v3.25.2
Shareholder Report, Line Graph (Details) - USD ($)
12 Months Ended 24 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 120 Months Ended
Jul. 31, 2025
Jul. 31, 2025
Jul. 31, 2025
Jul. 31, 2025
Jul. 31, 2025
Jul. 31, 2025
C000209803_0_LG_BBIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Dow Jones U.S. Total Stock Market Index℠</span>  
C000209803_0_BBIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value $ 10,000          
C000209803_0_BBIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,689          
C000209803_0_BBIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,843          
C000209803_0_BBIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,453          
C000209803_0_BBIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,173          
C000209803_0_BBIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 17,088          
C000209803_0_BBIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 20,694          
C000227888_LG_ClassMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Women's Leadership ETF</span>      
C000227888_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227888_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,253          
C000227888_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,803          
C000227888_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 9,945          
C000227888_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,519          
C000227888_LG_1_AdditionalIndexMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI USA Women's Leadership Index</span>      
C000227888_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227888_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,293          
C000227888_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,844          
C000227888_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 9,658          
C000227888_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,748          
C000227888_LG_2_AdditionalIndexMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span>      
C000227888_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227888_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,297          
C000227888_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,540          
C000227888_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,746          
C000227888_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,011          
C000171935_LG_ClassMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Value Factor ETF</span>
C000171935_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171935_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,866          
C000171935_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,777          
C000171935_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,322          
C000171935_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 14,769          
C000171935_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,055          
C000171935_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,241          
C000171935_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 22,736          
C000171935_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 26,698          
C000171935_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 29,826          
C000171935_LG_1_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Value Factor Index℠</span>
C000171935_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171935_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,901          
C000171935_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,865          
C000171935_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,454          
C000171935_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 14,942          
C000171935_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,371          
C000171935_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,600          
C000171935_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,204          
C000171935_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 27,287          
C000171935_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 30,531          
C000171935_LG_2_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>
C000171935_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171935_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,635          
C000171935_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,519          
C000171935_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,600          
C000171935_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 16,357          
C000171935_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 22,568          
C000171935_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 21,017          
C000171935_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,739          
C000171935_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 28,843          
C000171935_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 33,613          
C000218700_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® U.S. Multifactor ETF</span>    
C000218700_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218700_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,994          
C000218700_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,651          
C000218700_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,015          
C000218700_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 17,303          
C000218700_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,579          
C000218700_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Multifactor Index℠</span>    
C000218700_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218700_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,032          
C000218700_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,726          
C000218700_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,143          
C000218700_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 17,465          
C000218700_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,793          
C000218700_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>    
C000218700_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218700_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,219          
C000218700_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,310          
C000218700_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,904          
C000218700_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,894          
C000218700_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,688          
C000227887_LG_ClassMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Sustainable U.S. Equity ETF</span>      
C000227887_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227887_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,399          
C000227887_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,670          
C000227887_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,048          
C000227887_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,384          
C000227887_LG_1_AdditionalIndexMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI USA IMI ESG Leaders Index</span>      
C000227887_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227887_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,375          
C000227887_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,716          
C000227887_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,983          
C000227887_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,460          
C000227887_LG_2_AdditionalIndexMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span>      
C000227887_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227887_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,297          
C000227887_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,540          
C000227887_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,746          
C000227887_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,011          
C000215140_LG_ClassMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Stocks for Inflation ETF</span>  
C000215140_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000215140_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,812          
C000215140_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,930          
C000215140_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,580          
C000215140_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,635          
C000215140_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,380          
C000215140_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 21,224          
C000215140_LG_1_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Stocks for Inflation Factor Index℠</span>  
C000215140_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000215140_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,844          
C000215140_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,016          
C000215140_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,712          
C000215140_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,821          
C000215140_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,629          
C000215140_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 21,551          
C000215140_LG_2_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>  
C000215140_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000215140_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,850          
C000215140_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,969          
C000215140_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,941          
C000215140_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,746          
C000215140_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 19,132          
C000215140_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,296          
