GOF P3 10/18
SUPPLEMENT DATED OCTOBER 30, 2018
TO THE CURRENTLY EFFECTIVE PROSPECTUS
OF EACH OF THE FUNDS LISTED BELOW
Franklin Investors Securities Trust
Franklin Low Duration Total Return Fund
Franklin Total Return Fund
Franklin Floating Rate Daily Access Fund
Franklin Strategic Series
Franklin Flexible Alpha Bond Fund
Franklin Strategic Income Fund
The Prospectuses are amended as follows:
I. The following is added to the “Fund Summary – Principal Investment Strategies” section for each Fund (excluding the Franklin Floating Rate Daily Access Fund and Franklin Flexible Alpha Bond Fund):
The Fund may invest significantly in complex fixed income securities, such as collateralized debt obligations (“CDOs”), which are generally types of asset-backed securities.
The Fund may invest significantly in complex fixed income securities, such as collateralized loan obligations (CLOs) and other collateralized debt obligations (CDOs), which are generally types of asset-backed securities.
III. The following is added to the “Fund Summary – Principal Risks” section for each Fund (excluding the Franklin Flexible Alpha Bond Fund):
Collateralized Debt Obligations (CDOs) The risks of an investment in a CDO, a type of asset backed security, 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. CDOs may be deemed to be illiquid securities and subject to the Fund’s restrictions on investments in illiquid securities. 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.
Collateralized Debt Obligations (CDOs) The risks of an investment in a CDO, a type of asset backed security, 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. CDOs may be deemed to be illiquid securities and subject to the Fund’s restrictions on investments in illiquid securities. 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.
Please keep this supplement with your prospectus for future reference.
1
Label | Element | Value |
---|---|---|
Risk/Return: | rr_RiskReturnAbstract | |
Document Type | dei_DocumentType | 497 |
Document Period End Date | dei_DocumentPeriodEndDate | Oct. 31, 2017 |
Registrant Name | dei_EntityRegistrantName | FRANKLIN INVESTORS SECURITIES TRUST |
Central Index Key | dei_EntityCentralIndexKey | 0000809707 |
Investment Company Type | dei_EntityInvCompanyType | N-1A |
Amendment Flag | dei_AmendmentFlag | false |
Document Creation Date | dei_DocumentCreationDate | Oct. 30, 2018 |
Document Effective Date | dei_DocumentEffectiveDate | Oct. 30, 2018 |
Prospectus Date | rr_ProspectusDate | Mar. 01, 2018 |
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Fund Summary | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Investment Goal | ||||||||||||||||||||||||||||||||||||||||||||||||||||
High level of current income. A secondary goal is preservation of capital. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Fees and Expenses of the Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||
These tables describe the fees and expenses that you may pay if you buy and hold 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 135 in the Fund's Prospectus and under Buying and Selling Shares on page buySellPageNumber of the Funds 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 Funds 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 (fees paid directly from your investment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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<div><p>Annual Fund Operating Expenses</p><p>(expenses that you pay each year as a percentage of the value of your investment)</p></div> | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Example | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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If you do not sell your shares: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Portfolio Turnover | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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 64.21% of the average value of its portfolio. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal Investment Strategies | ||||||||||||||||||||||||||||||||||||||||||||||||||||
The Fund normally invests at least 80% of its net assets in income-producing floating interest rate corporate loans and corporate debt securities made to or issued by U.S. companies, non-U.S. entities and U.S. subsidiaries of non-U.S. entities. Floating interest rates vary with and are periodically adjusted to a generally recognized base interest rate such as the London Interbank Offered Rate (LIBOR) or the Prime Rate. The Fund may invest in companies whose financial condition is troubled or uncertain and that may be involved in bankruptcy proceedings, reorganizations or financial restructurings. Floating interest rate corporate loans and debt securities, also called bank loans or senior floating rate interests (collectively, floating rate investments), generally have credit ratings below investment grade and may be subject to restrictions on resale. Under normal market conditions, the Fund invests at least 75% of its net assets in floating rate investments that are rated B- or higher at the time of purchase by a nationally recognized statistical rating organization (NRSRO) or, if unrated, are determined to be of comparable quality by the Funds investment manager. Under normal market conditions, the Fund may invest up to 25% of its net assets in floating rate investments that are rated below B- by an NRSRO or, if unrated, are determined to be of comparable quality by the investment manager. The Fund's floating rate investments typically hold the most senior position in the capitalization structure of a company and are generally secured by specific collateral. Such senior position means that, in case the company becomes insolvent, the lenders or security holders in a senior position like the Fund's position will typically be paid before other unsecured or subordinated creditors of the company from the assets of the company. The Fund typically invests in a corporate loan or corporate debt security if the investment manager judges that the borrower can meet the scheduled payments of interest and principal on the obligation. The investment manager performs its own independent credit analysis of each borrower/issuer and of the collateral structure securing the Funds investment. The investment manager also considers the nature of the industry in which the borrower operates, the nature of the borrower's assets, and the general quality and creditworthiness of the borrower and of any shareholder or other entity providing credit support to the borrower. The Fund may invest in covenant lite loans and debt securities. Certain financial institutions may define covenant lite loans differently. Covenant lite loans or securities, which have varied terms and conditions, may have tranches that contain fewer or no restrictive covenants. The tranche of the covenant lite loan or debt security that has fewer restrictions typically does not include the legal clauses which allow an investor to proactively enforce financial covenants or prevent undesired actions by the borrower/issuer. The Fund may treat all of the tranches of a loan with a covenant lite tranche as covenant lite, regardless of what tranche the Fund owns. Covenant lite loans and debt securities also generally give the borrower/issuer more flexibility, including the ability to make an acquisition, pay dividends or issue additional debt, if they have met certain loan terms. Covenant lite loans and debt securities also generally do not permit an investor to declare a default, and therefore receive collateral, if certain criteria are breached or to force restructurings and other capital changes on struggling borrowers/issuers. The Fund may experience relatively greater difficulty or delays in enforcing its rights on its holdings of certain covenant lite loans and debt securities than its holdings of loans or securities with the usual covenants. However, the portfolio managers are normally able to take appropriate actions without the help of covenants in the loans or debt securities. The Fund may invest significantly in complex fixed income securities, such as collateralized loan obligations (CLOs) and other collateralized debt obligations (CDOs), which are generally types of asset-backed securities. The Fund currently limits its investments in debt obligations of non-U.S. entities to no more than 25% of its total assets. The Fund currently invests predominantly in debt obligations that are U.S. dollar-denominated or otherwise provide for payment in U.S. dollars. The Fund currently does not intend to invest more than 25% of its net assets in the obligations of borrowers in any single industry, except that, under normal market conditions, the Fund invests more than 25% of its net assets in debt obligations of companies operating in the industry group consisting of financial institutions and their holding companies, including commercial banks, thrift institutions, insurance companies and finance companies. These firms, or "agent banks," may serve as administrators of corporate loans issued by other companies. For purposes of this restriction, the Fund currently considers such companies to include the borrower, the agent bank and any intermediate participant. The Fund may invest up to 100% of its net assets in loans where firms in such industry group are borrowers, agent banks or intermediate participants. In addition to the Funds main investments, the Fund may invest up to 20% of its net assets in certain other types of debt obligations or securities, including other secured, second lien, subordinated or unsecured corporate loans and corporate debt securities, and fixed rate obligations of U.S. companies, non-U.S. entities and U.S. subsidiaries of non-U.S. entities. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal Risks | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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 credit rating may affect a security's 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 on 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. 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 Funds ability to sell such securities or other investments when necessary to meet the Funds liquidity needs, in response to a specific economic event or to buy particular securities to invest available cash or when considered advantageous by the investment manager. Reduced liquidity will also generally lower the value of such securities or other investments. Market prices for such securities or other investments may be volatile. Impairment of Collateral The value of collateral securing a loan or other corporate debt security may decline after the Fund invests and there is a risk that the value of the collateral may not be sufficient to cover the amount owed to the Fund, or the collateral securing a loan may be found invalid, may be used to pay other outstanding obligations of the borrower under applicable law or may be difficult to sell. 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. 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. 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. 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 and demand of bonds. In general, fixed rate securities with longer maturities or durations are more sensitive to interest rate changes. 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. Income Because the Fund can only distribute what it earns, 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. Concentration Because of the Funds focus on a given industry or group of industries, the losses the Fund may experience are greater upon any single economic, business, political, regulatory, or other occurrence affecting such industry or group of industries. As a result, there may be more fluctuation in the price of the Funds shares. Collateralized Debt Obligations (CDOs) The risks of an investment in a CDO, a type of asset backed security, 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. CDOs may be deemed to be illiquid securities and subject to the Funds restrictions on investments in illiquid securities. 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. 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. 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Performance | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Class A Annual Total Returns | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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<div><p>Average Annual Total Returns<br/>(figures reflect sales charges)</p><p>For the periods ended December 31, 2017</p></div> | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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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. |
Label | Element | Value | ||||||||||
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Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Registrant Name | dei_EntityRegistrantName | FRANKLIN INVESTORS SECURITIES TRUST | ||||||||||
Prospectus Date | rr_ProspectusDate | Mar. 01, 2018 | ||||||||||
Risk/Return [Heading] | rr_RiskReturnHeading | Fund Summary | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Objective [Heading] | rr_ObjectiveHeading | Investment Goal | ||||||||||
Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | High level of current income. A secondary goal is 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 and hold 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 135 in the Fund's Prospectus and under Buying and Selling Shares on page buySellPageNumber of the Funds 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 Funds 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. |
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Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | Shareholder Fees (fees paid directly from your investment) | ||||||||||
Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | <div><p>Annual Fund Operating Expenses</p><p>(expenses that you pay each year as a percentage of the value of your investment)</p></div> | ||||||||||
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 64.21% of the average value of its portfolio. |
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Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 64.21% | ||||||||||
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 | The Fund normally invests at least 80% of its net assets in income-producing floating interest rate corporate loans and corporate debt securities made to or issued by U.S. companies, non-U.S. entities and U.S. subsidiaries of non-U.S. entities. Floating interest rates vary with and are periodically adjusted to a generally recognized base interest rate such as the London Interbank Offered Rate (LIBOR) or the Prime Rate. The Fund may invest in companies whose financial condition is troubled or uncertain and that may be involved in bankruptcy proceedings, reorganizations or financial restructurings. Floating interest rate corporate loans and debt securities, also called bank loans or senior floating rate interests (collectively, floating rate investments), generally have credit ratings below investment grade and may be subject to restrictions on resale. Under normal market conditions, the Fund invests at least 75% of its net assets in floating rate investments that are rated B- or higher at the time of purchase by a nationally recognized statistical rating organization (NRSRO) or, if unrated, are determined to be of comparable quality by the Funds investment manager. Under normal market conditions, the Fund may invest up to 25% of its net assets in floating rate investments that are rated below B- by an NRSRO or, if unrated, are determined to be of comparable quality by the investment manager. The Fund's floating rate investments typically hold the most senior position in the capitalization structure of a company and are generally secured by specific collateral. Such senior position means that, in case the company becomes insolvent, the lenders or security holders in a senior position like the Fund's position will typically be paid before other unsecured or subordinated creditors of the company from the assets of the company. The Fund typically invests in a corporate loan or corporate debt security if the investment manager judges that the borrower can meet the scheduled payments of interest and principal on the obligation. The investment manager performs its own independent credit analysis of each borrower/issuer and of the collateral structure securing the Funds investment. The investment manager also considers the nature of the industry in which the borrower operates, the nature of the borrower's assets, and the general quality and creditworthiness of the borrower and of any shareholder or other entity providing credit support to the borrower. The Fund may invest in covenant lite loans and debt securities. Certain financial institutions may define covenant lite loans differently. Covenant lite loans or securities, which have varied terms and conditions, may have tranches that contain fewer or no restrictive covenants. The tranche of the covenant lite loan or debt security that has fewer restrictions typically does not include the legal clauses which allow an investor to proactively enforce financial covenants or prevent undesired actions by the borrower/issuer. The Fund may treat all of the tranches of a loan with a covenant lite tranche as covenant lite, regardless of what tranche the Fund owns. Covenant lite loans and debt securities also generally give the borrower/issuer more flexibility, including