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Label Element Value
Franklin U.S. Large Cap Multifactor Index ETF  
Risk/Return: oef_RiskReturnAbstract  
Risk/Return [Heading] oef_RiskReturnHeading Franklin U.S. Large 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. Large Cap Equity Index (the U.S. Large Cap Underlying Index).

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.

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 53.07% of the average value of its portfolio.

Portfolio Turnover, Rate oef_PortfolioTurnoverRate 53.07%
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:

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. Large Cap Underlying Index. The U.S. Large Cap Underlying Index is a systematic, rules-based proprietary index maintained and calculated by FTSE Russell. The U.S. Large Cap Underlying Index is based on the Russell 1000® Index using a methodology developed with Franklin Templeton to reflect Franklin Templeton’s desired investment strategy. The Russell 1000® Index is a subset of the Russell 3000® Index and is designed to measure the performance of large capitalization stocks in the United States. It includes approximately 1,000 of the largest issuers based on a combination of their market cap and current index membership. As of May 31, 2025, the Russell 1000® Index represented approximately 95% of the total market capitalization of the Russell 3000® Index.

The U.S. Large Cap Underlying Index seeks to achieve a lower level of risk and higher risk-adjusted performance than the Russell 1000® Index over the long term by applying a multi-factor selection process, which is designed to select equity securities from the Russell 1000® Index that have favorable exposure to three investment style factors – quality, value and momentum. The “quality” factor incorporates measurements such as return on equity, earnings variability, cash return on assets, return on assets, operating cash flow to sales, and leverage. The “value” factor incorporates measurements such as price to book value, dividend yield, earnings yield, and forward earnings yield. The “momentum” factor incorporates measurements such as 6-month risk adjusted price momentum and 12-month risk adjusted price momentum. 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. In constructing the U.S. Large Cap Underlying Index, each security in the Russell 1000® Index with a weight of 1% or greater is selected for inclusion. The aggregate weight of these securities in the U.S. Large Cap Underlying Index will represent the same total weight as the sum of their benchmark weights. The remaining constituents of the Russell 1000® Index (i.e., securities with a weight of less than 1% of the benchmark) are assigned a composite factor score and the top 20% of such securities with the highest factor

scores are also selected for inclusion. The final weighting of all securities selected for inclusion in the U.S. Large Cap Underlying Index is determined based upon their benchmark weight multiplied by their composite factor score, subject to preestablished minimum and maximum weight constraints.

At the time of each quarterly reconstitution of the U.S. Large Cap Underlying Index, the maximum and minimum weight of each security included in the U.S. Large Cap Underlying Index will be capped at a limit based on the weight of the particular security in the Russell 1000® Index. The U.S. Large Cap Underlying Index is also constrained in its construction to limit turnover of constituent securities at each quarterly reconstitution. As of May 31, 2025, the U.S. Large Cap Underlying Index was comprised of 211 securities with capitalizations ranging from $1.89 billion to $3.42 trillion.

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. Large 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. Large Cap Underlying Index as closely as possible (i.e., invest in all of the component securities in their respective weightings in the U.S. Large Cap Underlying Index). However, under various circumstances, it may not be possible or practicable to replicate the U.S. Large 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. Large Cap Underlying Index, but may not track the U.S. Large Cap Underlying Index with the same degree of accuracy as would an investment vehicle replicating the entire U.S. Large 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. Large Cap Underlying Index, including securities that resemble those included in the U.S. Large 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 quarterly following the quarterly reconstitution of the U.S. Large 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. Large Cap Underlying Index is concentrated. As of May 31, 2025, the U.S. Large Cap Underlying Index was concentrated in the information technology sector.

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.

Performance Availability Phone [Text] oef_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
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
   

Best Quarter:

2020, Q2

16.80%

Worst Quarter:

2020, Q1

-20.81%

 

As of June 30, 2025, the Fund’s year-to-date return was 8.42%.

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. Large 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.

Franklin U.S. Large 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. Large 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.

Franklin U.S. Large 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. Large Cap Underlying Index will enhance performance. Exposure to such investment factors may detract from performance in some market environments, perhaps for extended periods.

Franklin U.S. Large Cap Multifactor Index ETF | Large Capitalization Companies  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Large Capitalization Companies: Large capitalization companies may fall out of favor with investors based on market and economic conditions. Large capitalization companies may underperform relative to small and mid capitalization companies because they may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes, and may not be able to attain

the high growth rate of successful smaller companies, especially during extended periods of economic expansion.