C000209803_LG_ClassMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Small-Mid Multifactor ETF</span>  
C000209803_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000209803_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,335          
C000209803_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 9,829          
C000209803_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,174          
C000209803_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,841          
C000209803_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,937          
C000209803_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 17,791          
C000209803_LG_1_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Small-Mid Multifactor Index℠</span>  
C000209803_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000209803_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,350          
C000209803_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 9,866          
C000209803_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,281          
C000209803_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,993          
C000209803_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,144          
C000209803_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 18,079          
C000209803_LG_2_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Dow Jones U.S. Completion Total Stock Market Index℠</span>  
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Accumulated Value 16,466          
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Account Value [Line Items]            
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Account Value [Line Items]            
Accumulated Value 14,212          
C000209803_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,338          
C000223347_LG_ClassMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Fundamental Small-Mid Cap ETF</span>      
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Account Value [Line Items]            
Accumulated Value 10,534          
C000223347_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
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C000223347_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
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Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 2500™ Index</span>      
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Account Value [Line Items]            
Accumulated Value 10,000          
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Account Value [Line Items]            
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Account Value [Line Items]            
Accumulated Value 9,607          
C000223347_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,380          
C000223347_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span>      
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Account Value [Line Items]            
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Account Value [Line Items]            
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Account Value [Line Items]            
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C000223347_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,893          
C000223347_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000223346_LG_ClassMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Real Estate Investment ETF</span>      
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Account Value [Line Items]            
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Account Value [Line Items]            
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C000223346_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,086          
C000223346_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
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C000223346_LG_1_AdditionalIndexMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI US IMI Real Estate 25/50 Index</span>      
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Account Value [Line Items]            
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Account Value [Line Items]            
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Account Value [Line Items]            
Accumulated Value 10,663          
C000223346_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
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Account Value [Line Items]            
Accumulated Value 12,469          
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Account Value [Line Items]            
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C000171934_LG_ClassMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Quality Factor ETF</span>
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Account Value [Line Items]            
Accumulated Value 27,615          
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C000171934_LG_1_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Quality Factor Index℠</span>
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Account Value [Line Items]            
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C000171934_1_AdditionalIndexMember_AsOf_2020Member            
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Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>
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Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Fundamental Large Cap Core ETF</span>    
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Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>    
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Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Momentum Factor ETF</span>
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C000171933_ClassMember_AsOf_2020Member            
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Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Momentum Factor Index℠</span>
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Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>
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Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
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Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Low Volatility Factor ETF</span>
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C000171932_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 20,851          
C000171932_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,618          
C000171932_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 22,465          
C000171932_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 26,124          
C000171932_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 28,578          
C000171932_LG_1_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Low Volatility Factor Index℠</span>
C000171932_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171932_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,330          
C000171932_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,289          
C000171932_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 15,181          
C000171932_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 16,329          
C000171932_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,107          
C000171932_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,933          
C000171932_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 22,873          
C000171932_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 26,642          
C000171932_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 29,187          
C000171932_LG_2_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>
C000171932_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171932_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,635          
C000171932_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,519          
C000171932_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,600          
C000171932_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 16,357          
C000171932_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 22,568          
C000171932_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 21,017          
C000171932_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,739          
C000171932_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 28,843          
C000171932_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 33,613          
C000171930_LG_ClassMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® High Dividend ETF</span>
C000171930_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171930_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,961          
C000171930_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,739          
C000171930_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,269          
C000171930_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,667          
C000171930_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,040          
C000171930_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,839          
C000171930_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 21,140          
C000171930_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 25,581          
C000171930_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
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C000171930_LG_1_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity High Dividend Index℠</span>
C000171930_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171930_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,996          
C000171930_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,826          
C000171930_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,410          
C000171930_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,818          
C000171930_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,315          
C000171930_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,188          
