| Form N-CSR Cover | 12 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Fidelity Covington Trust |
| Entity Central Index Key | 0000945908 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Oct. 31, 2024 USD ($) shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Fidelity Covington Trust |
| Entity Central Index Key | 0000945908 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Fidelity International Value Factor ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® International Value Factor ETF |
| Class Name | Fidelity® International Value Factor ETF |
| Trading Symbol | FIVA |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® International Value Factor ETF for the period November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-FIDELITY |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® International Value Factor ETF $ 0.19 % |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.19% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B27"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE January 16, 2018 through October 31, 2024. Initial investment of $10,000. Fidelity® International Value Factor ETF $10,000 $8,554 $9,327 $7,805 $11,033 $8,956 $10,632 Fidelity International Value Factor Index℠ $10,000 $8,585 $9,404 $7,917 $11,264 $9,197 $10,973 MSCI World ex USA Index $10,000 $8,705 $9,693 $9,053 $12,301 $9,611 $10,843 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund Fidelity® International Value Factor ETF - NAV A 20.51% 6.56% 3.72% Fidelity® International Value Factor ETF - Market Price B 19.30% 6.63% 3.52% Fidelity International Value Factor Index℠ A 20.90% 7.13% 4.25% MSCI World ex USA Index A 24.13% 6.79% 4.47% A From January 16, 2018 B From January 18, 2018, date initially listed on the NYSE Arca, Inc. exchange Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Performance Inception Date | Jan. 16, 2018 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 166,482,976 |
| Holdings Count | shares | 107 |
| Advisory Fees Paid, Amount | $ 228,713 |
| Investment Company Portfolio Turnover | 71% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of October 31, 2024) KEY FACTS Fund Size $ Number of Holdings 107 Total Advisory Fee $ Portfolio Turnover 71 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Financials 23.4 Industrials 17.5 Health Care 11.1 Consumer Discretionary 9.9 Consumer Staples 8.3 Information Technology 7.5 Materials 7.3 Energy 5.1 Communication Services 4.0 Utilities 3.3 Real Estate 2.0 Common Stocks 99.4 Short-Term Investments and Net Other Assets (Liabilities) 0.6 ASSET ALLOCATION (% of Fund's net assets) Japan 22.2 United Kingdom 12.2 France 11.0 Canada 10.5 Germany 8.2 United States 7.2 Australia 6.3 Switzerland 3.8 Netherlands 3.7 Others 14.9 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Novo Nordisk A/S Series B 2.0 Hong Kong Exchanges & Clearing Ltd 1.9 ASML Holding NV 1.7 LVMH Moet Hennessy Louis Vuitton SE 1.6 Daimler Truck Holding AG 1.5 UBS Group AG 1.5 KDDI Corp 1.5 Allianz SE 1.5 HSBC Holdings PLC 1.4 Macquarie Group Ltd 1.4 16.0 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses The fund's contractual management fee was reduced during the reporting period. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses The fund's contractual management fee was reduced during the reporting period. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-FIDELITY</span>" id="sjs-B42"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-FIDELITY</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B43"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B44"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Fidelity International Multifactor ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® International Multifactor ETF |
| Class Name | Fidelity® International Multifactor ETF |
| Trading Symbol | FDEV |
| Security Exchange Name | CboeBZX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® International Multifactor ETF for the period November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-FIDELITY |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® International Multifactor ETF $ 0.19 % |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.19% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B62"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE February 26, 2019 through October 31, 2024. Initial investment of $10,000. Fidelity® International Multifactor ETF $10,000 $10,672 $10,061 $12,584 $9,770 $10,803 Fidelity International Multifactor Index℠ $10,000 $10,729 $10,153 $12,760 $9,975 $11,075 MSCI World ex USA Index $10,000 $10,664 $9,961 $13,534 $10,574 $11,930 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund Fidelity® International Multifactor ETF - NAV A 21.88% 4.29% 4.96% Fidelity® International Multifactor ETF - Market Price B 20.70% 4.32% 5.06% Fidelity International Multifactor Index℠ A 22.23% 4.76% 5.47% MSCI World ex USA Index A 24.13% 6.79% 7.15% A From February 26, 2019 B From February 28, 2019, date initially listed on the Cboe BZX Exchange, Inc. exchange Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Performance Inception Date | Feb. 26, 2019 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 87,167,560 |
| Holdings Count | shares | 205 |
| Advisory Fees Paid, Amount | $ 116,603 |
