| Label | Element | Value |
|---|---|---|
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Registrant Name | dei_EntityRegistrantName | HARTFORD FUNDS EXCHANGE-TRADED TRUST |
| Prospectus Date | rr_ProspectusDate | Nov. 27, 2024 |
| Hartford Municipal Opportunities ETF | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk/Return [Heading] | rr_RiskReturnHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:20pt;font-weight:bold;">Hartford Municipal Opportunities ETF Summary Section</span> |
| Objective [Heading] | rr_ObjectiveHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">INVESTMENT OBJECTIVE. </span> |
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The Fund seeks to provide current income that is generally exempt from federal income taxes and long-term total return. |
| Expense [Heading] | rr_ExpenseHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">YOUR EXPENSES.</span> |
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | The table below describes the fees and expenses that you may pay if 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 table or the example below. |
| Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Annual Fund Operating Expenses</span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;"> (expenses that you pay each year as a percentage of the value of your investment):</span> |
| Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | <span style="font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Portfolio Turnover. </span> |
| Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | 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 fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended July 31, 2024, the Fund’s portfolio turnover rate was 38% of the average value of its portfolio. |
| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 38.00% |
| Expense Example [Heading] | rr_ExpenseExampleHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Example.</span> |
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The example below is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The example assumes that: ●Your investment has a 5% return each year ●The Fund’s operating expenses remain the same Your actual costs may be higher or lower. Based on these assumptions, for every $10,000 invested, you would pay the following expenses if you sell all of your shares at the end of each time period indicated: |
| Strategy [Heading] | rr_StrategyHeading | <span style="font-family:Arial Narrow;font-size:11pt;font-weight:bold;">PRINCIPAL INVESTMENT STRATEGY. </span> |
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | The Fund seeks to achieve its investment objective by investing in investment grade and non-investment grade (also known as “junk bonds”) municipal securities that the sub-adviser, Wellington Management Company LLP (“Wellington Management”), considers to be attractive from a yield perspective while considering total return. At least 80% of the Fund’s net assets must be invested in municipal securities, and up to 35% of the Fund’s net assets may be invested in non-investment grade municipal securities. The Fund may invest in securities that produce income subject to income tax, including the Alternative Minimum Tax. The Fund will generally hold a diversified portfolio of investments across states and sectors, although the Fund is not required to invest in all states and sectors at all times. The Fund may invest in securities of any maturity or duration. Wellington Management’s portfolio construction process combines a top-down strategy, bottom-up fundamental research and comprehensive risk management. Bottom-up, internally generated, fundamental research attempts to identify relative value among sectors, within sectors, and between individual securities. |
| Risk [Heading] | rr_RiskHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">PRINCIPAL RISKS. </span> |
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">PAST PERFORMANCE.</span> |
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The performance information below provides some indication of the risks of investing in the Fund by comparing the Fund’s performance to a broad measure of market performance.Keep in mind that past performance does not indicate future results. Updated performance information is available at hartfordfunds.com. The bar chart shows the Fund’s performance for each calendar year since the Fund’s inception. |
| Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;"> The performance information below provides some indication of the risks of investing in the Fund by comparing the Fund’s performance to a broad measure of market performance.</span> |
| Performance Additional Market Index [Text] | rr_PerformanceAdditionalMarketIndex | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">The table below shows returns for the Fund over time compared to those of two indices. The Bloomberg Municipal Bond 1-15 Year Blend (1-17) Index serves as the Fund’s performance index because the Fund’s investment manager believes it is more representative of the Fund’s investment strategy. The Bloomberg Municipal Bond Index serves as the Fund’s regulatory index and provides a broad measure of market performance.</span> |
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">hartfordfunds.com</span> |
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Keep in mind that past performance does not indicate future results.</span> |
