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Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName FRANKLIN INVESTORS SECURITIES TRUST
Prospectus Date rr_ProspectusDate Sep. 10, 2018
Risk/Return [Heading] rr_RiskReturnHeading Fund Summary
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Both income and capital appreciation.
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 $50,000 in Franklin Templeton funds. More information about these and other discounts is available from your financial professional and under “Your Account” on page 103 in the Fund's Prospectus and under “Buying and Selling Shares” on page 80 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in Appendix A - "Intermediary Sales Charge Discounts and Waivers" to the Fund's prospectus.

Please note that the tables and examples below do not reflect any transaction fees that may be charged by financial intermediaries, or commissions that a shareholder may be required to pay directly to its financial intermediary when buying or selling Class R6 or Advisor Class shares.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 34.99% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 34.99%
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 in a diversified portfolio of stocks (substantially dividend paying), convertible securities and debt securities. The Fund normally invests at least 25% of its total assets in debt securities, including bonds, notes, debentures and money market securities. In addition, the Fund normally invests at least 25% of its total assets in equity securities, primarily common and preferred stock. To the extent that the value of convertible and preferred securities can be attributed to their debt characteristics, they will be treated as debt securities for purposes of this investment policy.

The Fund seeks income by investing in a combination of corporate, agency and government bonds issued in the United States and other countries, as well as common stocks and convertible securities. The Fund seeks capital appreciation by investing in equity securities and convertible securities of companies from a variety of industries.

The Fund generally invests in investment grade debt securities. The Fund does not currently anticipate investing more than 25% of its total assets in securities of issuers domiciled outside the United States.

The Fund may, from time to time, seek to hedge (protect) against currency risks, using principally forward foreign currency exchange contracts, currency futures contracts, currency swaps and currency options, when, in the investment manager’s opinion, it would be advantageous to the Fund to do so. The Fund may use currency related derivative strategies for the purposes of hedging risks relating to changes in currency exchange rates and other market factors. The Fund may also, from time to time, seek to hedge against market risk or generate income, using a variety of equity-related derivative instruments, which may include purchasing or selling call and put options on equity securities and equity security indices, futures on equity securities and equity indexes and options on equity index futures. In addition, the Fund may enter into interest rate and credit-related transactions involving certain derivative instruments, including interest rate and credit default swaps and interest rate and/or bond futures contracts (including U.S. Treasury futures contracts) and options on credit default swaps. The use of such derivative transactions may allow the Fund to obtain net long or net short exposures to selected markets, interest rates, countries, durations or credit risks. The Fund may use equity, interest rate, credit-related or other derivative strategies for the purposes of enhancing Fund returns, increasing liquidity, gaining exposure to particular instruments in more efficient or less expensive ways and/or hedging risks relating to changes in currency exchange rates, certain equity markets, credit risks, interest rates and other market factors.

The Fund may invest up to 20% of its net assets in equity-linked notes, which are hybrid derivative-type instruments that are specially designed to combine the characteristics of one or more reference securities (usually a single stock, a stock index or a basket of stocks (underlying securities)) and a related equity derivative, such as a put or call option, in a single note form.

The investment manager applies a “bottom-up” approach to investing in individual securities. The investment manager will assess the market price of a company’s securities relative to the investment manager’s evaluation of the company’s long-term earnings, asset value and cash flow potential. The investment manager also considers a company’s price/earnings ratio, profit margins and liquidation value. In determining an optimal mix of equity and fixed-income investments for the Fund, the investment manager assesses changing economic, market and industry conditions.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests in a diversified portfolio of stocks (substantially dividend paying), convertible securities and debt 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.

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.

Stock prices tend to go up and down more dramatically than those of debt securities. A slower-growth or recessionary economic environment could have an adverse effect on the prices of the various stocks held by the Fund.

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.

Interest Rate

When interest rates rise, debt security prices generally fall. The opposite is also generally true: debt security prices rise when interest rates fall. Interest rate changes are influenced by a number of factors, including government policy, monetary policy, inflation expectations, perceptions of risk, and supply of and demand for bonds. In general, securities with longer maturities or durations are more sensitive to interest rate changes.

Income

Because the Fund can only distribute what it earns, the Fund's distributions to shareholders may decline when prevailing interest rates fall, when dividend income from investments in stocks decline, or when the Fund experiences defaults on debt securities it holds.