the ability to make an acquisition, pay dividends or issue additional debt, if they have met certain loan terms. Covenant lite loans and debt securities also generally do not permit an investor to declare a default, and therefore receive collateral, if certain criteria are breached or to force restructurings and other capital changes on struggling borrowers/issuers. The Fund may experience relatively greater difficulty or delays in enforcing its rights on its holdings of certain covenant lite loans and debt securities than its holdings of loans or securities with the usual covenants. However, the portfolio managers are normally able to take appropriate actions without the help of covenants in the loans or debt securities. The Fund may invest significantly in complex fixed income securities, such as collateralized loan obligations (CLOs) and other collateralized debt obligations (CDOs), which are generally types of asset-backed securities. The Fund currently limits its investments in debt obligations of non-U.S. entities to no more than 25% of its total assets. The Fund currently invests predominantly in debt obligations that are U.S. dollar-denominated or otherwise provide for payment in U.S. dollars. The Fund currently does not intend to invest more than 25% of its net assets in the obligations of borrowers in any single industry, except that, under normal market conditions, the Fund invests more than 25% of its net assets in debt obligations of companies operating in the industry group consisting of financial institutions and their holding companies, including commercial banks, thrift institutions, insurance companies and finance companies. These firms, or "agent banks," may serve as administrators of corporate loans issued by other companies. For purposes of this restriction, the Fund currently considers such companies to include the borrower, the agent bank and any intermediate participant. The Fund may invest up to 100% of its net assets in loans where firms in such industry group are borrowers, agent banks or intermediate participants. In addition to the Funds main investments, the Fund may invest up to 20% of its net assets in certain other types of debt obligations or securities, including other secured, second lien, subordinated or unsecured corporate loans and corporate debt securities, and fixed rate obligations of U.S. companies, non-U.S. entities and U.S. subsidiaries of non-U.S. entities. |
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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 credit rating may affect a security's 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 on 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. 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 Funds ability to sell such securities or other investments when necessary to meet the Funds liquidity needs, in response to a specific economic event or to buy particular securities to invest available cash or when considered advantageous by the investment manager. Reduced liquidity will also generally lower the value of such securities or other investments. Market prices for such securities or other investments may be volatile. Impairment of Collateral The value of collateral securing a loan or other corporate debt security may decline after the Fund invests and there is a risk that the value of the collateral may not be sufficient to cover the amount owed to the Fund, or the collateral securing a loan may be found invalid, may be used to pay other outstanding obligations of the borrower under applicable law or may be difficult to sell. 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. 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. 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. 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 and demand of bonds. In general, fixed rate securities with longer maturities or durations are more sensitive to interest rate changes. 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. Income Because the Fund can only distribute what it earns, 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. Concentration Because of the Funds focus on a given industry or group of industries, the losses the Fund may experience are greater upon any single economic, business, political, regulatory, or other occurrence affecting such industry or group of industries. As a result, there may be more fluctuation in the price of the Funds shares. Collateralized Debt Obligations (CDOs) The risks of an investment in a CDO, a type of asset backed security, 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. CDOs may be deemed to be illiquid securities and subject to the Funds restrictions on investments in illiquid securities. 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. 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. 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. |
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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. |
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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 |
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Performance Table Heading | rr_PerformanceTableHeading | <div><p>Average Annual Total Returns<br/>(figures reflect sales charges)</p><p>For the periods ended December 31, 2017</p></div> | ||||||||||
Performance Table Closing [Text Block] | rr_PerformanceTableClosingTextBlock | 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. |
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Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | 2.25% | [1] | |||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | [1] | |||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.11% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.05% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.91% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.05%) | [3] | |||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 0.86% | [2],[3] | |||||||||
1 year | rr_ExpenseExampleYear01 | $ 311 | ||||||||||
3 years | rr_ExpenseExampleYear03 | 504 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 713 | ||||||||||
10 years | rr_ExpenseExampleYear10 | $ 1,317 | ||||||||||
2008 | rr_AnnualReturn2008 | (22.83%) | ||||||||||
2009 | rr_AnnualReturn2009 | 29.56% | ||||||||||
2010 | rr_AnnualReturn2010 | 8.36% | ||||||||||
2011 | rr_AnnualReturn2011 | 0.87% | ||||||||||
2012 | rr_AnnualReturn2012 | 8.07% | ||||||||||
2013 | rr_AnnualReturn2013 | 4.53% | ||||||||||
2014 | rr_AnnualReturn2014 | 0.49% | ||||||||||
2015 | rr_AnnualReturn2015 | (2.12%) | ||||||||||
2016 | rr_AnnualReturn2016 | 11.62% | ||||||||||
2017 | rr_AnnualReturn2017 | 2.18% | ||||||||||
Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best Quarter: | ||||||||||
Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Jun. 30, 2009 | ||||||||||
Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 11.68% | ||||||||||
Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst Quarter: | ||||||||||
Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Dec. 31, 2008 | ||||||||||
Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (18.90%) | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Class C | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | [4] | |||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | [4] | |||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | 0.65% | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.11% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.05% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 1.31% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.05%) | [3] | |||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 1.26% | [2],[3] | |||||||||
1 year | rr_ExpenseExampleYear01 | $ 228 | ||||||||||
3 years | rr_ExpenseExampleYear03 | 410 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 714 | ||||||||||
10 years | rr_ExpenseExampleYear10 | 1,578 | ||||||||||
1 Year | rr_ExpenseExampleNoRedemptionYear01 | 128 | ||||||||||
3 Years | rr_ExpenseExampleNoRedemptionYear03 | 410 | ||||||||||
5 Years | rr_ExpenseExampleNoRedemptionYear05 | 714 | ||||||||||
10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,578 | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Class R6 | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | ||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.04% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.05% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.59% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.05%) | [3] | |||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 0.54% | [2],[3] | |||||||||
1 year | rr_ExpenseExampleYear01 | $ 55 | ||||||||||
3 years | rr_ExpenseExampleYear03 | 184 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 325 | ||||||||||
