| Label | Element | Value |
|---|---|---|
| Franklin Multisector Income ETF | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk/Return [Heading] | oef_RiskReturnHeading | Franklin Multisector Income ETF |
| Objective [Heading] | oef_ObjectiveHeading | Investment Goal |
| Objective, Primary [Text Block] | oef_ObjectivePrimaryTextBlock | To seek to provide a high level of current income. Capital appreciation over the long term is a secondary goal. |
| 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 period from August 26, 2025 (commencement of operations) to March 31, 2026, the Fund's portfolio turnover rate was 103% of the average value of its portfolio. |
| Portfolio Turnover, Rate | oef_PortfolioTurnoverRate | 103.00% |
| 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 in a diversified portfolio of U.S. and foreign debt securities across multiple fixed income sectors. Debt securities include all varieties of fixed, variable and floating rate income securities, including bonds, U.S. and foreign government and agency securities, corporate loans (and loan participations) and mortgage-backed securities and other asset-backed securities. “Multisector Income” in the Fund’s name refers to the Fund’s strategy of seeking to maximize current income by allocating portfolio investments opportunistically across different fixed income market sectors. The debt securities in which the Fund invests include all varieties of fixed, floating and variable rate instruments, including secured and unsecured bonds, senior floating rate and term loans, mortgage-backed securities and other asset-backed securities, debentures, and shorter-term instruments. The Fund may invest in many different securities issued or guaranteed by the U.S. government or by non-U.S. governments, or their respective agencies or instrumentalities, including mortgage-backed securities and inflation-indexed securities issued by the U.S. Treasury. Mortgage-backed securities represent an interest in a pool of mortgage loans made by banks and other financial institutions to finance purchases of homes, commercial buildings and other real estate. The individual mortgage loans are packaged or “pooled” together for sale to investors. As the underlying mortgage loans are paid off, investors receive principal and interest payments. These securities may be fixed-rate or adjustable-rate mortgage-backed securities (ARMS). The Fund also invests in other types of mortgage securities that may be issued or guaranteed by private issuers including commercial mortgage-backed securities (CMBS), collateralized mortgage obligations (CMOs) and residential mortgage-backed securities (RMBS). The Fund may purchase or sell mortgage-backed securities on a delayed delivery or forward commitment basis through the “to-be-announced” (TBA) market. With TBA transactions, the particular securities to be delivered must meet specified terms and standards. The Fund may invest in mortgage dollar rolls. In a mortgage dollar roll, the Fund sells (or buys) mortgage securities for delivery on a specified date and simultaneously contracts to repurchase (or sell) substantially similar (same type, coupon, and maturity) securities on a future date. The Fund may invest in asset-backed securities. An asset-backed security is a security backed by loans, leases, and other receivables. The Fund may invest in collateralized debt obligations (CDOs), including collateralized loan obligations (CLOs). The Fund may invest without limit in developing or emerging markets. Bonds may be denominated and issued in the local currency or in another currency. The Fund may invest in debt securities of any maturity or duration, and the average maturity or duration of debt securities in the Fund’s portfolio will fluctuate depending on the investment manager’s outlook on changing market, economic, and political conditions. The Fund may also invest a portion of its assets in cash or cash equivalents. The Fund may invest in debt securities that are rated below investment grade (also known as “junk bonds”). The Fund may buy both rated and unrated debt securities, including securities rated below B by S&P® Global Ratings (S&P) or Moody's Ratings (Moody's) (or deemed comparable by the Fund’s investment manager). The Fund shifts its investments among various categories of debt securities (for example, government, corporate, securitized or asset backed debt) and at any given time may have a substantial amount of its assets invested in any category of debt security. For purposes of pursuing its investment goals, the Fund may, from time to time, use a variety of interest rate and credit-related derivatives, including interest rate, fixed income total return and credit default swaps and interest rate and/ or bond futures contracts and related options. The Fund also may, from time to time, use various currency-related derivatives, including currency and cross currency forwards, currency swaps, currency futures contracts and currency options. The use of these derivative transactions may allow the Fund to obtain net long or net short exposures to selected currencies, interest rates, countries, durations or credit risks. These derivative instruments may also be used for hedging purposes, to enhance Fund returns or to obtain exposure to various market sectors. In choosing investments for the Fund, the investment manager selects securities in various market sectors based on its assessment of changing economic, market, industry and issuer conditions. The investment manager uses a “top-down” analysis of macroeconomic trends, combined with a “bottom-up” fundamental analysis of market sectors, industries and issuers, to try to take advantage of varying sector reactions to economic events. The investment manager may consider selling a security when it believes the security has become fully valued due to either its price appreciation or changes in the issuer’s fundamentals, or when the investment manager believes another security is a more attractive investment opportunity. |