Equity-Linked Notes (ELNs)

ELNs may not perform as expected and could cause the Fund to realize significant losses including its entire principal investment. Other risks include counterparty risk, liquidity risk and imperfect correlation between ELNs and the underlying securities.

Foreign Securities (non-U.S.)

Investing in foreign securities, including sovereign debt 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.

Convertible Securities

Convertible securities are subject to the risks of stocks when the underlying stock price is high relative to the conversion price (because more of the security's value resides in the conversion feature) and debt securities when the underlying stock price is low relative to the conversion price (because the conversion feature is less valuable). A convertible security is not as sensitive to interest rate changes as a similar non-convertible debt security, and generally has less potential for gain or loss than the underlying stock.

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.

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 Fund’s portfolio which may result in significant volatility and cause the Fund to participate in losses (as well as gains) in an amount that exceeds the Fund’s initial investment. Other risks include illiquidity, mispricing or improper valuation of the derivative instrument, and imperfect correlation between the value of the derivative and the underlying instrument so that the Fund may not realize the intended benefits. When a derivative is used for hedging, the change in value of the derivative may also not correlate specifically with the currency, security, interest rate, index or other risk being hedged. Derivatives also may present the risk that the other party to the transaction will fail to perform.
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.

The secondary index in the table below shows how the Fund's performance compares to a group of securities that aligns with the fixed-income component of the Fund's portfolio.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Class A Annual Total Returns
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter:Q2'0918.86%
Worst Quarter:Q3'08-15.77%
Performance Table Heading rr_PerformanceTableHeading

Average Annual Total Returns
(figures reflect sales charges)

For the periods ended December 31, 2017
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

No one index is representative of the Fund's portfolio.

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.