10 years | rr_ExpenseExampleYear10 | $ 735 | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Advisor Class | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | ||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.11% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.05% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.66% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.05%) | [3] | |||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 0.61% | [2],[3] | |||||||||
1 year | rr_ExpenseExampleYear01 | $ 62 | ||||||||||
3 years | rr_ExpenseExampleYear03 | 206 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 363 | ||||||||||
10 years | rr_ExpenseExampleYear10 | $ 819 | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Return Before Taxes | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Floating Rate Daily Access Fund | ||||||||||
Label | rr_AverageAnnualReturnLabel | Return Before Taxes | ||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (0.07%) | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 2.77% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 3.08% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Return Before Taxes | Class C | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 0.80% | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 2.83% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 2.90% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Return Before Taxes | Class R6 | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 2.52% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | |||||||||||
Since Inception | rr_AverageAnnualReturnSinceInception | 3.34% | [5] | |||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Return Before Taxes | Advisor Class | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 2.42% | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 3.49% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 3.57% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | After Taxes on Distributions | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Floating Rate Daily Access Fund | ||||||||||
Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions | ||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (1.58%) | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 1.00% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 1.41% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | After Taxes on Distributions and Sales | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Floating Rate Daily Access Fund | ||||||||||
Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions and Sale of Fund Shares | ||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (0.05%) | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 1.29% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 1.64% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Floating Rate Daily Access Fund | Credit Suisse Leveraged Loan Index (index reflects no deduction for fees, expenses or taxes) | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 4.25% | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 4.33% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 4.57% | ||||||||||
|
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Fund Summary | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Investment Goal | ||||||||||||||||||||||||||||||||||||||||||||||||||||
A high level of current income as is consistent with prudent investing, while seeking preservation of capital. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Fees and Expenses of the Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||
These tables describe the fees and expenses that you may pay if you buy and hold 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 135 in the Fund's Prospectus and under Buying and Selling Shares on page buySellPageNumber of the Funds 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 Funds 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 (fees paid directly from your investment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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<div><p>Annual Fund Operating Expenses</p><p>(expenses that you pay each year as a percentage of the value of your investment)</p></div> | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Example | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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If you do not sell your shares: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Portfolio Turnover | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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 50.40% of the average value of its portfolio. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal Investment Strategies | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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 instruments expected principal and interest payments and other factors. 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 or 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 will invest 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 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 small portion of its assets in marketplace loans to consumers and small and mid-sized enterprises or companies (SMEs) 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 also invest a small portion of its assets directly in 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, and swap agreements, including interest rate, fixed income total return, currency and credit default swaps, and 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 significantly in complex fixed income securities, such as collateralized debt obligations (CDOs), which are generally types of asset-backed securities. In choosing investments, the Funds investment manager selects securities in various market sectors based on the investment managers 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal Risks | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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. 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 and demand of bonds. In general, fixed rate securities with longer maturities or durations are more sensitive to interest rate changes. 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 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 on 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. 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 the underlying instrument, in addition to other risks. Derivatives involve costs and can create economic leverage in the Funds 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 Funds 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. Derivatives also may present 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, 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. CDOs may be deemed to be illiquid securities and subject to the Funds restrictions on investments in illiquid securities. 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 Because the Fund can only distribute what it earns, 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. 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. 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. Currency Management Strategies Currency management strategies may substantially change the Funds 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 Funds exposure to currency risks, may also reduce the Funds ability to benefit from favorable changes in currency exchange rates. Using currency management strategies for purposes other than hedging further increases the Funds 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 securities 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 governments 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 Funds 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 and currency markets, including: delays in settling portfolio 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 securitys 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. 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. 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 Funds ability to sell such securities or other investments when necessary to meet the Funds liquidity needs, in response to a specific economic event or to buy particular securities to invest available cash or when considered advantageous by the investment manager. Reduced liquidity will also generally lower the value of such securities or other investments. Market prices for such securities or other investments may be 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. 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Performance | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Class A Annual Total Returns | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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<div><p>Average Annual Total Returns<br/>(figures reflect sales charges)</p><p>For the periods ended December 31, 2017</p></div> | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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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. |
