v3.25.2
Shareholder Report, Holdings (Details)
Jul. 31, 2025
Fidelity Women's Leadership ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Women's Leadership ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Women's Leadership ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Women's Leadership ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Women's Leadership ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Women's Leadership ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Women's Leadership ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Women's Leadership ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Women's Leadership ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Women's Leadership ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Women's Leadership ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
Fidelity Women's Leadership ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 28.00%
Fidelity Women's Leadership ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
Fidelity Women's Leadership ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Women's Leadership ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
Fidelity Women's Leadership ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Women's Leadership ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
Fidelity Women's Leadership ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Women's Leadership ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
Fidelity Women's Leadership ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Women's Leadership ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Women's Leadership ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 97.90%
Fidelity Women's Leadership ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Women's Leadership ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Women's Leadership ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Women's Leadership ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
Fidelity Women's Leadership ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Value Factor ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Value Factor ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
Fidelity Value Factor ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Value Factor ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Value Factor ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Value Factor ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Value Factor ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Value Factor ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Value Factor ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Value Factor ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Value Factor ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
Fidelity Value Factor ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
Fidelity Value Factor ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Value Factor ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Value Factor ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
Fidelity Value Factor ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Value Factor ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
Fidelity Value Factor ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Value Factor ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
Fidelity Value Factor ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Value Factor ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Value Factor ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
Fidelity Value Factor ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Value Factor ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Value Factor ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity Value Factor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity U.S. Multifactor ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity U.S. Multifactor ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity U.S. Multifactor ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity U.S. Multifactor ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity U.S. Multifactor ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity U.S. Multifactor ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity U.S. Multifactor ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity U.S. Multifactor ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity U.S. Multifactor ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity U.S. Multifactor ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity U.S. Multifactor ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
Fidelity U.S. Multifactor ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 32.70%
Fidelity U.S. Multifactor ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity U.S. Multifactor ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity U.S. Multifactor ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
Fidelity U.S. Multifactor ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity U.S. Multifactor ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity U.S. Multifactor ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity U.S. Multifactor ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity U.S. Multifactor ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity U.S. Multifactor ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity U.S. Multifactor ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.60%
Fidelity U.S. Multifactor ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity U.S. Multifactor ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity U.S. Multifactor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Sustainable U.S. Equity ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Sustainable U.S. Equity ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Sustainable U.S. Equity ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Sustainable U.S. Equity ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Fidelity Sustainable U.S. Equity ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Sustainable U.S. Equity ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Sustainable U.S. Equity ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Sustainable U.S. Equity ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Sustainable U.S. Equity ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Sustainable U.S. Equity ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Sustainable U.S. Equity ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
Fidelity Sustainable U.S. Equity ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 28.40%
Fidelity Sustainable U.S. Equity ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
Fidelity Sustainable U.S. Equity ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Sustainable U.S. Equity ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
Fidelity Sustainable U.S. Equity ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Sustainable U.S. Equity ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
Fidelity Sustainable U.S. Equity ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Sustainable U.S. Equity ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
Fidelity Sustainable U.S. Equity ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Sustainable U.S. Equity ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Sustainable U.S. Equity ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.70%
Fidelity Sustainable U.S. Equity ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Sustainable U.S. Equity ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Sustainable U.S. Equity ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Sustainable U.S. Equity ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Sustainable U.S. Equity ETF | India  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Sustainable U.S. Equity ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Sustainable U.S. Equity ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
Fidelity Sustainable U.S. Equity ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Stocks for Inflation ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
Fidelity Stocks for Inflation ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Stocks for Inflation ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Stocks for Inflation ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Stocks for Inflation ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Stocks for Inflation ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Stocks for Inflation ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Stocks for Inflation ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Stocks for Inflation ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Stocks for Inflation ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Stocks for Inflation ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Stocks for Inflation ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 27.00%
Fidelity Stocks for Inflation ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
Fidelity Stocks for Inflation ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Stocks for Inflation ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Stocks for Inflation ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
Fidelity Stocks for Inflation ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Stocks for Inflation ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Stocks for Inflation ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Stocks for Inflation ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Stocks for Inflation ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
Fidelity Stocks for Inflation ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Stocks for Inflation ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Stocks for Inflation ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