| Investment Company Portfolio Turnover | 55% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of October 31, 2024) KEY FACTS Fund Size $ Number of Holdings 205 Total Advisory Fee $ Portfolio Turnover 55 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Financials 18.5 Health Care 16.5 Industrials 13.5 Consumer Staples 12.4 Energy 9.5 Communication Services 8.8 Real Estate 6.6 Consumer Discretionary 5.9 Information Technology 4.4 Materials 3.2 Common Stocks 99.3 Short-Term Investments and Net Other Assets (Liabilities) 0.7 ASSET ALLOCATION (% of Fund's net assets) Japan 21.3 Canada 13.1 United Kingdom 11.8 Switzerland 7.1 France 6.9 United States 6.9 Australia 4.8 Germany 4.5 Netherlands 3.8 Others 19.8 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Novo Nordisk A/S Series B 2.1 PSP Swiss Property AG 1.7 Shell PLC 1.6 Daito Trust Construction Co Ltd 1.6 Roche Holding AG 1.4 Astrazeneca PLC 1.4 Novartis AG 1.4 TotalEnergies SE 1.2 Unilever PLC 1.2 Quebecor Inc Class B 1.2 14.8 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses Expense reductions The fund's contractual management fee was reduced during the reporting period. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses Expense reductions The fund's contractual management fee was reduced during the reporting period. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-FIDELITY</span>" id="sjs-B77"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-FIDELITY</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B78"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B79"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Fidelity Emerging Markets Multifactor ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Emerging Markets Multifactor ETF |
| Class Name | Fidelity® Emerging Markets Multifactor ETF |
| Trading Symbol | FDEM |
| Security Exchange Name | CboeBZX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Emerging Markets Multifactor ETF for the period November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-FIDELITY |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Emerging Markets Multifactor ETF $ 0.27 % |
| Expenses Paid, Amount | $ 30 |
| Expense Ratio, Percent | 0.27% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B97"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE February 26, 2019 through October 31, 2024. Initial investment of $10,000. Fidelity® Emerging Markets Multifactor ETF $10,000 $10,066 $9,660 $11,065 $8,679 $9,960 Fidelity Emerging Markets Multifactor Index℠ $10,000 $10,153 $9,794 $11,353 $8,859 $10,309 MSCI Emerging Markets Index $10,000 $9,992 $10,819 $12,656 $8,730 $9,677 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund Fidelity® Emerging Markets Multifactor ETF - NAV A 25.20% 4.38% 3.96% Fidelity® Emerging Markets Multifactor ETF - Market Price B 25.57% 4.57% 4.23% Fidelity Emerging Markets Multifactor Index℠ A 27.68% 5.33% 4.96% MSCI Emerging Markets Index A 25.33% 3.95% 3.45% A From February 26, 2019 B From February 28, 2019, date initially listed on the Cboe BZX Exchange, Inc. exchange Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Performance Inception Date | Feb. 26, 2019 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 103,469,403 |
| Holdings Count | shares | 205 |
| Advisory Fees Paid, Amount | $ 144,014 |
| Investment Company Portfolio Turnover | 65% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of October 31, 2024) KEY FACTS Fund Size $ Number of Holdings 205 Total Advisory Fee $ Portfolio Turnover 65 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 20.4 Financials 19.0 Consumer Discretionary 18.3 Communication Services 13.7 Energy 9.2 Consumer Staples 8.7 Real Estate 5.2 Industrials 3.5 Materials 1.8 Utilities 0.0 Common Stocks 99.8 Preferred Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.2 ASSET ALLOCATION (% of Fund's net assets) China 26.9 Taiwan 20.3 India 15.4 Korea (South) 9.9 Indonesia 4.2 Mexico 3.9 Turkey 3.4 Saudi Arabia 2.7 United Arab Emirates 2.7 Others 10.6 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Taiwan Semiconductor Manufacturing Co Ltd 8.4 Tencent Holdings Ltd 4.5 Samsung Electronics Co Ltd 2.7 Emaar Properties PJSC 2.0 Huaku Development Co Ltd 1.6 Terrafina 1.6 JD.com Inc A Shares 1.5 PDD Holdings Inc Class A ADR 1.4 Trip.com Group Ltd 1.3 China Shenhua Energy Co Ltd H Shares 1.1 26.1 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses Expense reductions The fund's contractual management fee was reduced during the reporting period. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses Expense reductions The fund's contractual management fee was reduced during the reporting period. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-FIDELITY</span>" id="sjs-B112"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-FIDELITY</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B113"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B114"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Fidelity International High Dividend ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® International High Dividend ETF |
| Class Name | Fidelity® International High Dividend ETF |
| Trading Symbol | FIDI |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® International High Dividend ETF for the period November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-FIDELITY |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® International High Dividend ETF $ 0.19 % |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.19% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B132"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE January 16, 2018 through October 31, 2024. Initial investment of $10,000. Fidelity® International High Dividend ETF $10,000 $8,456 $9,035 $6,777 $9,812 $8,259 $9,215 Fidelity International High Dividend Index℠ $10,000 $8,488 $9,107 $6,857 $9,975 $8,445 $9,467 MSCI World ex USA Index $10,000 $8,705 $9,693 $9,053 $12,301 $9,611 $10,843 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund Fidelity® International High Dividend ETF - NAV A 21.22% 4.33% 1.64% Fidelity® International High Dividend ETF - Market Price B 20.36% 4.40% 1.44% Fidelity International High Dividend Index℠ A 21.62% 4.80% 2.10% MSCI World ex USA Index A 24.13% 6.79% 4.47% A From January 16, 2018 B From January 18, 2018, date initially listed on the NYSE Arca, Inc. exchange Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Performance Inception Date | Jan. 16, 2018 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 98,714,955 |
