v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
Fidelity Metaverse ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Metaverse ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Metaverse ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Metaverse ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Metaverse ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Metaverse ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Metaverse ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Metaverse ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Metaverse ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Metaverse ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Metaverse ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 53.50%
Fidelity Metaverse ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Metaverse ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Metaverse ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Metaverse ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 38.30%
Fidelity Metaverse ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 74.80%
Fidelity Metaverse ETF | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
Fidelity Metaverse ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Metaverse ETF | France  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Metaverse ETF | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Metaverse ETF | Sweden  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Metaverse ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Metaverse ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Metaverse ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Metaverse ETF | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Metaverse ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Metaverse ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Electric Vehicles and Future Transportation ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Electric Vehicles and Future Transportation ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Electric Vehicles and Future Transportation ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Electric Vehicles and Future Transportation ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Electric Vehicles and Future Transportation ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Electric Vehicles and Future Transportation ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Electric Vehicles and Future Transportation ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Electric Vehicles and Future Transportation ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Electric Vehicles and Future Transportation ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Electric Vehicles and Future Transportation ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Fidelity Electric Vehicles and Future Transportation ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 29.90%
Fidelity Electric Vehicles and Future Transportation ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.60%
Fidelity Electric Vehicles and Future Transportation ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Electric Vehicles and Future Transportation ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
Fidelity Electric Vehicles and Future Transportation ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 38.20%
Fidelity Electric Vehicles and Future Transportation ETF | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Electric Vehicles and Future Transportation ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 26.70%
Fidelity Electric Vehicles and Future Transportation ETF | France  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Electric Vehicles and Future Transportation ETF | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Electric Vehicles and Future Transportation ETF | Sweden  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Electric Vehicles and Future Transportation ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Electric Vehicles and Future Transportation ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Electric Vehicles and Future Transportation ETF | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Electric Vehicles and Future Transportation ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Electric Vehicles and Future Transportation ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity Electric Vehicles and Future Transportation ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Digital Health ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Digital Health ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Digital Health ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Digital Health ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Digital Health ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Digital Health ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Digital Health ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Digital Health ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Digital Health ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Digital Health ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Digital Health ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Digital Health ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 86.90%
Fidelity Digital Health ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Digital Health ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Digital Health ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 62.20%
Fidelity Digital Health ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
Fidelity Digital Health ETF | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Digital Health ETF | Sweden  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Digital Health ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Digital Health ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
Fidelity Digital Health ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Digital Health ETF | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Digital Health ETF | Switzerland  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Digital Health ETF | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Digital Health ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
Fidelity Digital Health ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Crypto Industry and Digital Payments ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Crypto Industry and Digital Payments ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
Fidelity Crypto Industry and Digital Payments ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Crypto Industry and Digital Payments ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Crypto Industry and Digital Payments ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Crypto Industry and Digital Payments ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Crypto Industry and Digital Payments ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Fidelity Crypto Industry and Digital Payments ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Crypto Industry and Digital Payments ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Crypto Industry and Digital Payments ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Crypto Industry and Digital Payments ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 52.00%
Fidelity Crypto Industry and Digital Payments ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 44.70%
Fidelity Crypto Industry and Digital Payments ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Crypto Industry and Digital Payments ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Crypto Industry and Digital Payments ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 69.10%
Fidelity Crypto Industry and Digital Payments ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Crypto Industry and Digital Payments ETF | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Crypto Industry and Digital Payments ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Crypto Industry and Digital Payments ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Crypto Industry and Digital Payments ETF | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Crypto Industry and Digital Payments ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
Fidelity Crypto Industry and Digital Payments ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Crypto Industry and Digital Payments ETF | Israel  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Crypto Industry and Digital Payments ETF | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Crypto Industry and Digital Payments ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity Crypto Industry and Digital Payments ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Cloud Computing ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Cloud Computing ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Cloud Computing ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Cloud Computing ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Cloud Computing ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Cloud Computing ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Cloud Computing ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Fidelity Cloud Computing ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Cloud Computing ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Cloud Computing ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Cloud Computing ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 88.90%
Fidelity Cloud Computing ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Cloud Computing ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Cloud Computing ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Cloud Computing ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.70%
