Label | Element | Value | ||||||||||||
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Franklin U.S. Small Cap Multifactor Index ETF | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk/Return [Heading] | oef_RiskReturnHeading | Franklin U.S. Small Cap Multifactor Index ETF | ||||||||||||
Objective [Heading] | oef_ObjectiveHeading | Investment Goal | ||||||||||||
Objective, Primary [Text Block] | oef_ObjectivePrimaryTextBlock | To seek to provide investment results that closely correspond, before fees and expenses, to the performance of the LibertyQ U.S. Small Cap Equity Index (the U.S. Small Cap Underlying Index). |
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Expense Heading [Optional Text] | oef_ExpenseHeading | Fees and Expenses of the Fund | ||||||||||||
Expense Narrative [Text Block] | oef_ExpenseNarrativeTextBlock | The following table describes the fees and expenses that you will incur if you buy, hold and sell shares of the Fund. You may also incur other fees, such as usual and customary brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and the Example that follows. |
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Operating Expenses Caption [Optional Text] | oef_OperatingExpensesCaption | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | ||||||||||||
Portfolio Turnover [Heading] | oef_PortfolioTurnoverHeading | Portfolio Turnover | ||||||||||||
Portfolio Turnover [Text Block] | oef_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 most recent fiscal year, the Fund's portfolio turnover rate was 24.22% of the average value of its portfolio. |
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Portfolio Turnover, Rate | oef_PortfolioTurnoverRate | 24.22% | ||||||||||||
Expense Example [Heading] | oef_ExpenseExampleHeading | Example | ||||||||||||
Expense Example Narrative [Text Block] | oef_ExpenseExampleNarrativeTextBlock | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell all of your shares at the end of the period. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
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Strategy [Heading] | oef_StrategyHeading | Principal Investment Strategies | ||||||||||||
Strategy Narrative [Text Block] | oef_StrategyNarrativeTextBlock | Under normal market conditions, the Fund invests at least 80% of its assets in the component securities of the U.S. Small Cap Underlying Index. The U.S. Small Cap Underlying Index is a systematic, rules-based proprietary index that is maintained and calculated by FTSE Russell. The U.S. Small Cap Underlying Index is based on the Russell 2000® Index using a methodology developed with Franklin Templeton to reflect Franklin Templeton’s desired investment strategy. The Russell 2000® Index is a subset of the Russell 3000® Index and is designed to measure the performance of small capitalization stocks in the United States. It includes approximately 2000 of the smallest issuers in the Russell 3000® Index. The U.S. Small Cap Underlying Index seeks to achieve a lower level of risk and higher risk-adjusted performance than the Russell 2000® Index over the long term by applying a multi-factor selection process, which is designed to select equity securities from the Russell 2000® Index that have favorable exposure to four investment style factors – quality, value, momentum and low volatility. Factors are common characteristics that relate to a group of issuers or securities that are important in explaining the returns and risks of those issuers’ securities. The “quality” factor incorporates measurements such as return on equity, gross profit over assets, cash return on assets, gross margin sustainability, and return on asset sustainability. The “value” factor incorporates measurements such as forward earnings yield, EBITDA to enterprise value, price to book value and dividend yield. The “momentum” factor incorporates measurements such as 6-month risk adjusted price momentum and 12-month risk-adjusted price momentum. The “low volatility” factor incorporates measurements such as historical beta (i.e., a measure of the volatility of a security relative to the total market). At the time of each semi-annual reconstitution of the U.S. Small Cap Underlying Index, no company shall comprise more than 1% of the U.S. Small Cap Underlying Index. The U.S. Small Cap Underlying Index is also constrained in its construction to limit turnover of constituent securities at each semi-annual reconstitution. As of May 31, 2025, the U.S. Small Cap Underlying Index was comprised of 486 securities with capitalizations ranging from $21 million to $16.97 billion. The Fund, using a “passive” or indexing investment approach, seeks investment results that closely correspond, before fees and expenses, to the performance of the U.S. Small Cap Underlying Index. The Fund may use either a replication strategy or representative sampling strategy. Under a replication strategy, the Fund will replicate the component securities of the U.S. Small Cap Underlying Index as