| Holdings Count | shares | 104 |
| Advisory Fees Paid, Amount | $ 172,761 |
| Investment Company Portfolio Turnover | 63% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of October 31, 2024) KEY FACTS Fund Size $ Number of Holdings 104 Total Advisory Fee $ Portfolio Turnover 63 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Financials 30.5 Materials 13.4 Energy 11.8 Utilities 11.1 Communication Services 10.7 Industrials 9.9 Health Care 4.1 Consumer Discretionary 4.0 Information Technology 2.2 Consumer Staples 1.7 Common Stocks 99.4 Short-Term Investments and Net Other Assets (Liabilities) 0.6 ASSET ALLOCATION (% of Fund's net assets) Canada 16.8 Japan 15.6 Australia 10.3 France 9.5 United Kingdom 9.0 Italy 4.8 Spain 4.6 Finland 3.5 Norway 3.5 Others 22.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Enel SpA 3.3 Telefonica SA 3.1 SoftBank Corp 3.0 Engie SA 3.0 Vodafone Group PLC 2.9 Hong Kong & China Gas Co Ltd 2.6 Enbridge Inc 2.6 TotalEnergies SE 2.5 HSBC Holdings PLC 2.3 Emera Inc 2.2 27.5 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses The fund's contractual management fee was reduced during the reporting period. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Operating expenses The fund's contractual management fee was reduced during the reporting period. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by November 29, 2024 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-FIDELITY or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-FIDELITY</span>" id="sjs-B147"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-FIDELITY</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B148"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B149"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 60 Months Ended | 72 Months Ended | 84 Months Ended | ||||||
| Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018 | |
| C000194896_1_BBIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 24.13% | |||||||||
| C000194896_1_BBIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 6.79% | |||||||||
| C000194896_1_BBIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.47% | |||||||||
| C000209805_1_BBIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 24.13% | |||||||||
| C000209805_1_BBIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 6.79% | |||||||||
| C000209805_1_BBIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 7.15% | |||||||||
| C000209804_1_BBIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 25.33% | |||||||||
| C000209804_1_BBIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 3.95% | |||||||||
| C000209804_1_BBIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 3.45% | |||||||||
| C000194895_1_BBIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 24.13% | |||||||||
| C000194895_1_BBIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 6.79% | |||||||||
| C000194895_1_BBIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.47% | |||||||||
| C000194896_LG_ClassMember_7YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity® International Value Factor ETF</span>" id="sjs-E41"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® International Value Factor ETF</span> | |||||||||
| C000194896_ClassMember_AsOf_2018Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 10,000 | |||||||||
| C000194896_ClassMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 8,554 | |||||||||
| C000194896_ClassMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 9,327 | |||||||||
| C000194896_ClassMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 7,805 | |||||||||
| C000194896_ClassMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 11,033 | |||||||||
| C000194896_ClassMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 8,956 | |||||||||
| C000194896_ClassMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 10,632 | $ 10,632 | $ 10,632 | $ 10,632 | ||||||
| C000194896_LG_1_AdditionalIndexMember_7YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity International Value Factor Index℠</span>" id="sjs-E65"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity International Value Factor Index℠</span> | |||||||||
| C000194896_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000194896_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,585 | |||||||||
| C000194896_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,404 | |||||||||
| C000194896_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 7,917 | |||||||||
| C000194896_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 11,264 | |||||||||
| C000194896_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,197 | |||||||||
| C000194896_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,973 | 10,973 | 10,973 | $ 10,973 | ||||||
| C000194896_LG_2_AdditionalIndexMember_7YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | MSCI World ex USA Index</span>" id="sjs-E89"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI World ex USA Index</span> | |||||||||
| C000194896_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000194896_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,705 | |||||||||
| C000194896_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,693 | |||||||||
| C000194896_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,053 | |||||||||
| C000194896_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 12,301 | |||||||||
| C000194896_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,611 | |||||||||
| C000194896_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 10,843 | $ 10,843 | $ 10,843 | $ 10,843 | ||||||
| C000194896_NoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 20.51% | |||||||||
