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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Oct. 31, 2013
Registrant Name dei_EntityRegistrantName FRANKLIN INVESTORS SECURITIES TRUST
Central Index Key dei_EntityCentralIndexKey 0000809707
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Feb. 28, 2014
Document Effective Date dei_DocumentEffectiveDate Mar. 01, 2014
Prospectus Date rr_ProspectusDate Mar. 01, 2014
Risk/Return [Heading] rr_RiskReturnHeading Fund Summary
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 130 in the Fund's Prospectus and under “Buying and Selling Shares” on page 75 of the Fund’s Statement of Additional Information.
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 58.52% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 58.52%
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 $50,000 in Franklin Templeton funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
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 waiver and/or expense reimbursement 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.

For purposes of pursuing its investment goal, the Fund may from time to time enter into various equity-related transactions involving derivative instruments, including put and call options on equity securities and equity indices. The Fund may enter into equity-related derivatives transactions to hedge against market risk, to earn income (in the form of premiums received for writing options), to gain or increase exposure to certain equity securities or segments of the equity markets or to otherwise enhance Fund returns. For example, the Fund may write an option with a strike price that is generally equal to the price target at which the investment manager would sell (in the case of a call option) or purchase (in the case of a put option) a particular stock, and in return the Fund would earn a premium from the buyer of the option.

The Fund may invest up to 15% 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 owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. 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 and 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. In general, securities with longer maturities are more sensitive to these 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.

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.

Foreign Securities

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.

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.

Equity-Linked Notes (ELNs)

Investing in investment funds may be more costly to the Fund than if the Fund had invested in the underlying securities directly. Shareholders of the Fund will indirectly bear the fees and expenses (including management and advisory fees and other expenses) of the underlying investment funds. 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.

Derivative Instruments

The performance of derivative instruments depends largely on the performance of an underlying currency, security or index, and such instruments often have risks similar to their 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 used for hedging, the change in value of the derivative may also not correlate specifically with the currency, security or other risk being hedged. With over-the-counter derivatives, there is the risk that the other party to the transaction will fail to perform.
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, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

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.
Franklin Balanced Fund | S&P 500® Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 32.39%
5 Years rr_AverageAnnualReturnYear05 17.94%
Since Inception rr_AverageAnnualReturnSinceInception 7.30%
Franklin Balanced Fund | Barclays U.S. Aggregate Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.02%)
5 Years rr_AverageAnnualReturnYear05 4.44%
Since Inception rr_AverageAnnualReturnSinceInception 5.28%
Franklin Balanced Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.66% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.17% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.14%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.13% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 684
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 915
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,166
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,881
Annual Return 2007 rr_AnnualReturn2007 4.15%
Annual Return 2008 rr_AnnualReturn2008 (32.82%)
Annual Return 2009 rr_AnnualReturn2009 37.58%
Annual Return 2010 rr_AnnualReturn2010 15.13%
Annual Return 2011 rr_AnnualReturn2011 3.23%
Annual Return 2012 rr_AnnualReturn2012 12.57%
Annual Return 2013 rr_AnnualReturn2013 13.10%
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%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 6.56%
5 Years rr_AverageAnnualReturnYear05 14.42%
Since Inception rr_AverageAnnualReturnSinceInception 5.61%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 03, 2006
Franklin Balanced Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.07%
5 Years rr_AverageAnnualReturnYear05 13.13%
Since Inception rr_AverageAnnualReturnSinceInception 4.35%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 03, 2006
Franklin Balanced Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.33%
5 Years rr_AverageAnnualReturnYear05 11.27%
Since Inception rr_AverageAnnualReturnSinceInception 4.05%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 03, 2006
Franklin Balanced Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.66% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.17% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.84%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.83% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 286
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 578
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 995
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,159
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 186
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 578
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 995
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,159
1 Year rr_AverageAnnualReturnYear01 11.22%
5 Years rr_AverageAnnualReturnYear05 14.99%
Since Inception rr_AverageAnnualReturnSinceInception 5.71%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 03, 2006
Franklin Balanced Fund | Class R
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.66% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.17% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.34%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.33% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 135
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 424
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 733
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,612
1 Year rr_AverageAnnualReturnYear01 12.95%
5 Years rr_AverageAnnualReturnYear05 15.58%
Since Inception rr_AverageAnnualReturnSinceInception 6.27%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 03, 2006
Franklin Balanced Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.66% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.06% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.73%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.72% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 74
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 232
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 405
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 906
Franklin Balanced Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.66% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.17% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.84%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.83% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 85
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 267
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 465
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,037
1 Year rr_AverageAnnualReturnYear01 13.41%
5 Years rr_AverageAnnualReturnYear05 16.13%
Since Inception rr_AverageAnnualReturnSinceInception 6.77%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 03, 2006
Franklin Convertible Securities Fund
  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock To maximize total return, consistent with reasonable risk, by seeking to optimize capital appreciation and high current income under varying market conditions.
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 130 in the Fund's Prospectus and under “Buying and Selling Shares” on page 75 of the Fund’s Statement of Additional Information.
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 34.69% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 34.69%
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 $50,000 in Franklin Templeton funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount 50,000
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. 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 at least 80% of its net assets in convertible securities (and common stock received upon conversion of convertible securities). A convertible security is generally a debt security or preferred stock that may be converted within a specified period of time into common stock of the same or a different issuer. By investing in convertible securities, the Fund seeks the opportunity to participate in the capital appreciation of underlying stocks, while at the same time relying on the fixed income aspect of the convertible securities to provide current income and reduced price volatility, which can limit the risk of loss in a down equity market.