Fidelity Cloud Computing ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Cloud Computing ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Cloud Computing ETF | Israel  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Cloud Computing ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Cloud Computing ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Clean Energy ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Clean Energy ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Clean Energy ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Clean Energy ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Clean Energy ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Clean Energy ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Clean Energy ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Clean Energy ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Clean Energy ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Clean Energy ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Clean Energy ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
Fidelity Clean Energy ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
Fidelity Clean Energy ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Clean Energy ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 46.60%
Fidelity Clean Energy ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 34.00%
Fidelity Clean Energy ETF | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Clean Energy ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
Fidelity Clean Energy ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Clean Energy ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
Fidelity Clean Energy ETF | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Clean Energy ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Clean Energy ETF | Spain  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Clean Energy ETF | New Zealand  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Clean Energy ETF | Portugal  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Clean Energy ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.60%
Fidelity Clean Energy ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Enhanced Large Cap Value ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Fidelity Enhanced Large Cap Value ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Enhanced Large Cap Value ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Enhanced Large Cap Value ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Enhanced Large Cap Value ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Enhanced Large Cap Value ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Enhanced Large Cap Value ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Enhanced Large Cap Value ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Enhanced Large Cap Value ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Enhanced Large Cap Value ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Enhanced Large Cap Value ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
Fidelity Enhanced Large Cap Value ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
Fidelity Enhanced Large Cap Value ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
Fidelity Enhanced Large Cap Value ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Enhanced Large Cap Value ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
Fidelity Enhanced Large Cap Value ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Enhanced Large Cap Value ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Enhanced Large Cap Value ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Enhanced Large Cap Value ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Enhanced Large Cap Value ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Enhanced Large Cap Value ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Enhanced Large Cap Value ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
Fidelity Enhanced Large Cap Value ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Enhanced Large Cap Value ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Large Cap Value ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Enhanced Large Cap Value ETF | Puerto Rico  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Enhanced Large Cap Value ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.60%
Fidelity Enhanced Large Cap Value ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Enhanced International ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Enhanced International ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Enhanced International ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Enhanced International ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Enhanced International ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Enhanced International ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Enhanced International ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Enhanced International ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Enhanced International ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Enhanced International ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Enhanced International ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 25.00%
Fidelity Enhanced International ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Enhanced International ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
Fidelity Enhanced International ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Enhanced International ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.10%
Fidelity Enhanced International ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
Fidelity Enhanced International ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Enhanced International ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Enhanced International ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Enhanced International ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Fidelity Enhanced International ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Enhanced International ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
Fidelity Enhanced International ETF | France  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Enhanced International ETF | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 21.80%
Fidelity Enhanced International ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
Fidelity Enhanced International ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
Fidelity Enhanced International ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Enhanced International ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 18.40%
Fidelity Enhanced International ETF | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
Fidelity Enhanced International ETF | Switzerland  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Enhanced International ETF | Spain  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Enhanced International ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 97.60%
Fidelity Enhanced International ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Enhanced International ETF | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Enhanced Large Cap Core ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Enhanced Large Cap Core ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Enhanced Large Cap Core ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Enhanced Large Cap Core ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Enhanced Large Cap Core ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Enhanced Large Cap Core ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Enhanced Large Cap Core ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Enhanced Large Cap Core ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Enhanced Large Cap Core ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Enhanced Large Cap Core ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Enhanced Large Cap Core ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Enhanced Large Cap Core ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 31.80%
Fidelity Enhanced Large Cap Core ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
Fidelity Enhanced Large Cap Core ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Enhanced Large Cap Core ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
Fidelity Enhanced Large Cap Core ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Enhanced Large Cap Core ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
Fidelity Enhanced Large Cap Core ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Enhanced Large Cap Core ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Enhanced Large Cap Core ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Enhanced Large Cap Core ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Enhanced Large Cap Core ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
Fidelity Enhanced Large Cap Core ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Enhanced Large Cap Core ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
Fidelity Enhanced Large Cap Core ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Enhanced Large Cap Growth ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
Fidelity Enhanced Large Cap Growth ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
Fidelity Enhanced Large Cap Growth ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Enhanced Large Cap Growth ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Enhanced Large Cap Growth ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Enhanced Large Cap Growth ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Enhanced Large Cap Growth ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Enhanced Large Cap Growth ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Enhanced Large Cap Growth ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Enhanced Large Cap Growth ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Enhanced Large Cap Growth ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Enhanced Large Cap Growth ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 48.80%
