Risk/Return Detail Data - ThematicIndexETFs-ComboPRO	Oct. 30, 2024 USD ($)
Risk/Return:
Registrant Name	Fidelity Covington Trust
ThematicIndexETFs-ComboPRO | Fidelity Metaverse ETF
Risk/Return:
Risk/Return [Heading]	Fund Summary Fund: Fidelity® Metaverse ETF
Objective [Heading]	Investment Objective
Objective, Primary [Text Block]	Fidelity® Metaverse ETF seeks to provide investment returns that correspond, before fees and expenses, generally to the performance of the Fidelity Metaverse Index ℠ .
Expense [Heading]	Fee Table
Expense Narrative [Text Block]	The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Text]	Shareholder fees
(fees paid directly from your investment)	none
Operating Expenses Caption [Text]	Annual Operating Expenses
Fee Waiver or Reimbursement over Assets, Date of Termination	October 31, 2025
Portfolio Turnover [Heading]	Portfolio Turnover
Portfolio Turnover [Text Block]	The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 52 % of the average value of its portfolio.
Portfolio Turnover, Rate	52.00%
Expense Example Narrative [Text Block]	This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	Normally investing at least 80% of assets in securities included in the Fidelity Metaverse IndexSM and in depositary receipts representing securities included in the index. "Metaverse" is a term used to describe a future state of the internet characterized by a network of both augmented reality and virtual worlds that can be experienced persistently and in a shared environment by large numbers of users. The Fidelity Metaverse IndexSM is designed to reflect the performance of a global universe of companies that develop, manufacture, distribute, or sell products or services related to establishing and enabling the Metaverse. Lending securities to earn income for the fund.
Risk [Heading]	Principal Investment Risks
Bar Chart and Performance Table [Heading]	Performance
Performance Narrative [Text Block]	The following information is intended to help you understand the risks of investing in the fund. The information illustrates the performance of the fund's shares over the past year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time. The additional index has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus . Past performance (before and after taxes) is not an indication of future performance. Visit www.fidelity.com for more recent performance information.
Performance Information Illustrates Variability of Returns [Text]	The information illustrates the performance of the fund's shares over the past year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.
Performance Availability Website Address [Text]	www.fidelity.com
Performance Past Does Not Indicate Future [Text]	Past performance (before and after taxes) is not an indication of future performance.
Bar Chart [Heading]	Year-by-Year Returns
Year to Date Return, Label	Year-to-Date Return
Bar Chart, Year to Date Return, Date	Jun. 30, 2024
Bar Chart, Year to Date Return	9.16%
Highest Quarterly Return, Label	Highest Quarter Return
Highest Quarterly Return, Date	Mar. 31, 2023
Highest Quarterly Return	18.62%
Lowest Quarterly Return, Label	Lowest Quarter Return
Lowest Quarterly Return, Date	Sep. 30, 2023
Lowest Quarterly Return	(6.86%)
Performance Table Heading	Average Annual Returns
Performance Table Uses Highest Federal Rate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.
Performance Table Not Relevant to Tax Deferred	The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).
Performance Table Explanation after Tax Higher	Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
Performance Table Narrative	After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
ThematicIndexETFs-ComboPRO | Fidelity Metaverse ETF | Fidelity Metaverse ETF
Risk/Return:
Management fee	0.39%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.03%
Total annual operating expenses	0.42%
Fee waiver and/or expense reimbursement	0.02%	[1]
Total annual operating expenses after fee waiver and/or expense reimbursement	0.40%
1 year	$ 41
3 years	132
5 years	233
10 years	$ 527
Annual Return, Inception Date	Apr. 19, 2022
2023	40.62%
ThematicIndexETFs-ComboPRO | Fidelity Metaverse ETF | Return Before Taxes | Fidelity Metaverse ETF
Risk/Return:
Label	Return Before Taxes
Past 1 year	40.62%
Since Inception	6.62%	[2]
ThematicIndexETFs-ComboPRO | Fidelity Metaverse ETF | After Taxes on Distributions | Fidelity Metaverse ETF
Risk/Return:
Label	Return After Taxes on Distributions
Past 1 year	40.46%
Since Inception	6.52%	[2]
ThematicIndexETFs-ComboPRO | Fidelity Metaverse ETF | After Taxes on Distributions and Sales | Fidelity Metaverse ETF
Risk/Return:
Label	Return After Taxes on Distributions and Sale of Fund Shares
Past 1 year	24.13%
Since Inception	5.05%	[2]
ThematicIndexETFs-ComboPRO | Fidelity Metaverse ETF | IXV43
Risk/Return:
Label	Fidelity Metaverse Index℠
Past 1 year	41.37%
Since Inception	7.19%
ThematicIndexETFs-ComboPRO | Fidelity Metaverse ETF | MS159
Risk/Return:
Label	MSCI ACWI (All Country World Index) Index
Past 1 year	22.65%
Since Inception	4.98%

[1] A Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse the fund to the extent proxy and shareholder meeting expenses exceed 0.013% of the fund's average net assets. This arrangement will remain in effect through October 31, 2025 . FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.

[2] A From April 19, 2022 .