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FRANKLIN LOW DURATION TOTAL RETURN FUND  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Franklin Low Duration Total Return Fund
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

A high level of current income as is consistent with prudent investing, while seeking preservation of capital.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts in Class A if you and your family invest, or agree to invest in the future, at least $100,000 in Franklin Templeton funds. More information about these and other discounts is available from your financial professional and under “Your Account” on page 153 in the Fund's Prospectus and under “Buying and Selling Shares” on page 92 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in Appendix A - "Intermediary Sales Charge Discounts and Waivers" to the Fund's prospectus.

Please note that the tables and examples below do not reflect any transaction fees that may be charged by financial intermediaries, or commissions that a shareholder may be required to pay directly to its financial intermediary when buying or selling Class R6 or Advisor Class shares.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate

higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 85.02% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 85.02%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts in Class A if you and your family invest, or agree to invest in the future, at least $100,000 in Franklin Templeton funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 100,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem 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. The Example reflects adjustments made to the Fund's operating expenses due to the fee waivers and/or expense reimbursements by management for the 1 Year numbers only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption If you do not sell your shares:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests primarily in debt securities, which may be represented by derivative investments that provide exposure to debt securities such as futures, options and swap agreements. The debt securities in which the Fund may invest include government and corporate debt securities, mortgage- and asset-backed securities, floating interest rate corporate loans and debt securities and municipal securities.

The Fund targets an estimated average portfolio duration of three (3) years or less. Duration is a measure of the expected price volatility of a debt instrument as a result of changes in market rates of interest, based on the weighted average timing of the instrument’s expected principal and interest payments and other factors.

Under normal market conditions, the Fund invests primarily in investment grade debt securities and in unrated securities that the investment manager deems are of comparable quality. Derivatives whose reference securities are investment grade are considered by the Fund to be investment grade. The Fund's focus on the credit quality of its portfolio is intended to reduce credit risk and help to preserve the Fund's capital.

The Fund also may invest up to 20% of its total assets in non-investment grade securities, including up to 5% in securities rated lower than B- by S&P® Global Ratings (S&P) or Moody's Investors Services (Moody's), which may include defaulted securities. (In calculating the above non-investment grade debt limitations, the Fund combines its non-investment grade debt securities with the net long and short exposure to non-investment grade debt securities from derivative instruments.) Excluding derivatives, the Fund invests no more than 33% of its total assets in non-investment grade debt securities, including no more than 5% in securities rated lower than B- by S&P or Moody's, which may include defaulted securities. For purposes of the credit limitations above, non-investment grade debt securities include unrated securities that the investment manager deems are of comparable quality. The Fund's investments in marketplace loans are not subject to the 5% limitations described above.

The Fund may invest up to 25% of its total assets in foreign securities, including up to 20% of its total assets in non-U.S. dollar denominated securities and up to 10% of its total assets in emerging market securities.

The Fund may invest a portion of its assets in marketplace loans to consumers and small and mid-sized enterprises or companies (SMEs), which may include loans for individual leases, that may be originated through online lending platforms.

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 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 also invest a small portion of its assets directly in whole mortgage loans.

To pursue its investment goal, the Fund regularly enters into various derivative transactions, including currency forwards, currency, interest rate/bond futures contracts and options on interest rate futures contracts, options on exchange-traded funds, swap agreements, including interest rate, fixed income total return, currency and credit default swaps, options on interest rate and credit default swap agreements. The use of these derivative transactions may allow the Fund to obtain net long or short exposures to select currencies, interest rates, countries, duration or credit risks. These derivatives may be used to enhance Fund returns, increase liquidity, gain exposure to certain instruments or markets in a more efficient or less expensive way and/or hedge risks associated with its other portfolio investments.

