Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Sep. 30, 2018
Registrant Name	dei_EntityRegistrantName	VIRTUS OPPORTUNITIES TRUST
Central Index Key	dei_EntityCentralIndexKey	0001005020
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Jan. 28, 2019
Document Effective Date	dei_DocumentEffectiveDate	Jan. 28, 2019
Prospectus Date	rr_ProspectusDate	Jan. 28, 2019
Virtus Duff & Phelps Global Infrastructure Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PGUAX
Virtus Duff & Phelps Global Infrastructure Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PGUCX
Virtus Duff & Phelps Global Infrastructure Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PGIUX
Virtus Duff & Phelps Global Infrastructure Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VGIRX
Virtus Duff & Phelps Global Real Estate Securities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VGSAX
Virtus Duff & Phelps Global Real Estate Securities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VGSCX
Virtus Duff & Phelps Global Real Estate Securities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VGISX
Virtus Duff & Phelps Global Real Estate Securities Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VRGEX
Virtus Duff & Phelps International Real Estate Securities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PXRAX
Virtus Duff & Phelps International Real Estate Securities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PXRCX
Virtus Duff & Phelps International Real Estate Securities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PXRIX
Virtus Duff & Phelps Real Estate Securities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHRAX
Virtus Duff & Phelps Real Estate Securities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHRCX
Virtus Duff & Phelps Real Estate Securities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHRIX
Virtus Duff & Phelps Real Estate Securities Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VRREX
Virtus Herzfeld Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VHFAX
Virtus Herzfeld Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VHFCX
Virtus Herzfeld Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VHFIX
Virtus Horizon Wealth Masters Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VWMAX
Virtus Horizon Wealth Masters Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VWMCX
Virtus Horizon Wealth Masters Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VWMIX
Virtus KAR Emerging Markets Small-Cap Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VAESX
Virtus KAR Emerging Markets Small-Cap Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VCESX
Virtus KAR Emerging Markets Small-Cap Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VIESX
Virtus KAR International Small-Cap Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VISAX
Virtus KAR International Small-Cap Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VCISX
Virtus KAR International Small-Cap Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VIISX
Virtus KAR International Small-Cap Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VRISX
Virtus Newfleet Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	SAVAX
Virtus Newfleet Bond Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	SAVCX
Virtus Newfleet Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	SAVYX
Virtus Newfleet Bond Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VBFRX
Virtus Newfleet CA Tax-Exempt Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	CTESX
Virtus Newfleet CA Tax-Exempt Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	CTXEX
Virtus Newfleet High Yield Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHCHX
Virtus Newfleet High Yield Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PGHCX
Virtus Newfleet High Yield Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHCIX
Virtus Newfleet High Yield Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VRHYX
Virtus Newfleet Low Duration Income Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	HIMZX
Virtus Newfleet Low Duration Income Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCMZX
Virtus Newfleet Low Duration Income Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	HIBIX
Virtus Newfleet Low Duration Income Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VLDRX
Virtus Newfleet Multi-Sector Intermediate Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	NAMFX
Virtus Newfleet Multi-Sector Intermediate Bond Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	NCMFX
Virtus Newfleet Multi-Sector Intermediate Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VMFIX
Virtus Newfleet Multi-Sector Intermediate Bond Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VMFRX
Virtus Newfleet Multi-Sector Short Term Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	NARAX
Virtus Newfleet Multi-Sector Short Term Bond Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PSTCX
Virtus Newfleet Multi-Sector Short Term Bond Fund | Class C1
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PMSTX
Virtus Newfleet Multi-Sector Short Term Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PIMSX
Virtus Newfleet Multi-Sector Short Term Bond Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VMSSX
Virtus Newfleet Senior Floating Rate Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PSFRX
Virtus Newfleet Senior Floating Rate Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PFSRX
Virtus Newfleet Senior Floating Rate Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PSFIX
Virtus Newfleet Senior Floating Rate Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VRSFX
Virtus Newfleet Tax-Exempt Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	HXBZX
Virtus Newfleet Tax-Exempt Bond Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PXCZX
Virtus Newfleet Tax-Exempt Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	HXBIX
Virtus Rampart Alternatives Diversifier Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PDPAX
Virtus Rampart Alternatives Diversifier Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PDPCX
Virtus Rampart Alternatives Diversifier Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VADIX
Virtus Rampart Equity Trend Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VAPAX
Virtus Rampart Equity Trend Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VAPCX
Virtus Rampart Equity Trend Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VAPIX
Virtus Rampart Equity Trend Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VRPAX
Virtus Rampart Multi-Asset Trend Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VAAAX
Virtus Rampart Multi-Asset Trend Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VAACX
Virtus Rampart Multi-Asset Trend Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VAISX
Virtus Rampart Sector Trend Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWBAX
Virtus Rampart Sector Trend Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWBCX
Virtus Rampart Sector Trend Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VARIX
Virtus Vontobel Emerging Markets Opportunities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	HEMZX
Virtus Vontobel Emerging Markets Opportunities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PICEX
Virtus Vontobel Emerging Markets Opportunities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	HIEMX
Virtus Vontobel Emerging Markets Opportunities Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VREMX
Virtus Vontobel Foreign Opportunities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	JVIAX
Virtus Vontobel Foreign Opportunities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	JVICX
Virtus Vontobel Foreign Opportunities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	JVXIX
Virtus Vontobel Foreign Opportunities Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VFOPX
Virtus Vontobel Global Opportunities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	NWWOX
Virtus Vontobel Global Opportunities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	WWOCX
Virtus Vontobel Global Opportunities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	WWOIX
Virtus Vontobel Global Opportunities Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VRGOX
Virtus Vontobel Greater European Opportunities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VGEAX
Virtus Vontobel Greater European Opportunities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VGECX
Virtus Vontobel Greater European Opportunities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VGEIX