| Strategy Portfolio Concentration [Text] | oef_StrategyPortfolioConcentration | Under normal market conditions, the Fund invests in a diversified portfolio of U.S. and foreign debt securities across multiple fixed income sectors. |
| Bar Chart and Performance Table [Heading] | oef_BarChartAndPerformanceTableHeading | Performance |
| Performance Narrative [Text Block] | oef_PerformanceNarrativeTextBlock | Because the Fund does not have a full calendar year of performance, annual total return information is not available and therefore is not presented. You can obtain updated performance information at www.franklintempleton.com or by calling (800) DIAL BEN/342-5236. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. |
| Performance One Year or Less [Text] | oef_PerformanceOneYearOrLess | Because the Fund does not have a full calendar year of performance, annual total return information is not available and therefore is not presented. You can obtain updated performance information at www.franklintempleton.com or by calling (800) DIAL BEN/342-5236. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. |
| 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. |
| Franklin Multisector Income ETF | Principal Risks | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | You could lose money by investing in the 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. Unlike many ETFs, the Fund is not an index-based ETF. |
| Franklin Multisector Income ETF | Risk Lose Money [Member] | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | You could lose money by investing in the Fund. |
| Franklin Multisector Income ETF | Interest Rate | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Interest Rate: When interest rates rise, debt security prices generally fall. The opposite is also generally true: debt security prices rise when interest rates fall. Interest rate changes are influenced by a number of factors, including government policy, monetary policy, inflation expectations, perceptions of risk, and supply of and demand for bonds. In general, securities with longer maturities or durations are more sensitive to interest rate changes. |
| Franklin Multisector Income ETF | Credit | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Credit: An issuer of debt securities may fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer's financial strength or in a security's or government's credit rating may affect a security's value. |
| Franklin Multisector Income ETF | Income | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Income: The Fund's distributions to shareholders may decline when prevailing interest rates fall, when the Fund experiences defaults on debt securities it holds or when the Fund realizes a loss upon the sale of a debt security. |
| Franklin Multisector Income ETF | High-Yield Debt Instruments | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | High-Yield Debt Instruments: Issuers of lower-rated or “high-yield” debt instruments (also known as “junk bonds”) and lower-rated or high yield loans are not as strong financially as those issuing higher credit quality debt instruments. High-yield debt instruments are generally considered predominantly speculative by the applicable rating agencies as their issuers are more likely to encounter financial difficulties because they may be more highly leveraged, or because of other considerations. In addition, high yield debt instruments generally are more vulnerable to changes in the relevant economy, such as a recession or a sustained period of rising interest rates, that could affect their ability to make interest and principal payments when due. The prices of high-yield debt instruments generally fluctuate more than those of higher credit quality. High-yield debt instruments are generally more illiquid (harder to sell) and harder to value. |
| Franklin Multisector Income 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 instrument, such as a currency, security, interest rate or index, and such instruments often have risks similar to their underlying instrument, in addition to other risks. Derivative instruments 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 exceeds the Fund's initial investment. Other risks include illiquidity, mispricing or improper valuation of the derivative instrument, and imperfect correlation between the value of the derivative and the underlying instrument so that the Fund may not realize the intended benefits. When a derivative is used for hedging, the change in value of the derivative may also not correlate specifically with the currency, security, interest rate, index or other risk being hedged. With over-the-counter derivatives, there is the risk that the other party to the transaction will fail to perform. |