The Fund may invest in mortgage dollar rolls. In a mortgage dollar roll, the Fund sells mortgage-backed securities for delivery in the current month and simultaneously contracts to repurchase substantially similar (same type, coupon, and maturity) securities on a specified future date. During the period between the sale and repurchase, the Fund forgoes principal and interest paid on the mortgage-backed securities. The Fund earns money on a mortgage dollar roll from any difference between the sale price and the future purchase price, as well as the interest earned on the cash proceeds of the initial sale.

The Fund may invest a significant portion of its assets in structured fixed income securities, such as collateralized debt obligations (“CDOs”), which are generally a type of asset-backed securities. The Fund's investments in CDOs may include investments in collateralized loan obiligations (CLOs), which are a type of CDO.

In choosing investments, the Fund’s investment manager selects securities in various market sectors based on the investment manager’s 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.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests primarily in debt securities, which may be represented by derivative investments that provide exposure to debt securities such as futures, options and swap agreements.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

You could lose money by investing in the Fund. Mutual fund 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.

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.

High-Yield Debt Securities Issuers of lower-rated or “high-yield” debt securities (also known as “junk bonds”) are not as strong financially as those issuing higher credit quality debt securities. High-yield debt securities 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 securities 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 securities generally fluctuate more than those of higher credit quality. High-yield debt securities are generally more illiquid (harder to sell) and harder to value.

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.

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.

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 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.

Issuers of asset-backed securities may have limited ability to enforce the security interest in the underlying assets, and credit enhancements provided to support the securities, if any, may be inadequate to protect investors in the event of default. Like mortgage securities, asset-backed securities are subject to prepayment and extension risks.

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.

Collateralized Debt Obligations (CDOs)   The risks of an investment in a CDO, a type of asset backed security, and which includes CLOs, 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.

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.

Marketplace Loans   Marketplace loans are subject to the risks associated with debt investments generally, including but not limited to, interest rate, credit, liquidity, high yield debt, market and income risks. Marketplace loans generally are not rated by rating agencies, are often unsecured, and are highly risky and speculative investments. Lenders and investors, such as the Fund, assume all of the credit risk on the loans they fund or purchase and there are no assurances that payments due on underlying loans will be made. In addition, investments in marketplace loans may be adversely affected if the platform operator or a third-party service provider becomes unable or unwilling to fulfill its obligations in servicing the loans. Moreover, the Fund may have limited information about the underlying marketplace loans and information provided to the platform regarding the loans and the borrowers’ credit information may be incomplete, inaccurate or outdated. It also may be difficult for the Fund to sell an investment in a marketplace loan before maturity at the price at which the Fund believes the loan should be valued because these loans typically are considered by the Fund to be illiquid securities.

Foreign Securities (non-U.S.) Investing in foreign securities typically involves more risks than investing in U.S. securities, including risks related to currency exchange rates and policies, country or government specific issues, less favorable trading practices or regulation and greater price volatility. Certain of these risks also may apply to securities of U.S. companies with significant foreign operations. The risks of investing in foreign securities are typically greater in less developed or emerging market countries.

Currency Management Strategies   Currency management strategies may substantially change the Fund’s exposure to currency exchange rates and could result in losses to the Fund if currencies do not perform as the investment manager expects. In addition, currency management strategies, to the extent that they reduce the Fund’s exposure to currency risks, also reduce the Fund’s ability to benefit from favorable changes in currency exchange rates. Using currency

management strategies for purposes other than hedging further increases the Fund’s exposure to foreign investment losses. Currency markets generally are not as regulated as securities markets. In addition, currency rates may fluctuate significantly over short periods of time, and can reduce returns.

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.

Emerging Market Countries The Fund’s investments in emerging 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.

Extension   Some debt securities, particularly mortgage-backed 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.

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.

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.

Liquidity From time to time, 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, which may arise or increase in response to a specific economic event or because the investment manager wishes to purchase particular investments or believes that a higher level of liquidity would be advantageous. Reduced liquidity will also generally lower the value of such securities or other investments. Market prices for such securities or other investments may be relatively volatile.