closely as possible (i.e., invest in all of the component securities in their respective weightings in the U.S. Small Cap Underlying Index). However, under various circumstances, it may not be possible or practicable to replicate the U.S. Small Cap Underlying Index. In these circumstances, the Fund may use a “representative sampling” strategy whereby the Fund would invest in what it believes to be a representative sample of the component securities of the U.S. Small Cap Underlying Index, but may not track the U.S. Small Cap Underlying Index with the same degree of accuracy as would an investment vehicle replicating the entire U.S. Small Cap Underlying Index. Under the representative sampling technique, the investment manager will select securities that collectively have an investment profile similar to that of the U.S. Small Cap Underlying Index, including securities that resemble those included in the U.S. Small Cap Underlying Index in terms of risk factors, performance attributes and other characteristics, such as market capitalization and industry weightings. The Fund’s portfolio is reconstituted semi-annually following the semi-annual reconstitution of the U.S. Small Cap Underlying Index. The Fund may invest in equity futures (including equity index futures) and equity total return swaps to provide additional opportunities to add value and better track the performance of the Fund’s Underlying Index, such as to equitize cash and accrued income (i.e., gain equity market exposure and maintain liquidity until the Fund invests in individual securities), simulate investments in the Underlying Index, facilitate trading or minimize transaction costs. The Fund will concentrate its investments (i.e., hold 25% or more of its net assets) in a particular industry or group of industries to approximately the same extent that the U.S. Small Cap Underlying Index is concentrated. |
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Strategy Portfolio Concentration [Text] | oef_StrategyPortfolioConcentration | Under normal market conditions, the Fund invests at least 80% of its assets in the component securities of the U. | ||||||||||||
Bar Chart and Performance Table [Heading] | oef_BarChartAndPerformanceTableHeading | Performance | ||||||||||||
Performance Narrative [Text Block] | oef_PerformanceNarrativeTextBlock | The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance, an additional index and the Fund's underlying index. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You can obtain updated performance information at www.franklintempleton.com or by calling (800) DIAL BEN/342-5236. |
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Performance Availability Website Address [Text] | oef_PerformanceAvailabilityWebSiteAddress | franklintempleton.com | ||||||||||||
Performance Past Does Not Indicate Future [Text] | oef_PerformancePastDoesNotIndicateFuture | The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | ||||||||||||
Bar Chart [Heading] | oef_BarChartHeading | Annual Total Returns | ||||||||||||
Bar Chart Closing [Text Block] | oef_BarChartClosingTextBlock |
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Performance Table Heading | oef_PerformanceTableHeading | Average Annual Total Returns For periods ended December 31, 2024 | ||||||||||||
Index No Deduction for Fees, Expenses, or Taxes [Text] | oef_IndexNoDeductionForFeesExpensesTaxes | (index reflects no deduction for fees, expenses or taxes) | ||||||||||||
Franklin U.S. Small Cap Multifactor Index ETF | Principal Risks | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Principal Risks You could lose money by investing in the Fund. Exchange-traded fund (ETF) shares are not deposits or obligations of, or guaranteed or endorsed by, any bank, and are not insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board, or any other agency of the U.S. government. The Fund is subject to the principal risks noted below, any of which may adversely affect the Fund’s net asset value (NAV), trading price, yield, total return and ability to meet its investment goal. |
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Franklin U.S. Small Cap Multifactor Index ETF | Risk Lose Money [Member] | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | You could lose money by investing in the Fund. | ||||||||||||