| C000194896_NoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 6.56% | |||||||||
| C000194896_NoLoadClassMember_2023-11-01_2024-10-31Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 3.72% | |||||||||
| C000194896_ETFNoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 19.30% | |||||||||
| C000194896_ETFNoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 6.63% | |||||||||
| C000194896_ETFNoLoadClassMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 3.52% | |||||||||
| C000194896_0_AdditionalIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 20.90% | |||||||||
| C000194896_0_AdditionalIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 7.13% | |||||||||
| C000194896_0_AdditionalIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.25% | |||||||||
| C000209805_LG_ClassMember_6YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity® International Multifactor ETF</span>" id="sjs-D140"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® International Multifactor ETF</span> | |||||||||
| C000209805_ClassMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000209805_ClassMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,672 | |||||||||
| C000209805_ClassMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,061 | |||||||||
| C000209805_ClassMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 12,584 | |||||||||
| C000209805_ClassMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,770 | |||||||||
| C000209805_ClassMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 10,803 | $ 10,803 | $ 10,803 | 10,803 | ||||||
| C000209805_LG_1_AdditionalIndexMember_6YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity International Multifactor Index℠</span>" id="sjs-D161"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity International Multifactor Index℠</span> | |||||||||
| C000209805_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000209805_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,729 | |||||||||
| C000209805_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,153 | |||||||||
| C000209805_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 12,760 | |||||||||
| C000209805_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,975 | |||||||||
| C000209805_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 11,075 | 11,075 | $ 11,075 | 11,075 | ||||||
| C000209805_LG_2_AdditionalIndexMember_6YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | MSCI World ex USA Index</span>" id="sjs-D182"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI World ex USA Index</span> | |||||||||
| C000209805_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000209805_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,664 | |||||||||
| C000209805_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,961 | |||||||||
| C000209805_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 13,534 | |||||||||
| C000209805_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,574 | |||||||||
| C000209805_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 11,930 | $ 11,930 | $ 11,930 | 11,930 | ||||||
| C000209805_NoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 21.88% | |||||||||
| C000209805_NoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.29% | |||||||||
| C000209805_NoLoadClassMember_2023-11-01_2024-10-31Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.96% | |||||||||
| C000209805_ETFNoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 20.70% | |||||||||
| C000209805_ETFNoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.32% | |||||||||
| C000209805_ETFNoLoadClassMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 5.06% | |||||||||
| C000209805_0_AdditionalIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 22.23% | |||||||||
| C000209805_0_AdditionalIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.76% | |||||||||
| C000209805_0_AdditionalIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 5.47% | |||||||||
| C000209804_LG_ClassMember_6YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity® Emerging Markets Multifactor ETF</span>" id="sjs-D230"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Emerging Markets Multifactor ETF</span> | |||||||||
| C000209804_ClassMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000209804_ClassMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,066 | |||||||||
| C000209804_ClassMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,660 | |||||||||
| C000209804_ClassMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 11,065 | |||||||||
| C000209804_ClassMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,679 | |||||||||
| C000209804_ClassMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 9,960 | $ 9,960 | $ 9,960 | 9,960 | ||||||
| C000209804_LG_1_AdditionalIndexMember_6YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity Emerging Markets Multifactor Index℠</span>" id="sjs-D251"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Emerging Markets Multifactor Index℠</span> | |||||||||
| C000209804_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000209804_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,153 | |||||||||
| C000209804_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,794 | |||||||||
| C000209804_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 11,353 | |||||||||
| C000209804_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,859 | |||||||||
| C000209804_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,309 | 10,309 | $ 10,309 | 10,309 | ||||||
| C000209804_LG_2_AdditionalIndexMember_6YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | MSCI Emerging Markets Index</span>" id="sjs-D272"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span> | |||||||||