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.

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.

The current global outbreak of the novel strain of coronavirus, COVID-19, has resulted in market closures and dislocations, extreme volatility, liquidity constraints and increased trading costs. Efforts to contain the spread of COVID-19 have resulted in global travel restrictions and disruptions of healthcare systems, business operations and supply chains, layoffs, volatility in consumer demand for certain products, defaults and credit ratings downgrades, and other significant economic impacts. The effects of COVID-19 have impacted global economic activity across many industries and may heighten other pre-existing political, social and economic risks, locally or globally. The full impact of the COVID-19 pandemic is unpredictable and may adversely affect the Fund’s performance.

LIBOR Transition The Fund invests in financial instruments that may have floating or variable rate calculations for payment obligations or financing terms based on the London Interbank Offered Rate (LIBOR), which is the benchmark interest rate at which major global banks lend to one another in the international interbank

market for short-term loans. It was originally anticipated that LIBOR would be discontinued by the end of 2021 and would cease to be published after that time. Although many LIBOR rates were phased out at the end of 2021 as originally intended, a selection of widely used USD LIBOR rates will continue to be published until June 2023 in order to assist with the transition to an alternative rate. The impact of the discontinuation of LIBOR and the transition to an alternative rate on the Fund's portfolio remains uncertain. There can be no guarantee that financial instruments that transition to an alternative reference rate will retain the same value or liquidity as they would otherwise have had.

Management The Fund is subject to management risk because it is an actively managed investment portfolio. 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.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money by investing in the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_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 for Class A shares. 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. 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 franklintempleton.com or by calling (800) DIAL BEN/342-5236.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns 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 for Class A shares. 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.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_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] rr_BarChartHeading Class A Annual Total Returns
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
   

Best Quarter:

2020, Q2

6.09%

Worst Quarter:

2020, Q1

-6.45%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (figures reflect sales charges) For periods ended December 31, 2021
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Historical performance for Class C shares prior to their inception is based on the performance of Class A shares. Class C performance has been adjusted to reflect differences in sales charges and 12b-1 expenses between classes.

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.