The figures in the average annual total returns table above reflect the Class A maximum front-end sales charge of 5.75% that was in effect prior to September 10, 2018. Class A shares, however, currently are subject to a maximum front-end sales charge of 5.50% effective on September 10, 2018. If the maximum front-end sales charge of 5.50% was reflected, performance for Class A in the average annual total returns table would be higher.
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.50% [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 0.63%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.13% [2]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.03%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.01% [2],[3],[4]
1 year rr_ExpenseExampleYear01 $ 647
3 years rr_ExpenseExampleYear03 858
5 years rr_ExpenseExampleYear05 1,086
10 years rr_ExpenseExampleYear10 $ 1,739
2008 rr_AnnualReturn2008 (32.82%)
2009 rr_AnnualReturn2009 37.58%
2010 rr_AnnualReturn2010 15.13%
2011 rr_AnnualReturn2011 3.23%
2012 rr_AnnualReturn2012 12.57%
2013 rr_AnnualReturn2013 13.10%
2014 rr_AnnualReturn2014 7.47%
2015 rr_AnnualReturn2015 (2.85%)
2016 rr_AnnualReturn2016 11.98%
2017 rr_AnnualReturn2017 9.51%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.86%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (15.77%)
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced 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 0.63%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.13% [2]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.78%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.76% [2],[3],[4]
1 year rr_ExpenseExampleYear01 $ 279
3 years rr_ExpenseExampleYear03 558
5 years rr_ExpenseExampleYear05 963
10 years rr_ExpenseExampleYear10 2,095
1 Year rr_ExpenseExampleNoRedemptionYear01 179
3 Years rr_ExpenseExampleNoRedemptionYear03 558
5 Years rr_ExpenseExampleNoRedemptionYear05 963
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,095
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced 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 0.63%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.13% [2]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.28%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.26% [2],[3],[4]
1 year rr_ExpenseExampleYear01 $ 128
3 years rr_ExpenseExampleYear03 404
5 years rr_ExpenseExampleYear05 701
10 years rr_ExpenseExampleYear10 $ 1,545
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced 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 0.63%
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 0.70%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.68% [2],[3],[4]
1 year rr_ExpenseExampleYear01 $ 69
3 years rr_ExpenseExampleYear03 222
5 years rr_ExpenseExampleYear05 388
10 years rr_ExpenseExampleYear10 $ 869
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced 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 0.63%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.13% [2]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.78%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.76% [2],[3],[4]
1 year rr_ExpenseExampleYear01 $ 78
3 years rr_ExpenseExampleYear03 247
5 years rr_ExpenseExampleYear05 431
10 years rr_ExpenseExampleYear10 $ 965
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | Return Before Taxes | Class A  
Risk/Return: rr_RiskReturnAbstract  
Column rr_AverageAnnualReturnColumnName Franklin Balanced Fund
Label rr_AverageAnnualReturnLabel Return Before Taxes
Past 1 year rr_AverageAnnualReturnYear01 3.22%
Past 5 years rr_AverageAnnualReturnYear05 6.41%
Past 10 years rr_AverageAnnualReturnYear10 5.37%
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | Return Before Taxes | Class C  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 7.79%
Past 5 years rr_AverageAnnualReturnYear05 6.90%
Past 10 years rr_AverageAnnualReturnYear10 5.25%
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | Return Before Taxes | Class R  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 9.30%
Past 5 years rr_AverageAnnualReturnYear05 7.45%
Past 10 years rr_AverageAnnualReturnYear10 5.79%
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | Return Before Taxes | Class R6  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 9.95%
Past 10 years rr_AverageAnnualReturnYear10
Since Inception rr_AverageAnnualReturnSinceInception 7.41% [6]
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | Return Before Taxes | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 9.85%
Past 5 years rr_AverageAnnualReturnYear05 7.98%
Past 10 years rr_AverageAnnualReturnYear10 6.30%
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | After Taxes on Distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
Column rr_AverageAnnualReturnColumnName Franklin Balanced Fund
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Past 1 year rr_AverageAnnualReturnYear01 1.77%
Past 5 years rr_AverageAnnualReturnYear05 5.07%
Past 10 years rr_AverageAnnualReturnYear10 4.13%
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | After Taxes on Distributions and Sales | Class A  
Risk/Return: rr_RiskReturnAbstract  
Column rr_AverageAnnualReturnColumnName Franklin Balanced Fund
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
Past 1 year rr_AverageAnnualReturnYear01 2.44%
Past 5 years rr_AverageAnnualReturnYear05 4.64%
Past 10 years rr_AverageAnnualReturnYear10 3.87%
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced Fund | S&P 500® Index (index reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 21.83%
Past 5 years rr_AverageAnnualReturnYear05 15.79%
Past 10 years rr_AverageAnnualReturnYear10 8.50%
Franklin Investors Securities Trust - FIST1-23 | Franklin Balanced 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%
[1] There is a 1% contingent deferred sales charge that applies to investments of $1 million or more (see "Investments of $1 Million or More" under "Choosing a Share Class") and purchases by certain retirement plans without an initial sales charge on shares sold within 18 months of purchase.
[2] Other expenses of the Fund have been restated to exclude non-recurring prior period expenses and for Class R6 shares, to reflect current fiscal year expenses. If the non-recurring prior period expenses were included in the table above, the amounts stated would have been greater. Consequently, the total annual Fund operating expenses differ from the ratio of expenses to average net assets shown in the Financial Highlights.
[3] Total annual Fund operating expenses differ from the ratio of expenses to average net assets shown in the Financial Highlights, which reflect the operating expenses of the Fund and do not include acquired fund fees and expenses.
[4] The investment manager has contractually agreed in advance to reduce (waive) its fee as a result of the Fund's investment in Franklin Templeton affiliated funds (acquired fund) for the next 12-month period. Contractual fee waiver and/or expense reimbursement agreements may not be changed or terminated during the time period set forth above.
[5] Effective October 5, 2018, Class C shares that have been held for 10 years or more will convert automatically into Class A shares later in the month of October 2018 and will be subject to Class A shares’ lower Rule 12b-1 fees. Thereafter, Class C shares of the Fund will convert automatically to Class A shares of the Fund on a monthly basis in the month of, or the month following, the 10-year anniversary of the Class C shares’ purchase date. Such conversions will be on the basis of the relative net asset values of the two classes, will not be subject to Class A shares’ sales charges and are not expected to be a taxable event for federal income tax purposes. Certain shares that are invested through retirement plans, omnibus accounts or in certain other instances may not automatically convert if the financial intermediary does not have the ability to track purchases to credit individual shareholders’ holding periods. (See “Your Account – Choosing a Shares Class – Sales Charges - Class C – Automatic Conversion of Class C Shares to Class A Shares After 10-Year Holding Period” for more information.)
[6] Since inception May 1, 2013.