| C000209804_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000209804_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,992 | |||||||||
| C000209804_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,819 | |||||||||
| C000209804_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 12,656 | |||||||||
| C000209804_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,730 | |||||||||
| C000209804_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 9,677 | $ 9,677 | $ 9,677 | $ 9,677 | ||||||
| C000209804_NoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 25.20% | |||||||||
| C000209804_NoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.38% | |||||||||
| C000209804_NoLoadClassMember_2023-11-01_2024-10-31Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 3.96% | |||||||||
| C000209804_ETFNoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 25.57% | |||||||||
| C000209804_ETFNoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.57% | |||||||||
| C000209804_ETFNoLoadClassMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.23% | |||||||||
| C000209804_0_AdditionalIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 27.68% | |||||||||
| C000209804_0_AdditionalIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 5.33% | |||||||||
| C000209804_0_AdditionalIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.96% | |||||||||
| C000194895_LG_ClassMember_7YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity® International High Dividend ETF</span>" id="sjs-E320"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® International High Dividend ETF</span> | |||||||||
| C000194895_ClassMember_AsOf_2018Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000194895_ClassMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,456 | |||||||||
| C000194895_ClassMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,035 | |||||||||
| C000194895_ClassMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 6,777 | |||||||||
| C000194895_ClassMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,812 | |||||||||
| C000194895_ClassMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,259 | |||||||||
| C000194895_ClassMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 9,215 | $ 9,215 | 9,215 | $ 9,215 | ||||||
| C000194895_LG_1_AdditionalIndexMember_7YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Fidelity International High Dividend Index℠</span>" id="sjs-E344"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity International High Dividend Index℠</span> | |||||||||
| C000194895_1_AdditionalIndexMember_AsOf_2018Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 10,000 | |||||||||
| C000194895_1_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,488 | |||||||||
| C000194895_1_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,107 | |||||||||
| C000194895_1_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 6,857 | |||||||||
| C000194895_1_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,975 | |||||||||
| C000194895_1_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 8,445 | |||||||||
| C000194895_1_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | 9,467 | 9,467 | 9,467 | $ 9,467 | ||||||
| C000194895_LG_2_AdditionalIndexMember_7YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | MSCI World ex USA Index</span>" id="sjs-E368"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI World ex USA Index</span> | |||||||||
| C000194895_2_AdditionalIndexMember_AsOf_2018Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 10,000 | |||||||||
| C000194895_2_AdditionalIndexMember_AsOf_2019Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 8,705 | |||||||||
| C000194895_2_AdditionalIndexMember_AsOf_2020Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 9,693 | |||||||||
| C000194895_2_AdditionalIndexMember_AsOf_2021Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 9,053 | |||||||||
| C000194895_2_AdditionalIndexMember_AsOf_2022Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 12,301 | |||||||||
| C000194895_2_AdditionalIndexMember_AsOf_2023Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 9,611 | |||||||||
| C000194895_2_AdditionalIndexMember_AsOf_2024Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Account Value | $ 10,843 | $ 10,843 | $ 10,843 | $ 10,843 | ||||||
| C000194895_NoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 21.22% | |||||||||
| C000194895_NoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.33% | |||||||||
| C000194895_NoLoadClassMember_2023-11-01_2024-10-31Member | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 1.64% | |||||||||
| C000194895_ETFNoLoadClassMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 20.36% | |||||||||
| C000194895_ETFNoLoadClassMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.40% | |||||||||
| C000194895_ETFNoLoadClassMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 1.44% | |||||||||
| C000194895_0_AdditionalIndexMember_1YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 21.62% | |||||||||
| C000194895_0_AdditionalIndexMember_5YRMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 4.80% | |||||||||
| C000194895_0_AdditionalIndexMember_LOCMember | ||||||||||
| Account Value [Line Items] | ||||||||||
| Average Annual Return, Percent | 2.10% |
| Shareholder Report, Holdings (Details) | Oct. 31, 2024 |
| Fidelity International Value Factor ETF | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity International Value Factor ETF | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity International Value Factor ETF | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity International Value Factor ETF | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity International Value Factor ETF | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity International Value Factor ETF | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity International Value Factor ETF | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity International Value Factor ETF | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity International Value Factor ETF | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity International Value Factor ETF | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity International Value Factor ETF | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.40% |