Franklin U.S. Small Cap Multifactor Index ETF | Market | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Market: The market values of securities or other investments owned by the Fund will go up or down, sometimes rapidly or unpredictably. The market value of a security or other investment may be reduced by market activity or other results of supply and demand unrelated to the issuer. This is a basic risk associated with all investments. When there are more sellers than buyers, prices tend to fall. Likewise, when there are more buyers than sellers, prices tend to rise. In addition, the value of the Fund’s investments may go up or down due to general market or other conditions that are not specifically related to a particular issuer, such as: real or perceived adverse economic changes, including widespread liquidity issues and defaults in one or more industries; changes in interest, inflation or exchange rates; unexpected natural and man-made world events, such as diseases or disasters; financial, political or social disruptions, including terrorism and war; and U.S. trade disputes or other disputes with specific countries that could result in additional tariffs, trade barriers and/or investment restrictions in certain securities in those countries. Any of these conditions can adversely affect the economic prospects of many companies, sectors, nations, regions and the market in general, in ways that cannot necessarily be foreseen. Stock prices tend to go up and down more dramatically than those of debt securities. A slower-growth or recessionary economic environment could have an adverse effect on the prices of the various stocks held by the Fund. |
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Franklin U.S. Small Cap Multifactor Index ETF | Investment Style Factors | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Investment Style Factors: There can be no assurance that the multi-factor stock selection process of the U.S. Small Cap Underlying Index will enhance performance. Exposure to such investment factors may detract from performance in some market environments, perhaps for extended periods. |
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Franklin U.S. Small Cap Multifactor Index ETF | Small Capitalization Companies | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Small Capitalization Companies: Securities issued by small capitalization companies may be more volatile in price than those of larger companies and may involve substantial risks. Such risks may include greater sensitivity to economic conditions, less certain growth prospects, lack of depth of management and funds for growth and development, and limited or less developed product lines and markets. In addition, small capitalization companies may be particularly affected by interest rate increases, as they may find it more difficult to borrow money to continue or expand operations, or may have difficulty in repaying any loans. The markets for securities issued by small capitalization companies also tend to be less liquid than the markets for securities issued by larger companies. |
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Franklin U.S. Small Cap Multifactor Index ETF | Calculation Methodology | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Calculation Methodology: The U.S. Small Cap Underlying Index relies on various sources of information to assess the criteria of issuers included in the U.S. Small Cap Underlying Index (or the FTSE Russell index on which it is based), including information that may be based on assumptions and estimates. Neither the Fund nor the investment manager can offer assurances that the U.S. Small Cap Underlying Index's calculation methodology or sources of information will provide an accurate assessment of included issuers or that the included issuers will provide the Fund with the market exposure it seeks. |
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Franklin U.S. Small Cap Multifactor Index ETF | Index-Related | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Index-Related: There is no assurance that the U.S. Small Cap Underlying Index will be determined, composed or calculated accurately. While FTSE Russell provides descriptions of what the U.S. Small Cap Underlying Index is designed to achieve, FTSE Russell does not guarantee the quality, accuracy or completeness of data in respect of its indices, and does not guarantee that the U.S. Small Cap Underlying Index will be in line with the described index methodology. Errors in index data, index computations or the construction of the U.S. Small Cap Underlying Index in accordance with its methodology (including as a result of outdated, unreliable or unavailable market information) may occur and may not be identified and corrected by the index provider for a period of time or at all, which may have an adverse impact on the Fund and its shareholders. Gains, losses or costs to the Fund caused by errors in the U.S. Small Cap Underlying Index may therefore be borne by the Fund and its shareholders. |
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Franklin U.S. Small Cap Multifactor Index ETF | Non-Correlation | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Non-Correlation: There is no guarantee that the Fund will achieve a high degree of correlation to the U.S. Small Cap Underlying Index and therefore achieve its investment goal. Market disruptions and regulatory restrictions could have an adverse effect on the Fund’s ability to adjust its exposure to the required levels in order to track the U.S. Small Cap Underlying Index. In addition, the Fund’s NAV may deviate from the U.S. Small Cap Underlying Index if the Fund fair values a portfolio security at a price other than the price used by the U.S. Small Cap Underlying Index for that security. To the extent that the investment manager uses a representative sampling strategy, the Fund may not track the return of the U.S. Small Cap Underlying Index as well as it would have if the Fund held all of the securities in the U.S. Small Cap Underlying Index. |