| Bar Chart [Heading] | rr_BarChartHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Total returns by calendar year</span> |
| Bar Chart Closing [Text Block] | rr_BarChartClosingTextBlock | During the periods shown in the chart above:ReturnsQuarter EndedBest Quarter Return6.85%December 31, 2023Worst Quarter Return-6.01%March 31, 2022Theyear-to-datereturn of the Fund as ofSeptember 30, 2024was3.39%. |
| Performance Table Heading | rr_PerformanceTableHeading | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Average Annual Total Returns.</span> |
| Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">After-tax returns are calculated using the historical highest individual U.S. federal marginal income tax rates and do not reflect the impact of state and local taxes.</span> |
| Performance Table Not Relevant to Tax Deferred | rr_PerformanceTableNotRelevantToTaxDeferred | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Actual after-tax returns, which depend on an investor’s particular tax situation, may differ from those shown and are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.</span> |
| Performance Table Explanation after Tax Higher | rr_PerformanceTableExplanationAfterTaxHigher | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">In some instances, the “Return After Taxes on Distributions and Sale of Fund </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Shares” may be greater than “Return Before Taxes” because the investor is assumed to be able to use the capital loss from the sale of Fund shares to offset other taxable gains.</span> |
| Performance Table Narrative | rr_PerformanceTableNarrativeTextBlock | The table below shows returns for the Fund over time compared to those of two indices. The Bloomberg Municipal Bond 1-15 Year Blend (1-17) Index serves as the Fund’s performance index because the Fund’s investment manager believes it is more representative of the Fund’s investment strategy. The Bloomberg Municipal Bond Index serves as the Fund’s regulatory index and provides a broad measure of market performance.After-tax returns are calculated using the historical highest individual U.S. federal marginal income tax rates and do not reflect the impact of state and local taxes.In some instances, the “Return After Taxes on Distributions and Sale of Fund Shares” may be greater than “Return Before Taxes” because the investor is assumed to be able to use the capital loss from the sale of Fund shares to offset other taxable gains.Actual after-tax returns, which depend on an investor’s particular tax situation, may differ from those shown and are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. Updated performance information is available by visiting our website at hartfordfunds.com. |
| Caption | rr_AverageAnnualReturnCaption | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Average annual total returns for periods ending December 31, 2023</span> |
| Hartford Municipal Opportunities ETF | Risk Lose Money [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | When you sell your shares they may be worth more or less than what you paid for them, which means that you could lose money as a result of your investment. |
| Hartford Municipal Opportunities ETF | Risk Not Insured Depository Institution [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
| Hartford Municipal Opportunities ETF | Market Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Market Risk – Market risk is the risk that one or more markets in which the Fund invests will go down in value, including the possibility that the markets will go down sharply and unpredictably. Securities of a company may decline in value due to its financial prospects and activities, including certain operational impacts, such as data breaches and cybersecurity attacks. Securities may also decline in value due to general market and economic movements and trends, including adverse changes to credit markets, or as a result of other events such as geopolitical events, natural disasters, or widespread pandemics (such as COVID-19) or other adverse public health developments. |
| Hartford Municipal Opportunities ETF | Municipal Securities Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Municipal Securities Risk – Municipal securities risks include the possibility that the issuer may be unable to pay interest or repay principal on a timely basis or at all, the relative lack of information about certain issuers of municipal securities, and the possibility of future legislative changes which could affect the market for and value of municipal securities. In addition, state or local political or economic conditions and developments can adversely affect the securities issued by state and local governments. The value of the municipal securities owned by the Fund also may be adversely affected by future changes in federal or state income tax laws, including tax rate reductions or the determination that municipal securities are subject to taxation. |