Fidelity Stocks for Inflation ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Small-Mid Multifactor ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Small-Mid Multifactor ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Small-Mid Multifactor ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Small-Mid Multifactor ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Small-Mid Multifactor ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Small-Mid Multifactor ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Small-Mid Multifactor ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Small-Mid Multifactor ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Small-Mid Multifactor ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Small-Mid Multifactor ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Small-Mid Multifactor ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 18.30%
Fidelity Small-Mid Multifactor ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
Fidelity Small-Mid Multifactor ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
Fidelity Small-Mid Multifactor ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Small-Mid Multifactor ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 21.60%
Fidelity Small-Mid Multifactor ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Small-Mid Multifactor ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Small-Mid Multifactor ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Small-Mid Multifactor ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Small-Mid Multifactor ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Small-Mid Multifactor ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Small-Mid Multifactor ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 97.90%
Fidelity Small-Mid Multifactor ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Small-Mid Multifactor ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Small-Mid Multifactor ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Small-Mid Multifactor ETF | Bermuda  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Small-Mid Multifactor ETF | Puerto Rico  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Small-Mid Multifactor ETF | Thailand  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Small-Mid Multifactor ETF | Monaco  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Small-Mid Multifactor ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity Small-Mid Multifactor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Fundamental Small-Mid Cap ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Fundamental Small-Mid Cap ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Fundamental Small-Mid Cap ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Fundamental Small-Mid Cap ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Fundamental Small-Mid Cap ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Fundamental Small-Mid Cap ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Fundamental Small-Mid Cap ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Fundamental Small-Mid Cap ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Fundamental Small-Mid Cap ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Fundamental Small-Mid Cap ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Fundamental Small-Mid Cap ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
Fidelity Fundamental Small-Mid Cap ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
Fidelity Fundamental Small-Mid Cap ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Fundamental Small-Mid Cap ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Fundamental Small-Mid Cap ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
Fidelity Fundamental Small-Mid Cap ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Fundamental Small-Mid Cap ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
Fidelity Fundamental Small-Mid Cap ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Fundamental Small-Mid Cap ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fundamental Small-Mid Cap ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Fundamental Small-Mid Cap ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Fundamental Small-Mid Cap ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.00%
Fidelity Fundamental Small-Mid Cap ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Fundamental Small-Mid Cap ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Fundamental Small-Mid Cap ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Fundamental Small-Mid Cap ETF | Puerto Rico  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Fundamental Small-Mid Cap ETF | Thailand  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Fundamental Small-Mid Cap ETF | Israel  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Fundamental Small-Mid Cap ETF | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Fundamental Small-Mid Cap ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
Fidelity Fundamental Small-Mid Cap ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Real Estate Investment ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
Fidelity Real Estate Investment ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
Fidelity Real Estate Investment ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Real Estate Investment ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Real Estate Investment ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Real Estate Investment ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Real Estate Investment ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Real Estate Investment ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Real Estate Investment ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Real Estate Investment ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Real Estate Investment ETF | TI0Member  
Holdings [Line Items]  
Percent of Net Asset Value 35.00%
Fidelity Real Estate Investment ETF | TI1Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
Fidelity Real Estate Investment ETF | TI2Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
Fidelity Real Estate Investment ETF | TI3Member  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
Fidelity Real Estate Investment ETF | TI4Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
Fidelity Real Estate Investment ETF | TI5Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Real Estate Investment ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
Fidelity Real Estate Investment ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Real Estate Investment ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Quality Factor ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Quality Factor ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Quality Factor ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Quality Factor ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Quality Factor ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Quality Factor ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Quality Factor ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Quality Factor ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Quality Factor ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Quality Factor ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Quality Factor ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
Fidelity Quality Factor ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 32.20%
Fidelity Quality Factor ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Quality Factor ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Quality Factor ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Quality Factor ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Quality Factor ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
Fidelity Quality Factor ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Quality Factor ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
Fidelity Quality Factor ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Quality Factor ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Quality Factor ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
Fidelity Quality Factor ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity Quality Factor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Fundamental Large Cap Core ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
Fidelity Fundamental Large Cap Core ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
Fidelity Fundamental Large Cap Core ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Fundamental Large Cap Core ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Fundamental Large Cap Core ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Fundamental Large Cap Core ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Fundamental Large Cap Core ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Fundamental Large Cap Core ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Fundamental Large Cap Core ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Fundamental Large Cap Core ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Fundamental Large Cap Core ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
Fidelity Fundamental Large Cap Core ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.20%
Fidelity Fundamental Large Cap Core ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Fundamental Large Cap Core ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Fundamental Large Cap Core ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
Fidelity Fundamental Large Cap Core ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Fundamental Large Cap Core ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
Fidelity Fundamental Large Cap Core ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Fundamental Large Cap Core ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
Fidelity Fundamental Large Cap Core ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Fundamental Large Cap Core ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Fundamental Large Cap Core ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.10%