Label | Element | Value | ||||||||||
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Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Registrant Name | dei_EntityRegistrantName | FRANKLIN INVESTORS SECURITIES TRUST | ||||||||||
Prospectus Date | rr_ProspectusDate | Mar. 01, 2018 | ||||||||||
Risk/Return [Heading] | rr_RiskReturnHeading | Fund Summary | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
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 and hold 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 135 in the Fund's Prospectus and under Buying and Selling Shares on page buySellPageNumber of the Funds 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 Funds 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. |
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Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | Shareholder Fees (fees paid directly from your investment) | ||||||||||
Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | <div><p>Annual Fund Operating Expenses</p><p>(expenses that you pay each year as a percentage of the value of your investment)</p></div> | ||||||||||
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 50.40% of the average value of its portfolio. |
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Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 50.40% | ||||||||||
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 instruments expected principal and interest payments and other factors. 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 or 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 will invest 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 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 small portion of its assets in marketplace loans to consumers and small and mid-sized enterprises or companies (SMEs) 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 also invest a small portion of its assets directly in 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, and swap agreements, including interest rate, fixed income total return, currency and credit default swaps, and 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 significantly in complex fixed income securities, such as collateralized debt obligations (CDOs), which are generally types of asset-backed securities. In choosing investments, the Funds investment manager selects securities in various market sectors based on the investment managers 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. |
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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. 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. | ||||||||||
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. 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 and demand of bonds. In general, fixed rate securities with longer maturities or durations are more sensitive to interest rate changes. 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 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 on 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. 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 the underlying instrument, in addition to other risks. Derivatives involve costs and can create economic leverage in the Funds 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 Funds 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. Derivatives also may present 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, 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. CDOs may be deemed to be illiquid securities and subject to the Funds restrictions on investments in illiquid securities. 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 Because the Fund can only distribute what it earns, 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. 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. 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. Currency Management Strategies Currency management strategies may substantially change the Funds 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 Funds exposure to currency risks, may also reduce the Funds ability to benefit from favorable changes in currency exchange rates. Using currency management strategies for purposes other than hedging further increases the Funds 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 securities 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 governments 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 Funds 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 and currency markets, including: delays in settling portfolio 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 securitys 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. 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. 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 Funds ability to sell such securities or other investments when necessary to meet the Funds liquidity needs, in response to a specific economic event or to buy particular securities to invest available cash or when considered advantageous by the investment manager. Reduced liquidity will also generally lower the value of such securities or other investments. Market prices for such securities or other investments may be 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. 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. |
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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. |
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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 |
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Performance Table Heading | rr_PerformanceTableHeading | <div><p>Average Annual Total Returns<br/>(figures reflect sales charges)</p><p>For the periods ended December 31, 2017</p></div> | ||||||||||
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. |
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Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | 2.25% | [1] | |||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | [1] | |||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.20% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.97% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.26%) | [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 | 502 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 725 | ||||||||||
10 years | rr_ExpenseExampleYear10 | $ 1,366 | ||||||||||
2008 | rr_AnnualReturn2008 | 2.32% | ||||||||||
2009 | rr_AnnualReturn2009 | 8.24% | ||||||||||
2010 | rr_AnnualReturn2010 | 4.79% | ||||||||||
2011 | rr_AnnualReturn2011 | 0.60% | ||||||||||
2012 | rr_AnnualReturn2012 | 4.08% | ||||||||||
2013 | rr_AnnualReturn2013 | 1.22% | ||||||||||
2014 | rr_AnnualReturn2014 | 1.01% | ||||||||||
2015 | rr_AnnualReturn2015 | (0.59%) | ||||||||||
2016 | rr_AnnualReturn2016 | 2.67% | ||||||||||
2017 | rr_AnnualReturn2017 | 1.22% | ||||||||||
Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best Quarter: | ||||||||||
Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Sep. 30, 2009 | ||||||||||
Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 2.87% | ||||||||||
Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst Quarter: | ||||||||||
Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Sep. 30, 2011 | ||||||||||
Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (1.94%) | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Class C | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | [4] | |||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | [4] | |||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | 0.65% | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.20% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 1.37% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.26%) | [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 | 408 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 725 | ||||||||||
10 years | rr_ExpenseExampleYear10 | 1,625 | ||||||||||
1 Year | rr_ExpenseExampleNoRedemptionYear01 | 113 | ||||||||||
3 Years | rr_ExpenseExampleNoRedemptionYear03 | 408 | ||||||||||
5 Years | rr_ExpenseExampleNoRedemptionYear05 | 725 | ||||||||||
10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,625 | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Class R6 | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | ||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.05% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.57% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.26%) | [3] | |||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 0.31% | [2],[3] | |||||||||