| Hartford Municipal Opportunities ETF | Interest Rate Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Interest Rate Risk – The risk that your investment may go down in value when interest rates rise, because when interest rates rise, the prices of bonds and fixed rate loans fall. A wide variety of factors can cause interest rates to rise, including central bank monetary policies and inflation rates. Generally, the longer the maturity of a bond or fixed rate loan, the more sensitive it is to this risk. Falling interest rates also create the potential for a decline in the Fund’s income. These risks are greater during periods of rising inflation. Volatility in interest rates and in fixed income markets may increase the risk that the Fund’s investment in fixed income securities will go down in value. Actions taken by the Federal Reserve Board or foreign central banks to stimulate or stabilize economic growth, such as decreases or increases in short-term interest rates, may adversely affect markets, which could, in turn, negatively impact Fund performance. |
| Hartford Municipal Opportunities ETF | Credit Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Credit Risk – Credit risk is the risk that the issuer of a security or other instrument will not be able to make principal and interest payments when due. Changes in an issuer’s financial strength, credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of the Fund’s investment in that issuer. The degree of credit risk depends on both the financial condition of the issuer and the terms of the obligation. Periods of market volatility may increase credit risk. |
| Hartford Municipal Opportunities ETF | Call Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Call Risk – Call risk is the risk that an issuer, especially during a period of falling interest rates, may redeem a security by repaying it early, which may reduce the Fund’s income if the proceeds are reinvested at lower interest rates. |
| Hartford Municipal Opportunities ETF | High Yield Investments Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | High Yield Investments Risk – High yield investments rated below investment grade (also referred to as “junk bonds”) are considered to be speculative and are subject to heightened credit risk, which may make the Fund more sensitive to adverse developments in the U.S. and abroad. Lower rated debt securities generally involve greater risk of default or price changes due to changes in the issuer’s creditworthiness than higher rated debt securities. The market prices of these securities may fluctuate more than those of higher rated securities and may decline significantly in periods of general economic difficulty. There may be little trading in the secondary market for particular debt securities, which may make them more difficult to value or sell. |
| Hartford Municipal Opportunities ETF | Active Investment Management Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Active Investment Management Risk – The risk that, if the sub-adviser’s investment strategy does not perform as expected, the Fund could underperform its peers or lose money. |
| Hartford Municipal Opportunities ETF | Liquidity Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Liquidity Risk – The risk that the market for a particular investment or type of investment is or becomes relatively illiquid, making it difficult for the Fund to sell that investment at an advantageous time or price. Illiquidity may be due to events relating to the issuer of the securities, market events, rising interest rates, economic conditions or investor perceptions. Illiquid securities may be difficult to value and their value may be lower than the market price of comparable liquid securities, which would negatively affect the Fund’s performance. |
| Hartford Municipal Opportunities ETF | Market Price Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Market Price Risk – The net asset value (“NAV”) of the Fund’s shares and the value of your investment may fluctuate. The market prices of the Fund’s shares will generally fluctuate in accordance with changes in NAV and changes in the intraday value of the Fund’s holdings, as well as the relative supply of and demand for the shares on the Fund’s listing exchange. Although it is expected that the Fund’s shares will remain listed on the exchange, disruptions to creations and redemptions, the existence of market volatility or lack of an active trading market for the shares (including through a trading halt), as well as other factors, may result in the shares trading significantly above (at a premium to) or below (at a discount to) the Fund’s NAV or the intraday value of the Fund’s holdings. In addition, because liquidity in certain underlying portfolio securities may fluctuate over time, shares of the Fund may, at times, trade at a larger than normal premium or discount to NAV. In addition, to the extent certain of the Fund’s portfolio securities are trading on days or at times the Fund’s shares are not trading, bid-ask spreads and the resulting premium or discount to the NAV of the Fund’s shares may widen. During such periods, you may be unable to sell your shares or may incur significant losses if you sell your shares. There are various methods by which investors can purchase and sell shares and various types of orders that may be placed. Investors should consult their financial intermediary before purchasing or selling shares of the Fund. Neither the investment manager nor the Fund’s sub-adviser can predict whether the Fund’s shares will trade below, at or above their NAV. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for the Fund’s shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. In addition, unlike many ETFs, the Fund is not an index fund. The Fund is actively managed and does not seek to replicate the performance of a specified index. There can be no assurance as to whether and/or to what extent the Fund’s shares will trade at premiums or discounts to NAV or to the intraday value of the Fund’s holdings. |