Fidelity Fundamental Large Cap Core ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Fundamental Large Cap Core ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Fundamental Large Cap Core ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Fundamental Large Cap Core ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fundamental Large Cap Core ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Fundamental Large Cap Core ETF | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Fundamental Large Cap Core ETF | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Fundamental Large Cap Core ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Fundamental Large Cap Core ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Fundamental Large Cap Core ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity Fundamental Large Cap Core ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Momentum Factor ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Momentum Factor ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Momentum Factor ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Momentum Factor ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Momentum Factor ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Momentum Factor ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Momentum Factor ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Momentum Factor ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Momentum Factor ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Momentum Factor ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Momentum Factor ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Momentum Factor ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 33.20%
Fidelity Momentum Factor ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Momentum Factor ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Momentum Factor ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
Fidelity Momentum Factor ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Momentum Factor ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
Fidelity Momentum Factor ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Momentum Factor ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity Momentum Factor ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Momentum Factor ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Momentum Factor ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
Fidelity Momentum Factor ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Momentum Factor ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Momentum Factor ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
Fidelity Momentum Factor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Magellan ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Magellan ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Magellan ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Magellan ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Magellan ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Magellan ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Magellan ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Magellan ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Magellan ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Magellan ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Magellan ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
Fidelity Magellan ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 38.90%
Fidelity Magellan ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Magellan ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.20%
Fidelity Magellan ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Magellan ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
Fidelity Magellan ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Magellan ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Magellan ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 96.10%
Fidelity Magellan ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Magellan ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Magellan ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Magellan ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.30%
Fidelity Magellan ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Low Volatility Factor ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Low Volatility Factor ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Low Volatility Factor ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Low Volatility Factor ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Low Volatility Factor ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Low Volatility Factor ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Low Volatility Factor ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Low Volatility Factor ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Low Volatility Factor ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Low Volatility Factor ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Low Volatility Factor ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
Fidelity Low Volatility Factor ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
Fidelity Low Volatility Factor ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
Fidelity Low Volatility Factor ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Low Volatility Factor ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Low Volatility Factor ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Low Volatility Factor ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Low Volatility Factor ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
Fidelity Low Volatility Factor ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Low Volatility Factor ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Low Volatility Factor ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Low Volatility Factor ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 99.10%
Fidelity Low Volatility Factor ETF | Ireland  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Low Volatility Factor ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Low Volatility Factor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity High Dividend ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity High Dividend ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Fidelity High Dividend ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity High Dividend ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity High Dividend ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity High Dividend ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity High Dividend ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity High Dividend ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity High Dividend ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity High Dividend ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity High Dividend ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.60%
Fidelity High Dividend ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 25.60%
Fidelity High Dividend ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity High Dividend ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
Fidelity High Dividend ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity High Dividend ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity High Dividend ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
Fidelity High Dividend ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity High Dividend ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity High Dividend ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity High Dividend ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 95.40%
Fidelity High Dividend ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity High Dividend ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity High Dividend ETF | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity High Dividend ETF | Sweden  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity High Dividend ETF | Hong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity High Dividend ETF | Singapore  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity High Dividend ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
Fidelity High Dividend ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Fundamental Large Cap Growth ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
Fidelity Fundamental Large Cap Growth ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
Fidelity Fundamental Large Cap Growth ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Fundamental Large Cap Growth ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Fundamental Large Cap Growth ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Fundamental Large Cap Growth ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Fundamental Large Cap Growth ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Fundamental Large Cap Growth ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Fundamental Large Cap Growth ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Fundamental Large Cap Growth ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Fundamental Large Cap Growth ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
Fidelity Fundamental Large Cap Growth ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 45.10%
Fidelity Fundamental Large Cap Growth ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Fundamental Large Cap Growth ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Fundamental Large Cap Growth ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Fundamental Large Cap Growth ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Fundamental Large Cap Growth ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 14.20%
Fidelity Fundamental Large Cap Growth ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Fundamental Large Cap Growth ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
Fidelity Fundamental Large Cap Growth ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Fundamental Large Cap Growth ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 94.70%
Fidelity Fundamental Large Cap Growth ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Fundamental Large Cap Growth ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Fundamental Large Cap Growth ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Fundamental Large Cap Growth ETF | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Fundamental Large Cap Growth ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Fundamental Large Cap Growth ETF | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Fundamental Large Cap Growth ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Fundamental Large Cap Growth ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.30%