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Franklin U.S. Small Cap Multifactor Index ETF | Tracking Error | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Tracking Error: Tracking error is the divergence of the Fund’s performance from that of the U.S. Small Cap Underlying Index. Tracking error may occur because of differences between the securities held in the Fund’s portfolio and those included in the U.S. Small Cap Underlying Index, pricing differences, transaction costs, the Fund’s holding of cash, differences in timing of the accrual of dividends or interest, tax gains or losses, changes to the U.S. Small Cap Underlying Index or the need to meet various new or existing regulatory requirements. This risk may be heightened during times of increased market volatility or other unusual market conditions. Tracking error also may result because the Fund incurs fees and expenses, while the U.S. Small Cap Underlying Index does not. |
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Franklin U.S. Small Cap Multifactor Index ETF | Market Trading | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Market Trading: The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, periods of high volatility and disruption in the creation/redemption process of the Fund. Any of these factors, among others, may lead to the Fund’s shares trading at a premium or discount to NAV. Thus, you may pay more (or less) than NAV when you buy shares of the Fund in the secondary market, and you may receive less (or more) than NAV when you sell those shares in the secondary market. The investment manager cannot predict whether shares will trade above (premium), below (discount) or at NAV. |
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Franklin U.S. Small Cap Multifactor Index ETF | Concentration | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Concentration: To the extent the Fund concentrates in a specific industry, a group of industries, sector or type of investment, the Fund will carry much greater risks of adverse developments and price movements in such industries, sectors or investments than a fund that invests in a wider variety of industries, sectors or investments. There is also the risk that the Fund will perform poorly during a slump in demand for securities of companies in such industries or sectors. |
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Franklin U.S. Small Cap Multifactor Index ETF | Derivative Instruments | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Derivative Instruments: The performance of derivative instruments depends largely on the performance of an underlying security, interest rate or index, and such derivatives often have risks similar to the underlying instrument, in addition to other risks. Derivatives involve costs and can create economic leverage in the Fund’s portfolio which may result in significant volatility and cause the Fund to participate in losses (as well as gains) in an amount that significantly exceeds the Fund’s initial investment. Other risks include illiquidity, mispricing or improper valuation of the derivative, and imperfect correlation between the value of the derivative and the underlying instrument so that the Fund may not realize the intended benefits and may experience increased tracking error. Their successful use will usually depend on the investment manager’s ability to accurately forecast movements in the market relating to the underlying instrument. Should a market or markets, or prices of particular classes of investments move in an unexpected manner, especially in unusual or extreme market conditions, the Fund may not realize the anticipated benefits of the transaction, and it may realize losses, which could be significant. If the investment manager is not successful in using such derivative instruments, the Fund’s performance may be worse than if the investment manager did not use such derivatives at all. When a derivative is used for hedging, the change in value of the derivative may also not correlate specifically with the security, interest rate, index or other risk being hedged. Derivatives also may present the risk that the other party to the transaction will fail to perform. There is also the risk, especially under extreme market conditions, that a derivative, which usually would operate as a hedge, provides no hedging benefits at all. |