1 year | rr_ExpenseExampleYear01 | $ 32 | ||||||||||
3 years | rr_ExpenseExampleYear03 | 156 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 293 | ||||||||||
10 years | rr_ExpenseExampleYear10 | $ 689 | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Advisor Class | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | ||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.50% | ||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.20% | [2] | |||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | ||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.72% | [2] | |||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.26%) | [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 | 204 | ||||||||||
5 years | rr_ExpenseExampleYear05 | 375 | ||||||||||
10 years | rr_ExpenseExampleYear10 | $ 871 | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Return Before Taxes | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Low Duration Total Return Fund | ||||||||||
Label | rr_AverageAnnualReturnLabel | Return Before Taxes | ||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (1.09%) | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 0.63% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 2.29% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Return Before Taxes | Class C | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (0.19%) | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 0.68% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 2.10% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Return Before Taxes | Class R6 | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 1.55% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | |||||||||||
Since Inception | rr_AverageAnnualReturnSinceInception | 1.38% | [5] | |||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Return Before Taxes | Advisor Class | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 1.52% | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 1.34% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 2.78% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | After Taxes on Distributions | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Low Duration Total Return Fund | ||||||||||
Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions | ||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (1.87%) | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | (0.25%) | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 1.26% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | After Taxes on Distributions and Sales | Class A | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Low Duration Total Return Fund | ||||||||||
Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions and Sale of Fund Shares | ||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (0.62%) | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 0.08% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 1.35% | ||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Low Duration Total Return Fund | Bloomberg Barclays U.S. Government & Credit (1-3 Year) Index (index reflects no deduction for fees, expenses or taxes) | ||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 0.84% | ||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 0.84% | ||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 1.85% | ||||||||||
|
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Fund Summary | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Investment Goal | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
High current income, consistent with preservation of capital. As a secondary goal, capital appreciation over the long term. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fees and Expenses of the Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
These tables describe the fees and expenses that you may pay if you buy and hold 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 135 in the Fund's Prospectus and under Buying and Selling Shares on page buySellPageNumber of the Funds 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 Funds 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 (fees paid directly from your investment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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<div><p>Annual Fund Operating Expenses</p><p>(expenses that you pay each year as a percentage of the value of your investment)</p></div> | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Example | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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If you do not sell your shares: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Portfolio Turnover | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 78.46% of the average value of its portfolio. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal Investment Strategies | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 currently focuses on government and corporate debt securities and mortgage- and asset-backed securities. Effective May 1, 2018, 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. Prior to this date, under normal market conditions, the Fund invests at least 80% of its assets in investment grade debt securities and investments. 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 or 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 will invest 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 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 small portion of its assets in marketplace loans to consumers and small and mid-sized enterprises or companies (SMEs) 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 mortgage loans. To pursue its investment goals, the Fund regularly enters into various derivative transactions, including currency forwards, currency, interest rate/bond futures contracts and options on interest rate futures contracts, and swap agreements, including interest rate, fixed income total return, currency and credit default swaps, and 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 significantly in complex fixed income securities, such as collateralized debt obligations (CDOs), which are generally types of asset-backed securities. In choosing investments, the Funds investment manager selects securities in various market sectors based on the investment managers 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal Risks | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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. 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 and demand of bonds. In general, fixed rate securities with longer maturities or durations are more sensitive to interest rate changes. 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 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 on 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. 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 the underlying instrument, in addition to other risks. Derivatives involve costs and can create economic leverage in the Funds 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 Funds 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. Derivatives also may present 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, 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. CDOs may be deemed to be illiquid securities and subject to the Funds restrictions on investments in illiquid securities. 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 Because the Fund can only distribute what it earns, 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. 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. 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. Currency Management Strategies Currency management strategies may substantially change the Funds 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 Funds exposure to currency risks, may also reduce the Funds ability to benefit from favorable changes in currency exchange rates. Using currency management strategies for purposes other than hedging further increases the Funds 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 governments 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 Funds 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 and currency markets, including: delays in settling portfolio 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 securitys 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. 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. 