C000171930_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 21,596          
C000171930_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 26,186          
C000171930_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 29,834          
C000171930_LG_2_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>
C000171930_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171930_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,635          
C000171930_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,519          
C000171930_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,600          
C000171930_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 16,357          
C000171930_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 22,568          
C000171930_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 21,017          
C000171930_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,739          
C000171930_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 28,843          
C000171930_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000223344_LG_ClassMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Fundamental Large Cap Growth ETF</span>      
C000223344_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000223344_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
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C000223344_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,245          
C000223344_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 8,970          
C000223344_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
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C000223344_LG_1_AdditionalIndexMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Growth Index</span>      
C000223344_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000223344_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
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C000223344_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,984          
C000223344_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,712          
C000223344_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,866          
C000223344_LG_2_AdditionalIndexMember_5YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>      
C000223344_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000223344_2_AdditionalIndexMember_AsOf_2022Member            
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C000223344_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
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C000223344_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,066          
C000223344_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000171931_LG_ClassMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Dividend ETF for Rising Rates</span>
C000171931_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171931_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,485          
C000171931_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,098          
C000171931_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,896          
C000171931_ClassMember_AsOf_2020Member            
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Accumulated Value 14,154          
C000171931_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 19,471          
C000171931_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,264          
C000171931_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 20,838          
C000171931_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,558          
C000171931_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 28,239          
C000171931_LG_1_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Dividend Index for Rising Rates℠</span>
C000171931_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
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C000171931_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
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C000171931_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,195          
C000171931_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,045          
C000171931_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 14,341          
C000171931_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 19,793          
C000171931_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,650          
C000171931_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 21,314          
C000171931_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 25,156          
C000171931_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 28,972          
C000171931_LG_2_AdditionalIndexMember_10YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>
C000171931_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000171931_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,635          
C000171931_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,519          
C000171931_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,600          
C000171931_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 16,357          
C000171931_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 22,568          
C000171931_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
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C000171931_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,739          
C000171931_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 28,843          
C000171931_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000218331_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Blue Chip Value ETF</span>    
C000218331_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218331_ClassMember_AsOf_2021Member            
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Accumulated Value 10,123          
C000218331_ClassMember_AsOf_2022Member            
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Accumulated Value 14,459          
C000218331_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,642          
C000218331_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,426          
C000218331_ClassMember_AsOf_2025Member            
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C000218331_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Value Index</span>    
C000218331_1_AdditionalIndexMember_AsOf_2020Member            
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Accumulated Value 10,000          
C000218331_1_AdditionalIndexMember_AsOf_2021Member            
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C000218331_1_AdditionalIndexMember_AsOf_2022Member            
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Accumulated Value 14,169          
C000218331_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,967          
C000218331_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,124          
C000218331_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000218331_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>    
C000218331_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218331_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
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C000218331_2_AdditionalIndexMember_AsOf_2022Member            
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C000218331_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,719          
C000218331_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,496          
C000218331_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000218329_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Blue Chip Growth ETF</span>    
C000218329_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218329_ClassMember_AsOf_2021Member            
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Accumulated Value 11,368          
C000218329_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,387          
C000218329_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,467          
C000218329_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,639          
C000218329_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
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C000218329_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Growth Index</span>    
C000218329_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218329_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,108          
C000218329_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,182          
C000218329_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,371          
C000218329_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,685          
C000218329_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,910          
C000218329_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>    
C000218329_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000218329_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,678          
C000218329_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,731          
C000218329_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,719          
C000218329_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,496          
C000218329_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 18,828          
C000248142_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Fundamental Large Cap Value ETF</span>        
C000248142_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,023          
C000248142_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,678          
C000248142_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Value Index</span>        
C000248142_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,056          
C000248142_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,858          
C000248142_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 1000® Index</span>        
C000248142_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,032          
C000248142_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value $ 10,879