| Franklin Multisector Income ETF | Mortgage Securities and Asset-Backed Securities | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Mortgage Securities and Asset-Backed Securities: Mortgage securities differ from conventional debt securities because principal is paid back periodically over the life of the security rather than at maturity. The Fund may receive unscheduled payments of principal due to voluntary prepayments, refinancings or foreclosures on the underlying mortgage loans. Because of prepayments, mortgage securities may be less effective than some other types of debt securities as a means of "locking in" long-term interest rates and may have less potential for capital appreciation during periods of falling interest rates. A reduction in the anticipated rate of principal prepayments, especially during periods of rising interest rates, may increase or extend the effective maturity and duration of mortgage securities, making them more sensitive to interest rate changes, subject to greater price volatility, and more susceptible than some other debt securities to a decline in market value when interest rates rise. |
| Franklin Multisector Income ETF | Foreign Securities (non-U.S.) | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Foreign Securities (non-U.S.): Investing in foreign securities typically involves different risks than investing in U.S. securities, and includes risks associated with: (i) internal and external political and economic developments – e.g., the political, economic and social policies and structures of some foreign countries may be less stable and more volatile than those in the U.S. or some foreign countries may be subject to trading restrictions or economic sanctions; diplomatic and political developments could affect the economies, industries, and securities and currency markets of the countries in which the Fund is invested, which can include rapid and adverse political changes; social instability; regional conflicts; sanctions imposed by the United States, other nations or other governmental entities, including supranational entities; terrorism; and war; (ii) trading practices – e.g., government supervision and regulation of foreign securities and currency markets, trading systems and brokers may be less than in the U.S.; (iii) availability of information – e.g., foreign issuers may not be subject to the same disclosure, accounting and financial reporting standards and practices as U.S. issuers; (iv) limited markets – e.g., the securities of certain foreign issuers may be less liquid (harder to sell) and more volatile; and (v) currency exchange rate fluctuations and policies – e.g., fluctuations may negatively affect investments denominated in foreign currencies and any income received or expenses paid by the Fund in that foreign currency. The risks of foreign investments may be greater in developing or emerging market countries. |
| Franklin Multisector Income ETF | Developing Market Countries | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Developing Market Countries: The Fund’s investments in securities of issuers in developing market countries are subject to all of the risks of foreign investing generally, and have additional heightened risks due to a lack of established legal, political, business and social frameworks to support securities markets, including: delays in settling portfolio securities transactions; currency and capital controls; greater sensitivity to interest rate changes; pervasiveness of corruption and crime; currency exchange rate volatility; and inflation, deflation or currency devaluation. |
| Franklin Multisector Income ETF | Sovereign Debt Securities | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Sovereign Debt Securities: Sovereign debt securities are subject to various risks in addition to those relating to debt securities and foreign investments generally, including, but not limited to, the risk that a governmental entity may be unwilling or unable to pay interest and repay principal on its sovereign debt, or otherwise meet its obligations when due because of cash flow problems, insufficient foreign reserves, the relative size of the debt service burden to the economy as a whole, the government’s policy towards principal international lenders such as the International Monetary Fund, or the political considerations to which the government may be subject. If a sovereign debtor defaults (or threatens to default) on its sovereign debt obligations, the indebtedness may be restructured. Some sovereign debtors have in the past been able to restructure their debt payments without the approval of some or all debt holders or to declare moratoria on payments. In the event of a default on sovereign debt, the Fund may also have limited legal recourse against the defaulting government entity. |
| Franklin Multisector Income ETF | Focus | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Focus: To the extent that the Fund focuses on particular countries, regions, industries, sectors or types of investments from time to time, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of countries, regions, industries, sectors or investments. |