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Franklin U.S. Small Cap Multifactor Index ETF | Passive Investment | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Passive Investment: Unlike many investment companies, the Fund is not actively managed and the investment manager does not attempt to take defensive positions under any market conditions, including declining markets. Therefore, the investment manager would not necessarily buy or sell a security unless that security is added or removed, respectively, from the U.S. Small Cap Underlying Index, even if that security generally is underperforming. |
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Franklin U.S. Small Cap Multifactor Index ETF | Authorized Participant Concentration | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Authorized Participant Concentration: Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. "Authorized Participants" are broker-dealers that are permitted to create and redeem shares directly with the Fund and who have entered into agreements with the Fund’s distributor. The Fund has a limited number of institutions that act as Authorized Participants. To the extent that these institutions exit the business or are unable 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 Creation Units (as defined below), Fund shares may trade at a discount to NAV and possibly face trading halts and/or delisting. This risk may be more pronounced in volatile markets, potentially where there are significant redemptions in ETFs generally. |
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Franklin U.S. Small Cap Multifactor Index ETF | Small Fund | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Small Fund: When the Fund's size is small, the Fund may experience low trading volume and wide bid-ask spreads. In addition, the Fund may face the risk of being delisted if the Fund does not meet certain conditions of the listing exchange. |
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Franklin U.S. Small Cap Multifactor Index ETF | Large Shareholder | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Large Shareholder: Certain large shareholders, including other funds or accounts advised by the investment manager, sub-advisor or an affiliate of the investment manager or sub-advisor, may from time to time own a substantial amount of the Fund’s shares. In addition, a third-party investor, the investment manager, sub-advisor or an affiliate of the investment manager or sub-advisor, an authorized participant, a lead market maker, or another entity may invest in the Fund and hold its investment for a limited period of time solely to facilitate commencement of the Fund or to facilitate the Fund’s achieving a specified size or scale. There can be no assurance that any large shareholder would not redeem its investment, that the size of the Fund would be maintained at such levels or that the Fund would continue to meet applicable listing requirements. Redemptions by large shareholders could have a significant negative impact on the Fund. In addition, transactions by large shareholders may account for a large percentage of the trading volume on the listing exchange and may, therefore, have a material upward or downward effect on the market price of the shares. |
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Franklin U.S. Small Cap Multifactor Index ETF | Cybersecurity | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Risk [Text Block] | oef_RiskTextBlock | Cybersecurity: Cybersecurity incidents, both intentional and unintentional, may allow an unauthorized party to gain access to Fund assets, Fund or customer data (including private shareholder information), or proprietary information, cause the Fund, the investment manager, authorized participants, or index providers (as applicable) and listing exchanges, and/or their service providers (including, but not limited to, Fund accountants, custodians, sub-custodians, transfer agents and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality or prevent Fund investors from purchasing, redeeming shares or receiving distributions. The investment manager has limited ability to prevent or mitigate cybersecurity incidents affecting third party service providers, and such third party service providers may have limited indemnification obligations to the Fund or the investment manager. Cybersecurity incidents may result in financial losses to the Fund and its shareholders, and substantial costs may be incurred in an effort to prevent or mitigate future cybersecurity incidents. Issuers of securities in which the Fund invests are also subject to cybersecurity risks, and the value of these securities could decline if the issuers experience cybersecurity incidents. Because technology is frequently changing, new ways to carry out cyber attacks are always developing. Therefore, there is a chance that some risks have not been identified or prepared for, or that an attack may not be detected, which puts limitations on the Fund's ability to plan for or respond to a cyber attack. Like other funds and business enterprises, the Fund, the investment manager, and their service providers are subject to the risk of cyber incidents occurring from time to time. |