Fidelity Enhanced Large Cap Growth ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Enhanced Large Cap Growth ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Large Cap Growth ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Enhanced Large Cap Growth ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Enhanced Large Cap Growth ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
Fidelity Enhanced Large Cap Growth ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Enhanced Large Cap Growth ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
Fidelity Enhanced Large Cap Growth ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Enhanced Large Cap Growth ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity Enhanced Large Cap Growth ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Large Cap Growth ETF | Finland  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Large Cap Growth ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
Fidelity Enhanced Large Cap Growth ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Enhanced Small Cap ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Enhanced Small Cap ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Enhanced Small Cap ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Enhanced Small Cap ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Enhanced Small Cap ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Enhanced Small Cap ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Enhanced Small Cap ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Enhanced Small Cap ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Enhanced Small Cap ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Enhanced Small Cap ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Enhanced Small Cap ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
Fidelity Enhanced Small Cap ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
Fidelity Enhanced Small Cap ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
Fidelity Enhanced Small Cap ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Enhanced Small Cap ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.60%
Fidelity Enhanced Small Cap ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
Fidelity Enhanced Small Cap ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
Fidelity Enhanced Small Cap ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Enhanced Small Cap ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Enhanced Small Cap ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Enhanced Small Cap ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Enhanced Small Cap ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 98.60%
Fidelity Enhanced Small Cap ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Small Cap ETF | Switzerland  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Small Cap ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Enhanced Small Cap ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Enhanced Small Cap ETF | Puerto Rico  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Small Cap ETF | Thailand  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Enhanced Small Cap ETF | Monaco  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Small Cap ETF | Norway  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Small Cap ETF | Panama  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Small Cap ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.30%
Fidelity Enhanced Small Cap ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Enhanced Mid Cap ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Enhanced Mid Cap ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Enhanced Mid Cap ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Enhanced Mid Cap ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Enhanced Mid Cap ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Enhanced Mid Cap ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Enhanced Mid Cap ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Enhanced Mid Cap ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Enhanced Mid Cap ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Enhanced Mid Cap ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Enhanced Mid Cap ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 16.80%
Fidelity Enhanced Mid Cap ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
Fidelity Enhanced Mid Cap ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Enhanced Mid Cap ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Enhanced Mid Cap ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
Fidelity Enhanced Mid Cap ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Enhanced Mid Cap ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
Fidelity Enhanced Mid Cap ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Enhanced Mid Cap ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Enhanced Mid Cap ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Enhanced Mid Cap ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Enhanced Mid Cap ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 98.80%
Fidelity Enhanced Mid Cap ETF | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Enhanced Mid Cap ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Enhanced Mid Cap ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Mid Cap ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Mid Cap ETF | Puerto Rico  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Enhanced Mid Cap ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.10%
Fidelity Enhanced Mid Cap ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Enhanced U.S. All-Cap Equity ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Enhanced U.S. All-Cap Equity ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
Fidelity Enhanced U.S. All-Cap Equity ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.70%
Fidelity Enhanced U.S. All-Cap Equity ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
Fidelity Enhanced U.S. All-Cap Equity ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Enhanced U.S. All-Cap Equity ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Enhanced U.S. All-Cap Equity ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Enhanced U.S. All-Cap Equity ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Enhanced U.S. All-Cap Equity ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Enhanced U.S. All-Cap Equity ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
Fidelity Enhanced U.S. All-Cap Equity ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Enhanced U.S. All-Cap Equity ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Enhanced U.S. All-Cap Equity ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.20%
Fidelity Enhanced U.S. All-Cap Equity ETF | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Enhanced U.S. All-Cap Equity ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced U.S. All-Cap Equity ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced U.S. All-Cap Equity ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced U.S. All-Cap Equity ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Enhanced U.S. All-Cap Equity ETF | Monaco  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced U.S. All-Cap Equity ETF | BailiwickOfGuernseyMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced U.S. All-Cap Equity ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
Fidelity Enhanced U.S. All-Cap Equity ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Enhanced Emerging Markets ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Enhanced Emerging Markets ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Enhanced Emerging Markets ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Enhanced Emerging Markets ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Enhanced Emerging Markets ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Enhanced Emerging Markets ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Enhanced Emerging Markets ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Enhanced Emerging Markets ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Enhanced Emerging Markets ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Enhanced Emerging Markets ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Enhanced Emerging Markets ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.70%
Fidelity Enhanced Emerging Markets ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 24.60%
Fidelity Enhanced Emerging Markets ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Enhanced Emerging Markets ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Enhanced Emerging Markets ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Enhanced Emerging Markets ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Enhanced Emerging Markets ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
Fidelity Enhanced Emerging Markets ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Enhanced Emerging Markets ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Enhanced Emerging Markets ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Enhanced Emerging Markets ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Enhanced Emerging Markets ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Enhanced Emerging Markets ETF | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Enhanced Emerging Markets ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 31.10%
Fidelity Enhanced Emerging Markets ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 19.00%
Fidelity Enhanced Emerging Markets ETF | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Enhanced Emerging Markets ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Enhanced Emerging Markets ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
Fidelity Enhanced Emerging Markets ETF | India  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
Fidelity Enhanced Emerging Markets ETF | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Enhanced Emerging Markets ETF | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Enhanced Emerging Markets ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.80%
Fidelity Enhanced Emerging Markets ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%