| Fidelity International Value Factor ETF | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity International Value Factor ETF | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Fidelity International Value Factor ETF | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity International Value Factor ETF | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.50% |
| Fidelity International Value Factor ETF | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity International Value Factor ETF | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity International Value Factor ETF | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.30% |
| Fidelity International Value Factor ETF | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Fidelity International Value Factor ETF | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity International Value Factor ETF | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity International Value Factor ETF | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Fidelity International Value Factor ETF | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.20% |
| Fidelity International Value Factor ETF | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| Fidelity International Value Factor ETF | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| Fidelity International Value Factor ETF | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| Fidelity International Value Factor ETF | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Fidelity International Value Factor ETF | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity International Value Factor ETF | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Fidelity International Value Factor ETF | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| Fidelity International Value Factor ETF | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Fidelity International Value Factor ETF | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.40% |
| Fidelity International Value Factor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity International Multifactor ETF | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity International Multifactor ETF | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity International Multifactor ETF | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity International Multifactor ETF | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity International Multifactor ETF | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity International Multifactor ETF | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity International Multifactor ETF | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity International Multifactor ETF | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity International Multifactor ETF | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity International Multifactor ETF | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity International Multifactor ETF | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.50% |
| Fidelity International Multifactor ETF | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity International Multifactor ETF | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.50% |
| Fidelity International Multifactor ETF | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Fidelity International Multifactor ETF | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| Fidelity International Multifactor ETF | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity International Multifactor ETF | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| Fidelity International Multifactor ETF | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.40% |
| Fidelity International Multifactor ETF | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Fidelity International Multifactor ETF | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity International Multifactor ETF | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.30% |
| Fidelity International Multifactor ETF | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.80% |
| Fidelity International Multifactor ETF | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Fidelity International Multifactor ETF | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| Fidelity International Multifactor ETF | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Fidelity International Multifactor ETF | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Fidelity International Multifactor ETF | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Fidelity International Multifactor ETF | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Fidelity International Multifactor ETF | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Fidelity International Multifactor ETF | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.80% |
| Fidelity International Multifactor ETF | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.30% |