| Franklin Multisector Income ETF | Prepayment | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Prepayment: Prepayment risk occurs when a debt security can be repaid in whole or in part prior to the security's maturity and the Fund must reinvest the proceeds it receives, during periods of declining interest rates, in securities that pay a lower rate of interest. Also, if a security has been purchased at a premium, the value of the premium would be lost in the event of prepayment. Prepayments generally increase when interest rates fall. |
| Franklin Multisector Income ETF | Extension | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Extension: Some debt securities are subject to the risk that the debt security’s effective maturity is extended because calls or prepayments are less or slower than anticipated, particularly when interest rates rise. The market value of such security may then decline and become more interest rate sensitive. |
| Franklin Multisector Income ETF | Collateralized Debt Obligations (CDOs) | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Collateralized Debt Obligations (CDOs): The risks of an investment in a CDO, a type of asset backed security, and which includes collateralized loan obligations, depend largely on the type of collateral held by the special purpose entity (SPE) and the tranche of the CDO in which the Fund invests and may be affected by the performance of a CDO's collateral manager. CDOs may be deemed to be illiquid and subject to the Fund’s restrictions on investments in illiquid investments. In addition to the normal risks associated with debt securities and asset backed securities (e.g., interest rate risk, credit risk and default risk), CDOs carry additional risks including, but not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; (ii) the quality of the collateral may decline in value or quality or go into default or be downgraded; (iii) the Fund may invest in tranches of a CDO that are subordinate to other classes; and (iv) the complex structure of the security may not be fully understood at the time of investment. These risks are amplified in tranches of CDOs that are subordinate to other tranches. |
| Franklin Multisector Income ETF | Inflation-Indexed Securities | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Inflation-Indexed Securities: Inflation-indexed securities have a tendency to react to changes in real interest rates. Real interest rates represent nominal (stated) interest rates lowered by the anticipated effect of inflation. In general, the price of an inflation-indexed security decreases when real interest rates increase, and increases when real interest rates decrease. Interest payments on inflation-indexed securities will fluctuate as the principal and/or interest is adjusted for inflation and can be unpredictable. Any increase in the principal amount of an inflation-protected debt security will be considered taxable ordinary income, even though investors, such as the Fund, do not receive their principal until maturity. |
| Franklin Multisector Income ETF | Floating Rate Corporate Investments | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Floating Rate Corporate Investments: Floating rate corporate loans and corporate debt securities generally have credit ratings below investment grade and may be subject to resale restrictions. They are often issued in connection with highly leveraged transactions, and may be subject to greater credit risks than other investments including the possibility of default or bankruptcy. In addition, a secondary market in corporate loans may be subject to irregular trading activity, wide bid/ask spreads and extended trade settlement periods, which may impair the ability to accurately value existing and prospective investments and to realize in a timely fashion the full value upon the sale of a corporate loan. A significant portion of floating rate investments may be “covenant lite” loans that may contain fewer or less restrictive constraints on the borrower or other borrower-friendly characteristics. |
| Franklin Multisector Income ETF | Variable Rate Securities | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Variable Rate Securities: Because changes in interest rates on variable rate securities (including floating rate securities) may lag behind changes in market rates, the value of such securities may decline during periods of rising interest rates until their interest rates reset to market rates. During periods of declining interest rates, because the interest rates on variable rate securities generally reset downward, their market value is unlikely to rise to the same extent as the value of comparable fixed rate securities. |
| Franklin Multisector Income ETF | When-Issued and Delayed Delivery Transactions | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | When-Issued and Delayed Delivery Transactions: Mortgage-backed securities may be issued on a when-issued or delayed delivery basis, where payment and delivery take place at a future date. Because the market price of the security may fluctuate during the time before payment and delivery, the Fund assumes the risk that the value of the security at delivery may be more or less than the purchase price. |
| Franklin Multisector Income ETF | Mortgage Dollar Rolls | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Mortgage Dollar Rolls: In a mortgage dollar roll, the Fund takes the risk that: the market price of the mortgage-backed securities will drop below their future repurchase price; the securities that it repurchases at a later date will have less favorable market characteristics; the other party to the agreement will not be able to perform; the roll adds leverage to the Fund's portfolio; and, it increases the Fund's sensitivity to interest rate changes. In addition, investment in mortgage dollar rolls may increase the portfolio turnover rate for the Fund. |