| Hartford Municipal Opportunities ETF | Cash Transactions Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Cash Transactions Risk – The Fund may effect creations and redemptions partly or wholly for cash, rather than through in-kind distributions of securities. Because the Fund may effect redemptions for cash rather than in-kind, the Fund may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and it may subsequently recognize gains on such sales that the Fund might not have recognized if it were to distribute portfolio securities in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that primarily or wholly effects creations and redemptions in-kind. Moreover, cash transactions may have to be carried out over several days if the securities markets are relatively illiquid at the time the Fund must sell securities and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to purchasers and redeemers of Creation Units in the form of creation and redemption transaction fees. As a result of these factors, the spreads between the bid and the offered prices of the Fund’s shares may be wider than those of shares of ETFs that primarily or wholly transact in-kind. |
| Hartford Municipal Opportunities ETF | Authorized Participant Concentration Risk [Member] | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Risk [Text Block] | rr_RiskTextBlock | Authorized Participant Concentration Risk – Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants on an agency basis (i.e., on behalf of other market participants), and none of these authorized participants are or will be obligated to engage in creation or redemption transactions. To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund and no other authorized participant is able to step forward to create or redeem, Fund shares may trade at a premium or discount to NAV and possibly face trading halts and/or delisting. |
| Hartford Municipal Opportunities ETF | Hartford Municipal Opportunities ETF | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Management fees | rr_ManagementFeesOverAssets | 0.29% |
| Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | none |
| Other expenses | rr_OtherExpensesOverAssets | none |
| Total annual fund operating expenses | rr_ExpensesOverAssets | 0.29% |
| Year 1 | rr_ExpenseExampleYear01 | $ 30 |
| Year 3 | rr_ExpenseExampleYear03 | 93 |
| Year 5 | rr_ExpenseExampleYear05 | 163 |
| Year 10 | rr_ExpenseExampleYear10 | $ 368 |
| 2018 | rr_AnnualReturn2018 | 1.44% |
| 2019 | rr_AnnualReturn2019 | 7.87% |
| 2020 | rr_AnnualReturn2020 | 5.39% |
| 2021 | rr_AnnualReturn2021 | 1.95% |
| 2022 | rr_AnnualReturn2022 | (8.43%) |
| 2023 | rr_AnnualReturn2023 | 6.78% |
| Year to Date Return, Label | rr_YearToDateReturnLabel | <span style="font-family:Arial Narrow;font-size:10pt;margin-left:0.0pt;">year-to-date</span> |
| Bar Chart, Year to Date Return, Date | rr_BarChartYearToDateReturnDate | Sep. 30, 2024 |
| Bar Chart, Year to Date Return | rr_BarChartYearToDateReturn | 3.39% |
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | <span style="font-family:Arial;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Best Quarter Return</span> |
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Dec. 31, 2023 |
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 6.85% |
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | <span style="font-family:Arial;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Worst Quarter Return</span> |
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2022 |
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (6.01%) |
| Hartford Municipal Opportunities ETF | After Taxes on Distributions | Hartford Municipal Opportunities ETF | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| 1 Year | rr_AverageAnnualReturnYear01 | 6.71% |
| 5 Years | rr_AverageAnnualReturnYear05 | 2.34% |
| Since Inception | rr_AverageAnnualReturnSinceInception | 2.24% |
| Hartford Municipal Opportunities ETF | Return Before Taxes | Hartford Municipal Opportunities ETF | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| 1 Year | rr_AverageAnnualReturnYear01 | 6.78% |
| 5 Years | rr_AverageAnnualReturnYear05 | 2.54% |
| Since Inception | rr_AverageAnnualReturnSinceInception | 2.41% |
| Hartford Municipal Opportunities ETF | After Taxes on Distributions and Sale of Fund Shares | Hartford Municipal Opportunities ETF | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| 1 Year | rr_AverageAnnualReturnYear01 | 5.20% |
| 5 Years | rr_AverageAnnualReturnYear05 | 2.46% |
| Since Inception | rr_AverageAnnualReturnSinceInception | 2.35% |
| Hartford Municipal Opportunities ETF | Bloomberg Municipal Bond 1-15 Year Blend (1-17) Index (reflects no deduction for fees, expenses or taxes) | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| 1 Year | rr_AverageAnnualReturnYear01 | 5.26% |
| 5 Years | rr_AverageAnnualReturnYear05 | 2.17% |
| Since Inception | rr_AverageAnnualReturnSinceInception | 2.08% |
| Hartford Municipal Opportunities ETF | Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses or taxes) | ||
| Risk Return Abstract | rr_RiskReturnAbstract | |
| 1 Year | rr_AverageAnnualReturnYear01 | 6.40% |
| 5 Years | rr_AverageAnnualReturnYear05 | 2.25% |
| Since Inception | rr_AverageAnnualReturnSinceInception | 2.14% |