021
Document Effective Date	Jun. 21, 2021
Prospectus Date	Jun. 21, 2021
Virtus KAR Developing Markets Fund \| Class C
Prospectus:
Trading Symbol	VDMCX
Virtus KAR Developing Markets Fund \| Class I
Prospectus:
Trading Symbol	VIDMX
Virtus KAR Developing Markets Fund \| Class R6
Prospectus:
Trading Symbol	VDMRX
Virtus KAR Developing Markets Fund \| Class A
Prospectus:
Trading Symbol	VDMAX

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The date the document was made available and submitted, in YYYY-MM-DD format. The date of submission, date of acceptance by the recipient, and the document effective date are all potentially different.

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The date when a document, upon receipt and acceptance, becomes officially effective, in YYYY-MM-DD format. Usually it is a system-assigned date time value, but it may be declared by the submitter in some cases.

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The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Trading symbol of an instrument as listed on an exchange.

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The date of the prospectus.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Prospectus Table.

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