Fidelity Fundamental Large Cap Growth ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Dividend ETF for Rising Rates | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Dividend ETF for Rising Rates | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Dividend ETF for Rising Rates | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Dividend ETF for Rising Rates | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Dividend ETF for Rising Rates | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Dividend ETF for Rising Rates | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Dividend ETF for Rising Rates | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Dividend ETF for Rising Rates | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Dividend ETF for Rising Rates | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Dividend ETF for Rising Rates | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Dividend ETF for Rising Rates | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
Fidelity Dividend ETF for Rising Rates | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 33.20%
Fidelity Dividend ETF for Rising Rates | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Dividend ETF for Rising Rates | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Dividend ETF for Rising Rates | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity Dividend ETF for Rising Rates | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Dividend ETF for Rising Rates | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
Fidelity Dividend ETF for Rising Rates | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
Fidelity Dividend ETF for Rising Rates | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
Fidelity Dividend ETF for Rising Rates | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Dividend ETF for Rising Rates | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Dividend ETF for Rising Rates | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.90%
Fidelity Dividend ETF for Rising Rates | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Dividend ETF for Rising Rates | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Dividend ETF for Rising Rates | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Dividend ETF for Rising Rates | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Dividend ETF for Rising Rates | Hong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Dividend ETF for Rising Rates | Singapore  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Dividend ETF for Rising Rates | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Dividend ETF for Rising Rates | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Dividend ETF for Rising Rates | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Dividend ETF for Rising Rates | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Blue Chip Value ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Blue Chip Value ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Blue Chip Value ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Blue Chip Value ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Blue Chip Value ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Blue Chip Value ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Blue Chip Value ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Blue Chip Value ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Blue Chip Value ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Blue Chip Value ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Blue Chip Value ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 23.50%
Fidelity Blue Chip Value ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
Fidelity Blue Chip Value ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
Fidelity Blue Chip Value ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Blue Chip Value ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
Fidelity Blue Chip Value ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Blue Chip Value ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Blue Chip Value ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
Fidelity Blue Chip Value ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
Fidelity Blue Chip Value ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Blue Chip Value ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Blue Chip Value ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 94.70%
Fidelity Blue Chip Value ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Blue Chip Value ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Blue Chip Value ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Blue Chip Value ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Blue Chip Value ETF | Switzerland  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Blue Chip Value ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
Fidelity Blue Chip Value ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Blue Chip Growth ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
Fidelity Blue Chip Growth ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Blue Chip Growth ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
Fidelity Blue Chip Growth ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Blue Chip Growth ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
Fidelity Blue Chip Growth ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Blue Chip Growth ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Blue Chip Growth ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Blue Chip Growth ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Blue Chip Growth ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Blue Chip Growth ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Blue Chip Growth ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 47.00%
Fidelity Blue Chip Growth ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
Fidelity Blue Chip Growth ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Blue Chip Growth ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Fidelity Blue Chip Growth ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Blue Chip Growth ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.20%
Fidelity Blue Chip Growth ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Blue Chip Growth ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.10%
Fidelity Blue Chip Growth ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Blue Chip Growth ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Blue Chip Growth ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 95.60%
Fidelity Blue Chip Growth ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Blue Chip Growth ETF | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Blue Chip Growth ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Blue Chip Growth ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Blue Chip Growth ETF | India  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Blue Chip Growth ETF | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Blue Chip Growth ETF | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Blue Chip Growth ETF | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Blue Chip Growth ETF | Finland  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Fidelity Blue Chip Growth ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Blue Chip Growth ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Fundamental Large Cap Value ETF | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Fundamental Large Cap Value ETF | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Fundamental Large Cap Value ETF | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Fundamental Large Cap Value ETF | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Fundamental Large Cap Value ETF | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Fundamental Large Cap Value ETF | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Fundamental Large Cap Value ETF | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Fundamental Large Cap Value ETF | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Fundamental Large Cap Value ETF | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Fundamental Large Cap Value ETF | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Fundamental Large Cap Value ETF | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.90%
Fidelity Fundamental Large Cap Value ETF | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Fundamental Large Cap Value ETF | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
Fidelity Fundamental Large Cap Value ETF | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Fundamental Large Cap Value ETF | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
Fidelity Fundamental Large Cap Value ETF | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Fundamental Large Cap Value ETF | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
Fidelity Fundamental Large Cap Value ETF | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Fundamental Large Cap Value ETF | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Fundamental Large Cap Value ETF | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
Fidelity Fundamental Large Cap Value ETF | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Fundamental Large Cap Value ETF | United States  
Holdings [Line Items]  
Percent of Net Asset Value 96.10%
Fidelity Fundamental Large Cap Value ETF | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Fundamental Large Cap Value ETF | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Fundamental Large Cap Value ETF | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Fundamental Large Cap Value ETF | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Fundamental Large Cap Value ETF | Spain  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Fundamental Large Cap Value ETF | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
Fidelity Fundamental Large Cap Value ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%