Franklin U.S. Large Cap Multifactor Index ETF | Calculation Methodology  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Calculation Methodology: The U.S. Large Cap Underlying Index relies on various sources of information to assess the criteria of issuers included in the U.S. Large 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. Large 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.

Franklin U.S. Large 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. Large Cap Underlying Index will be determined, composed or calculated accurately. While FTSE Russell provides descriptions of what the U.S. Large 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. Large 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. Large 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. Large Cap Underlying Index may therefore be borne by the Fund and its shareholders.

Franklin U.S. Large 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. Large 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. Large Cap Underlying Index. In addition, the Fund’s NAV may deviate from the U.S. Large Cap Underlying Index if the Fund fair values a portfolio security at a price other than the price used by the U.S. Large 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. Large Cap Underlying Index as well as it would have if the Fund held all of the securities in the U.S. Large Cap Underlying Index.

Franklin U.S. Large 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. Large 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. Large 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. Large 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. Large Cap Underlying Index does not.

Franklin U.S. Large 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.

Franklin U.S. Large 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.

Franklin U.S. Large Cap Multifactor Index ETF | Information technology companies  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Information technology companies: Companies in the information technology sector have historically been volatile due to the rapid pace of product change and development within the sector. For example, their products and services may not prove commercially successful or may become obsolete quickly. In addition, delays in or cancellation of the release of anticipated products or services may also affect the price of an information technology company’s stock. Information technology companies are subject to significant competitive pressures, such as new market entrants, aggressive pricing and tight profit margins. The activities of these companies may also be adversely affected by changes in government regulations, worldwide technological developments or investor perception of a company and/or its products or services. The stock prices of companies operating within this sector may be subject to abrupt or erratic movements.

Franklin U.S. Large Cap Multifactor Index ETF | Mid Capitalization Companies  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Mid Capitalization Companies: Securities issued by mid 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, mid 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 mid capitalization companies also tend to be less liquid than the markets for securities issued by larger companies.

Franklin U.S. Large 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.

Franklin U.S. Large 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. Large Cap Underlying Index, even if that security generally is underperforming.

Franklin U.S. Large 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.

Franklin U.S. Large 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.

Franklin U.S. Large 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.

Franklin U.S. Large 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. Large Cap Multifactor Index ETF | Russell 1000® Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Russell 1000® Index
Average Annual Return, Percent oef_AvgAnnlRtrPct 24.51%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.27%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.16% [1]
Performance Inception Date oef_PerfInceptionDate Apr. 26, 2017
Franklin U.S. Large Cap Multifactor Index ETF | LibertyQ U.S. Large Cap Equity Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel LibertyQ U.S. Large Cap Equity Index
Average Annual Return, Percent oef_AvgAnnlRtrPct 24.44%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.02%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.70% [1]
Performance Inception Date oef_PerfInceptionDate Apr. 26, 2017
Franklin U.S. Large Cap Multifactor Index ETF | Franklin U.S. Large Cap Multifactor Index ETF  
Risk/Return: oef_RiskReturnAbstract  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.15%
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 0.15%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 15
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 48
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 85
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 192
Year to Date Return, Label [Optional Text] oef_YearToDateReturnLabel As of June 30, 2025, the Fund’s year-to-date return was 8.42%.
Bar Chart, Year to Date Return, Date oef_BarChartYearToDateReturnDate Jun. 30, 2025
Bar Chart, Year to Date Return oef_BarChartYearToDateReturn 8.42%
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 16.80%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (20.81%)
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Return before taxes
Average Annual Return, Percent oef_AvgAnnlRtrPct 24.23%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.87%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.50% [1]
Annual Return [Percent] oef_AnnlRtrPct (1.96%)
Annual Return [Percent] oef_AnnlRtrPct 28.76%
Annual Return [Percent] oef_AnnlRtrPct 10.64%
Annual Return [Percent] oef_AnnlRtrPct 26.69%
Annual Return [Percent] oef_AnnlRtrPct (14.80%)
Annual Return [Percent] oef_AnnlRtrPct 23.46%
Annual Return [Percent] oef_AnnlRtrPct 24.23%
Performance Inception Date oef_PerfInceptionDate Apr. 26, 2017
Franklin U.S. Large Cap Multifactor Index ETF | Franklin U.S. Large 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 23.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.38%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.90% [1]
Performance Inception Date oef_PerfInceptionDate Apr. 26, 2017
Franklin U.S. Large Cap Multifactor Index ETF | Franklin U.S. Large 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 14.57%
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.19%
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.88% [1]
Performance Inception Date oef_PerfInceptionDate Apr. 26, 2017
[1]

Since inception April 26, 2017.