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 Funds ability to sell such securities or other investments when necessary to meet the Funds liquidity needs, in response to a specific economic event or to buy particular securities to invest available cash or when considered advantageous by the investment manager. Reduced liquidity will also generally lower the value of such securities or other investments. Market prices for such securities or other investments may be 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. 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. Portfolio Turnover The investment manager will sell a security when it believes it is appropriate to do so, regardless of how long the Fund has held the security. The Fund's turnover rate may exceed 100% per year because of the anticipated use of certain investment strategies. The rate of portfolio turnover will not be a limiting factor for the investment manager in making decisions on when to buy or sell securities, including entering into mortgage dollar rolls. High turnover will increase the Fund's transaction costs and may increase your tax liability if the transactions result in capital gains. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Performance | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Class A Annual Total Returns | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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<div><p>Average Annual Total Returns<br/>(figures reflect sales charges)</p><p>For the periods ended December 31, 2017</p></div> | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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. |
Label | Element | Value | ||||||||||||
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Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Registrant Name | dei_EntityRegistrantName | FRANKLIN INVESTORS SECURITIES TRUST | ||||||||||||
Prospectus Date | rr_ProspectusDate | Mar. 01, 2018 | ||||||||||||
Risk/Return [Heading] | rr_RiskReturnHeading | Fund Summary | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Objective [Heading] | rr_ObjectiveHeading | Investment Goal | ||||||||||||
Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | High current income, consistent with preservation of capital. As a secondary goal, capital appreciation over the long term. | ||||||||||||
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 and hold 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 135 in the Fund's Prospectus and under Buying and Selling Shares on page buySellPageNumber of the Funds 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 Funds 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. |
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Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | Shareholder Fees (fees paid directly from your investment) | ||||||||||||
Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | <div><p>Annual Fund Operating Expenses</p><p>(expenses that you pay each year as a percentage of the value of your investment)</p></div> | ||||||||||||
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 78.46% of the average value of its portfolio. |
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Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 78.46% | ||||||||||||
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 currently focuses on government and corporate debt securities and mortgage- and asset-backed securities. Effective May 1, 2018, 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. Prior to this date, under normal market conditions, the Fund invests at least 80% of its assets in investment grade debt securities and investments. 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 or 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 will invest 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 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 small portion of its assets in marketplace loans to consumers and small and mid-sized enterprises or companies (SMEs) 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 mortgage loans. To pursue its investment goals, the Fund regularly enters into various derivative transactions, including currency forwards, currency, interest rate/bond futures contracts and options on interest rate futures contracts, and swap agreements, including interest rate, fixed income total return, currency and credit default swaps, and 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 significantly in complex fixed income securities, such as collateralized debt obligations (CDOs), which are generally types of asset-backed securities. In choosing investments, the Funds investment manager selects securities in various market sectors based on the investment managers 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. |
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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. 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 and demand of bonds. In general, fixed rate securities with longer maturities or durations are more sensitive to interest rate changes. 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 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 on 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. 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 the underlying instrument, in addition to other risks. Derivatives involve costs and can create economic leverage in the Funds 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 Funds 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. Derivatives also may present 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, 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. CDOs may be deemed to be illiquid securities and subject to the Funds restrictions on investments in illiquid securities. 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 Because the Fund can only distribute what it earns, 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. 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. 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. Currency Management Strategies Currency management strategies may substantially change the Funds 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 Funds exposure to currency risks, may also reduce the Funds ability to benefit from favorable changes in currency exchange rates. Using currency management strategies for purposes other than hedging further increases the Funds 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 governments 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 Funds 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 and currency markets, including: delays in settling portfolio 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 securitys 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. 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. 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 Funds ability to sell such securities or other investments when necessary to meet the Funds liquidity needs, in response to a specific economic event or to buy particular securities to invest available cash or when considered advantageous by the investment manager. Reduced liquidity will also generally lower the value of such securities or other investments. Market prices for such securities or other investments may be 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. 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. Portfolio Turnover The investment manager will sell a security when it believes it is appropriate to do so, regardless of how long the Fund has held the security. The Fund's turnover rate may exceed 100% per year because of the anticipated use of certain investment strategies. The rate of portfolio turnover will not be a limiting factor for the investment manager in making decisions on when to buy or sell securities, including entering into mortgage dollar rolls. High turnover will increase the Fund's transaction costs and may increase your tax liability if the transactions result in capital gains. |
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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. |
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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 |
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Performance Table Heading | rr_PerformanceTableHeading | <div><p>Average Annual Total Returns<br/>(figures reflect sales charges)</p><p>For the periods ended December 31, 2017</p></div> | ||||||||||||
Performance Table Closing [Text Block] | rr_PerformanceTableClosingTextBlock | 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. |