| Franklin Multisector Income ETF | Inflation | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Inflation: The market price of debt securities generally falls as inflation increases because the purchasing power of the future income and repaid principal is expected to be worth less when received by the Fund. Debt securities that pay a fixed rather than variable interest rate are especially vulnerable to inflation risk because variable-rate debt securities may be able to participate, over the long term, in rising interest rates which have historically corresponded with long-term inflationary trends. |
| Franklin Multisector Income ETF | Liquidity | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Liquidity: The trading market for a particular security or type of security or other investments in which the Fund invests may become less liquid or even illiquid. Reduced liquidity will have an adverse impact on the Fund’s ability to sell such securities or other investments when necessary to meet the Fund’s liquidity needs or in response to a specific economic event and will also generally lower the value of a security or other investments. Market prices for such securities or other investments may be volatile. |
| Franklin Multisector Income ETF | Cash/Cash Equivalents | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Cash/Cash Equivalents: To the extent the Fund holds cash or cash equivalents rather than securities in which it primarily invests or uses to manage risk, the Fund may not achieve its investment objectives and may underperform. |
| Franklin Multisector Income 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. Ongoing or threatened armed conflicts throughout the world have caused and could continue to cause significant market disruptions and volatility. The hostilities and sanctions resulting from those hostilities could have a significant adverse impact on certain investments of the Fund as well as the Fund’s performance and liquidity. |
| Franklin Multisector Income ETF | Unrated Debt Securities | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Unrated Debt Securities: Certain unrated debt securities determined by the investment manager to be of comparable credit quality to rated securities which the Fund may purchase may pay a higher interest rate than such rated debt securities and be subject to a greater risk of illiquidity or price changes. Less public information and independent credit analysis are typically available about unrated securities or issuers, and therefore they may be subject to greater risk of default. |
| Franklin Multisector Income ETF | Management | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Management: The Fund is subject to management risk because it is an actively managed ETF. The Fund's investment manager applies investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that these decisions will produce the desired results. |
| Franklin Multisector Income 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 (including the development of artificial intelligence and machine learning), 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. The rapid development and increasingly widespread use of artificial intelligence technologies could increase the effectiveness of cyber attacks and exacerbate the risks. |
| Franklin Multisector Income 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. To the extent that the underlying securities held by the Fund trade on an exchange that is closed when the securities exchange on which the Fund shares list and trade is open, there may be market uncertainty about the stale security pricing (i.e., the last quote from its closed foreign market) resulting in premiums or discounts to NAV that may be greater than those experienced by other ETFs. |
| Franklin Multisector Income 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 Multisector Income ETF | Cash Transactions | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Cash Transactions: Unlike certain ETFs, the Fund expects to generally effect its creations and redemptions entirely for cash, rather than for in-kind securities. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the Fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in Fund shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind. |
| Franklin Multisector Income 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. |
| Franklin Multisector Income 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 or an affiliate of the investment manager, may from time to time own a substantial amount of the Fund’s shares. In addition, a third-party investor, the investment manager or an affiliate of the investment manager, 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 Multisector Income ETF | Franklin Multisector Income ETF | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.39% |
| 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 | 0.39% |
| Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 40 |
| Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 126 |
| Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 220 |
| Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | $ 494 |