FRANKLIN LOW DURATION TOTAL RETURN FUND | Bloomberg US Government & Credit (1-3 Year) Index  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (1-3 Year) Index (index reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel Bloomberg US Government & Credit (1-3 Year) Index (index reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (0.47%)
5 Years rr_AverageAnnualReturnYear05 1.85%
10 Years rr_AverageAnnualReturnYear10 1.39%
FRANKLIN LOW DURATION TOTAL RETURN FUND | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management fees rr_ManagementFeesOverAssets 0.49%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.20%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.96% [2]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.25%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.71% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 296
3 Years rr_ExpenseExampleYear03 500
5 Years rr_ExpenseExampleYear05 720
10 Years rr_ExpenseExampleYear10 $ 1,355
Annual Return 2012 rr_AnnualReturn2012 4.08%
Annual Return 2013 rr_AnnualReturn2013 1.22%
Annual Return 2014 rr_AnnualReturn2014 1.01%
Annual Return 2015 rr_AnnualReturn2015 (0.59%)
Annual Return 2016 rr_AnnualReturn2016 2.67%
Annual Return 2017 rr_AnnualReturn2017 1.22%
Annual Return 2018 rr_AnnualReturn2018 0.59%
Annual Return 2019 rr_AnnualReturn2019 4.48%
Annual Return 2020 rr_AnnualReturn2020 3.03%
Annual Return 2021 rr_AnnualReturn2021 0.89%
Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.09%
Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.45%)
Label rr_AverageAnnualReturnLabel Return before taxes
1 Year rr_AverageAnnualReturnYear01 (1.36%)
5 Years rr_AverageAnnualReturnYear05 1.56%
10 Years rr_AverageAnnualReturnYear10 1.62%
FRANKLIN LOW DURATION TOTAL RETURN FUND | Class A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions
1 Year rr_AverageAnnualReturnYear01 (2.30%)
5 Years rr_AverageAnnualReturnYear05 0.43%
10 Years rr_AverageAnnualReturnYear10 0.60%
FRANKLIN LOW DURATION TOTAL RETURN FUND | Class A | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions and sale of Fund shares
1 Year rr_AverageAnnualReturnYear01 (0.81%)
5 Years rr_AverageAnnualReturnYear05 0.70%
10 Years rr_AverageAnnualReturnYear10 0.79%
FRANKLIN LOW DURATION TOTAL RETURN FUND | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management fees rr_ManagementFeesOverAssets 0.49%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.65%
Other expenses rr_OtherExpensesOverAssets 0.20%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [2]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.36% [2]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.25%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.11% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 213
3 Years rr_ExpenseExampleYear03 406
5 Years rr_ExpenseExampleYear05 721
10 Years rr_ExpenseExampleYear10 1,504
1 Year rr_ExpenseExampleNoRedemptionYear01 113
3 Years rr_ExpenseExampleNoRedemptionYear03 406
5 Years rr_ExpenseExampleNoRedemptionYear05 721
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,504
1 Year rr_AverageAnnualReturnYear01 (0.59%)
5 Years rr_AverageAnnualReturnYear05 1.62%
10 Years rr_AverageAnnualReturnYear10 1.44%
FRANKLIN LOW DURATION TOTAL RETURN FUND | Class R  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.49%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.20%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [2]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.21% [2]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.25%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.96% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 98
3 Years rr_ExpenseExampleYear03 359
5 Years rr_ExpenseExampleYear05 640
10 Years rr_ExpenseExampleYear10 $ 1,442
1 Year rr_AverageAnnualReturnYear01 0.54%
5 Years rr_AverageAnnualReturnYear05 1.77%
10 Years rr_AverageAnnualReturnYear10 1.57%
FRANKLIN LOW DURATION TOTAL RETURN FUND | Class R6  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.49%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.10%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.61% [2]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.29%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.32% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 33
3 Years rr_ExpenseExampleYear03 166
5 Years rr_ExpenseExampleYear05 311
10 Years rr_ExpenseExampleYear10 $ 733
1 Year rr_AverageAnnualReturnYear01 1.15%
5 Years rr_AverageAnnualReturnYear05 2.41%
Since Inception rr_AverageAnnualReturnSinceInception 1.96% [4]
FRANKLIN LOW DURATION TOTAL RETURN FUND | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.49%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.20%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.71% [2]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.25%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.46% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 47
3 Years rr_ExpenseExampleYear03 202
5 Years rr_ExpenseExampleYear05 370
10 Years rr_ExpenseExampleYear10 $ 860
1 Year rr_AverageAnnualReturnYear01 1.03%
5 Years rr_AverageAnnualReturnYear05 2.29%
10 Years rr_AverageAnnualReturnYear10 2.10%
[1]

There is a 1% contingent deferred sales charge that applies to investments of $500,000 or more (see "Investment of $500,000 or More" under "Choosing a Share Class") and purchases by certain retirement plans without an initial sales charge on shares sold within 18 months of purchase.
[2] Total annual Fund operating expenses differ from the ratio of expenses to average net assets shown in the Financial Highlights, which reflect the operating expenses of the Fund and do not include acquired fund fees and expenses.
[3] The investment manager has contractually agreed to waive or assume certain expenses so that total annual Fund operating expenses (excluding Rule 12b-1 fees; acquired fund fees and expenses and certain nonroutine expenses) for each class of the Fund do not exceed 0.44%, and for Class R6 do not exceed 0.30% until February 28, 2023. During the term, this fee waiver and expense reimbursement agreement may not be terminated or amended without approval of the board of trustees except to add series and classes, to reflect the extension of termination dates or to lower the cap on Fund’s fees and expenses (which would result in lower fees for shareholders).
[4]

Since inception May 1, 2013.