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Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Class A | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | 4.25% | [1] | |||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | [1] | |||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.47% | ||||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | ||||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.19% | [2] | |||||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | [3] | |||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.93% | [3] | |||||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.03%) | [4] | |||||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 0.90% | [3],[4] | |||||||||||
1 year | rr_ExpenseExampleYear01 | $ 513 | ||||||||||||
3 years | rr_ExpenseExampleYear03 | 706 | ||||||||||||
5 years | rr_ExpenseExampleYear05 | 915 | ||||||||||||
10 years | rr_ExpenseExampleYear10 | $ 1,517 | ||||||||||||
2008 | rr_AnnualReturn2008 | (5.48%) | ||||||||||||
2009 | rr_AnnualReturn2009 | 15.39% | ||||||||||||
2010 | rr_AnnualReturn2010 | 10.13% | ||||||||||||
2011 | rr_AnnualReturn2011 | 5.53% | ||||||||||||
2012 | rr_AnnualReturn2012 | 8.33% | ||||||||||||
2013 | rr_AnnualReturn2013 | (0.98%) | ||||||||||||
2014 | rr_AnnualReturn2014 | 5.98% | ||||||||||||
2015 | rr_AnnualReturn2015 | (1.59%) | ||||||||||||
2016 | rr_AnnualReturn2016 | 2.80% | ||||||||||||
2017 | rr_AnnualReturn2017 | 3.53% | ||||||||||||
Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best Quarter: | ||||||||||||
Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Sep. 30, 2009 | ||||||||||||
Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 6.20% | ||||||||||||
Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst Quarter: | ||||||||||||
Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Sep. 30, 2008 | ||||||||||||
Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (4.05%) | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Class C | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | [5] | |||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | [5] | |||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.47% | ||||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | 0.65% | ||||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.19% | [2] | |||||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | [3] | |||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 1.33% | [3] | |||||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.03%) | [4] | |||||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 1.30% | [3],[4] | |||||||||||
1 year | rr_ExpenseExampleYear01 | $ 232 | ||||||||||||
3 years | rr_ExpenseExampleYear03 | 418 | ||||||||||||
5 years | rr_ExpenseExampleYear05 | 726 | ||||||||||||
10 years | rr_ExpenseExampleYear10 | 1,600 | ||||||||||||
1 Year | rr_ExpenseExampleNoRedemptionYear01 | 132 | ||||||||||||
3 Years | rr_ExpenseExampleNoRedemptionYear03 | 418 | ||||||||||||
5 Years | rr_ExpenseExampleNoRedemptionYear05 | 726 | ||||||||||||
10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,600 | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Class R | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | ||||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.47% | ||||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | 0.50% | ||||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.19% | [2] | |||||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | [3] | |||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 1.18% | [3] | |||||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.03%) | [4] | |||||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 1.15% | [3],[4] | |||||||||||
1 year | rr_ExpenseExampleYear01 | $ 117 | ||||||||||||
3 years | rr_ExpenseExampleYear03 | 372 | ||||||||||||
5 years | rr_ExpenseExampleYear05 | 646 | ||||||||||||
10 years | rr_ExpenseExampleYear10 | $ 1,430 | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Class R6 | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | ||||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.47% | ||||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.05% | [2] | |||||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | [3] | |||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.54% | [3] | |||||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.03%) | [4] | |||||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 0.51% | [3],[4] | |||||||||||
1 year | rr_ExpenseExampleYear01 | $ 52 | ||||||||||||
3 years | rr_ExpenseExampleYear03 | 170 | ||||||||||||
5 years | rr_ExpenseExampleYear05 | 299 | ||||||||||||
10 years | rr_ExpenseExampleYear10 | $ 675 | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Advisor Class | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) | rr_MaximumCumulativeSalesChargeOverOfferingPrice | none | ||||||||||||
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||
Management fees | rr_ManagementFeesOverAssets | 0.47% | ||||||||||||
Distribution and service (12b-1) fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||
Other expenses | rr_OtherExpensesOverAssets | 0.19% | [2] | |||||||||||
Acquired fund fees and expenses | rr_AcquiredFundFeesAndExpensesOverAssets | 0.02% | [3] | |||||||||||
Total annual Fund operating expenses | rr_ExpensesOverAssets | 0.68% | [3] | |||||||||||
Fee waiver and/or expense reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.03%) | [4] | |||||||||||
Total annual Fund operating expenses after fee waiver and/or expense reimbursement | rr_NetExpensesOverAssets | 0.65% | [3],[4] | |||||||||||
1 year | rr_ExpenseExampleYear01 | $ 66 | ||||||||||||
3 years | rr_ExpenseExampleYear03 | 215 | ||||||||||||
5 years | rr_ExpenseExampleYear05 | 376 | ||||||||||||
10 years | rr_ExpenseExampleYear10 | $ 844 | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Return Before Taxes | Class A | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Total Return Fund | ||||||||||||
Label | rr_AverageAnnualReturnLabel | Return Before Taxes | ||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (0.88%) | ||||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 1.02% | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 3.75% | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Return Before Taxes | Class C | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 2.15% | ||||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 1.50% | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 3.78% | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Return Before Taxes | Class R | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 3.25% | ||||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 1.66% | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 3.94% | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Return Before Taxes | Class R6 | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 3.91% | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | |||||||||||||
Since Inception | rr_AverageAnnualReturnSinceInception | 2.04% | [6] | |||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Return Before Taxes | Advisor Class | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 3.70% | ||||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 2.16% | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 4.46% | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | After Taxes on Distributions | Class A | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Total Return Fund | ||||||||||||
Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions | ||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (1.79%) | ||||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | (0.26%) | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 2.13% | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | After Taxes on Distributions and Sales | Class A | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Column | rr_AverageAnnualReturnColumnName | Franklin Total Return Fund | ||||||||||||
Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions and Sale of Fund Shares | ||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | (0.50%) | ||||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 0.18% | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 2.24% | ||||||||||||
Franklin Investors Securities Trust - FIST2-26 | Franklin Total Return Fund | Bloomberg Barclays U.S. Aggregate Index (index reflects no deduction for fees, expenses or taxes) | ||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
Past 1 year | rr_AverageAnnualReturnYear01 | 3.54% | ||||||||||||
Past 5 years | rr_AverageAnnualReturnYear05 | 2.10% | ||||||||||||
Past 10 years | rr_AverageAnnualReturnYear10 | 4.00% | ||||||||||||
|
Label | Element | Value |
---|---|---|
Risk/Return: | rr_RiskReturnAbstract | |
Registrant Name | dei_EntityRegistrantName | FRANKLIN INVESTORS SECURITIES TRUST |
Prospectus Date | rr_ProspectusDate | Mar. 01, 2018 |
Document Creation Date | dei_DocumentCreationDate | Oct. 30, 2018 |
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