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Franklin U.S. Small Cap Multifactor Index ETF | Russell 3000® Index | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | Russell 3000® Index | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 23.81% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 13.86% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 13.73% | [1] | |||||||||||
Performance Inception Date | oef_PerfInceptionDate | Apr. 26, 2017 | ||||||||||||
Franklin U.S. Small Cap Multifactor Index ETF | Russell 2000® Index | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | Russell 2000® Index | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 11.54% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 7.40% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 7.50% | [1] | |||||||||||
Performance Inception Date | oef_PerfInceptionDate | Apr. 26, 2017 | ||||||||||||
Franklin U.S. Small Cap Multifactor Index ETF | LibertyQ U.S. Small Cap Equity Index | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | LibertyQ U.S. Small Cap Equity Index | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 9.07% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 9.12% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.46% | [1] | |||||||||||
Performance Inception Date | oef_PerfInceptionDate | Apr. 26, 2017 | ||||||||||||
Franklin U.S. Small Cap Multifactor Index ETF | Franklin U.S. Small Cap Multifactor Index ETF | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.35% | ||||||||||||
Distribution and Service (12b-1) Fees | oef_DistributionAndService12b1FeesOverAssets | 0.00% | ||||||||||||
Other Expenses (as a percentage of Assets): | oef_OtherExpensesOverAssets | 0.00% | ||||||||||||
Expenses (as a percentage of Assets) | oef_ExpensesOverAssets | 0.35% | ||||||||||||
Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 36 | ||||||||||||
Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 113 | ||||||||||||
Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 197 | ||||||||||||
Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | $ 443 | ||||||||||||
Year to Date Return, Label [Optional Text] | oef_YearToDateReturnLabel | As of June 30, 2025, the Fund’s year-to-date return was -0.91%. | ||||||||||||
Bar Chart, Year to Date Return, Date | oef_BarChartYearToDateReturnDate | Jun. 30, 2025 | ||||||||||||
Bar Chart, Year to Date Return | oef_BarChartYearToDateReturn | (0.91%) | ||||||||||||
Highest Quarterly Return, Label [Optional Text] | oef_HighestQuarterlyReturnLabel | Best Quarter | ||||||||||||
Highest Quarterly Return, Date | oef_BarChartHighestQuarterlyReturnDate | Dec. 31, 2020 | ||||||||||||
Highest Quarterly Return | oef_BarChartHighestQuarterlyReturn | 24.14% | ||||||||||||
Lowest Quarterly Return, Label [Optional Text] | oef_LowestQuarterlyReturnLabel | Worst Quarter | ||||||||||||
Lowest Quarterly Return, Date | oef_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | ||||||||||||
Lowest Quarterly Return | oef_BarChartLowestQuarterlyReturn | (29.82%) | ||||||||||||
Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | Return before taxes | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.66% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.77% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.12% | [1] | |||||||||||
Annual Return [Percent] | oef_AnnlRtrPct | (4.56%) | ||||||||||||
Annual Return [Percent] | oef_AnnlRtrPct | 18.21% | ||||||||||||
Annual Return [Percent] | oef_AnnlRtrPct | 10.27% | ||||||||||||
Annual Return [Percent] | oef_AnnlRtrPct | 26.62% | ||||||||||||
Annual Return [Percent] | oef_AnnlRtrPct | (16.80%) | ||||||||||||
Annual Return [Percent] | oef_AnnlRtrPct | 20.61% | ||||||||||||
Annual Return [Percent] | oef_AnnlRtrPct | 8.66% | ||||||||||||
Performance Inception Date | oef_PerfInceptionDate | Apr. 26, 2017 | ||||||||||||
Franklin U.S. Small Cap Multifactor Index ETF | Franklin U.S. Small Cap Multifactor Index ETF | After Taxes on Distributions | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | Return after taxes on distributions | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.32% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.42% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 7.68% | [1] | |||||||||||
Performance Inception Date | oef_PerfInceptionDate | Apr. 26, 2017 | ||||||||||||
Franklin U.S. Small Cap Multifactor Index ETF | Franklin U.S. Small Cap Multifactor Index ETF | After Taxes on Distributions and Sales | ||||||||||||||
Risk/Return: | oef_RiskReturnAbstract | |||||||||||||
Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | Return after taxes on distributions and sale of Fund shares | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 5.36% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 6.87% | ||||||||||||
Average Annual Return, Percent | oef_AvgAnnlRtrPct | 6.37% | [1] | |||||||||||
Performance Inception Date | oef_PerfInceptionDate | Apr. 26, 2017 | ||||||||||||
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