010000 - Document - Document and Entity Information {Elements}
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020102 - Disclosure - Risk/Return Detail Data (MFS Active Core Plus Bond ETF) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020104 - Disclosure - Risk/Return Detail Data (MFS Active Growth ETF) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020106 - Disclosure - Risk/Return Detail Data (MFS Active Intermediate Muni Bond ETF) {Elements}
link:presentationLink
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020101 - Schedule - Risk Table {Transposed}
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020108 - Disclosure - Risk/Return Detail Data (MFS Active International ETF) {Elements}
link:presentationLink
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020101 - Schedule - Risk Table {Transposed}
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020110 - Disclosure - Risk/Return Detail Data (MFS Active Mid Cap ETF) {Elements}
link:presentationLink
link:calculationLink
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020101 - Schedule - Risk Table {Transposed}
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020112 - Disclosure - Risk/Return Detail Data (MFS Active Value ETF) {Elements}
link:presentationLink
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020101 - Schedule - Risk Table {Transposed}
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020114 - Disclosure - Risk/Return Detail Data (MFS Blended Research Core Equity ETF) {Elements}
link:presentationLink
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020101 - Schedule - Risk Table {Transposed}
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020116 - Disclosure - Risk/Return Detail Data (MFS Blended Research Emerging Markets Equity ETF) {Elements}
link:presentationLink
link:calculationLink
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020101 - Schedule - Risk Table {Transposed}
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link:definitionLink
020118 - Disclosure - Risk/Return Detail Data (MFS Blended Research International Equity ETF) {Elements}
link:presentationLink
link:calculationLink
link:definitionLink
020101 - Schedule - Risk Table {Transposed}
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010004 - Schedule - Investment Risks {Unlabeled}
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