| Fidelity International Multifactor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Emerging Markets Multifactor ETF | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| Fidelity Emerging Markets Multifactor ETF | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Fidelity Emerging Markets Multifactor ETF | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Emerging Markets Multifactor ETF | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Emerging Markets Multifactor ETF | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Emerging Markets Multifactor ETF | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Emerging Markets Multifactor ETF | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity Emerging Markets Multifactor ETF | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity Emerging Markets Multifactor ETF | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Emerging Markets Multifactor ETF | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Emerging Markets Multifactor ETF | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19% |
| Fidelity Emerging Markets Multifactor ETF | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.40% |
| Fidelity Emerging Markets Multifactor ETF | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| Fidelity Emerging Markets Multifactor ETF | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Emerging Markets Multifactor ETF | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Emerging Markets Multifactor ETF | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.30% |
| Fidelity Emerging Markets Multifactor ETF | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Fidelity Emerging Markets Multifactor ETF | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.70% |
| Fidelity Emerging Markets Multifactor ETF | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity Emerging Markets Multifactor ETF | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Emerging Markets Multifactor ETF | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.60% |
| Fidelity Emerging Markets Multifactor ETF | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.90% |
| Fidelity Emerging Markets Multifactor ETF | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.30% |
| Fidelity Emerging Markets Multifactor ETF | India | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| Fidelity Emerging Markets Multifactor ETF | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Emerging Markets Multifactor ETF | Indonesia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Emerging Markets Multifactor ETF | Mexico | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Fidelity Emerging Markets Multifactor ETF | Turkey | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Fidelity Emerging Markets Multifactor ETF | Saudi Arabia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Emerging Markets Multifactor ETF | United Arab Emirates | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Emerging Markets Multifactor ETF | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.80% |
| Fidelity Emerging Markets Multifactor ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Emerging Markets Multifactor ETF | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity International High Dividend ETF | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity International High Dividend ETF | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Fidelity International High Dividend ETF | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity International High Dividend ETF | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Fidelity International High Dividend ETF | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity International High Dividend ETF | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity International High Dividend ETF | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity International High Dividend ETF | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity International High Dividend ETF | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity International High Dividend ETF | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity International High Dividend ETF | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.50% |
| Fidelity International High Dividend ETF | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity International High Dividend ETF | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity International High Dividend ETF | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity International High Dividend ETF | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Fidelity International High Dividend ETF | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Fidelity International High Dividend ETF | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity International High Dividend ETF | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity International High Dividend ETF | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.80% |
| Fidelity International High Dividend ETF | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Fidelity International High Dividend ETF | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| Fidelity International High Dividend ETF | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Fidelity International High Dividend ETF | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity International High Dividend ETF | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.80% |
| Fidelity International High Dividend ETF | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.30% |
| Fidelity International High Dividend ETF | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.40% |
| Fidelity International High Dividend ETF | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Fidelity International High Dividend ETF | Spain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity International High Dividend ETF | Finland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity International High Dividend ETF | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity International High Dividend ETF | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.40% |
| Fidelity International High Dividend ETF | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