A convertible security shares features of both equity and debt securities. Like an equity security, the value of a convertible security tends to increase as the price of the underlying stock goes up, and to decrease as the price of the underlying stock goes down. Like a debt security, a convertible security provides a fixed income stream and also tends to increase in value when interest rates fall and decrease in value when interest rates rise.

When choosing convertible securities for this Fund, the investment manager attempts to maintain a balance in the portfolio between the equity and debt characteristics of convertible securities with an emphasis on the equity features. The investment manager also considers the company’s long-term earnings, asset value and cash flow potential. Some of the convertible securities in which the Fund may invest have been structured to provide enhanced yield, increased equity exposure, or enhanced downside protection. These securities typically provide a benefit to the issuer in exchange for the enhanced features, such as a conversion premium that is paid by the Fund. The Fund may invest in convertible securities of companies of any capitalization size, but generally seeks to make its portfolio representative of the entire convertible securities market.

Convertible securities generally fall within the lower-rated categories as determined by securities rating organizations. Therefore, the Fund may invest up to 100% of its assets in securities that are rated below investment grade; however, the Fund will not invest more than 10% of its assets in securities rated below B or in unrated securities of comparable quality. The Fund may invest up to 20% of its net assets in other securities, such as common or preferred stocks and non-convertible debt securities.

While the Fund does not concentrate in any one industry, from time to time, based on economic conditions, it may make significant investments in certain sectors.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests at least 80% of its net assets in convertible securities (and common stock received upon conversion of convertible 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.

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.

Credit

An issuer of debt securities may fail to make interest payments and 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 called “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 and 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.

Liquidity

From time to time, the trading market for a particular security or type of security in which the Fund invests may become less liquid or even illiquid. Reduced liquidity will have an adverse impact on the Fund’s ability to sell such securities when necessary to meet the Fund’s liquidity needs or in response to a specific economic event and will also generally lower the value of a security. Market prices for such securities may be volatile.

Market

The market values of securities owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. 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.

Income

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

Focus

To the extent that the Fund focuses on particular countries, regions, industries, sectors or types of investment from time to time, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of countries, regions, industries, sectors or investments.

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. In general, securities with longer maturities are more sensitive to these interest rate changes.

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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You can obtain updated performance information at franklintempleton.com or by calling (800) DIAL BEN/342-5236.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading CLASS A ANNUAL TOTAL RETURNS
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter:Q3'0917.53%
Worst Quarter:Q4'08-19.73%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

Historical performance for Advisor Class shares prior to their inception is based on the performance of Class A shares. Advisor Class performance has been adjusted to reflect differences in sales charges between classes.

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Convertible Securities Fund | BofA Merrill Lynch All Total Return Alternatives U.S. Convertibles Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 26.33%
5 Years rr_AverageAnnualReturnYear05 22.32%
10 Years rr_AverageAnnualReturnYear10 8.01%
Franklin Convertible Securities Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.16%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.88%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 660
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 840
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,035
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,597
Annual Return 2004 rr_AnnualReturn2004 16.02%
Annual Return 2005 rr_AnnualReturn2005 6.93%
Annual Return 2006 rr_AnnualReturn2006 12.15%
Annual Return 2007 rr_AnnualReturn2007 0.50%
Annual Return 2008 rr_AnnualReturn2008 (35.38%)
Annual Return 2009 rr_AnnualReturn2009 49.72%
Annual Return 2010 rr_AnnualReturn2010 20.50%
Annual Return 2011 rr_AnnualReturn2011 (5.58%)
Annual Return 2012 rr_AnnualReturn2012 13.39%
Annual Return 2013 rr_AnnualReturn2013 23.20%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.53%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.73%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 16.11%
5 Years rr_AverageAnnualReturnYear05 17.54%
10 Years rr_AverageAnnualReturnYear10 7.32%
Franklin Convertible Securities Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.90%
5 Years rr_AverageAnnualReturnYear05 16.12%
10 Years rr_AverageAnnualReturnYear10 5.64%
Franklin Convertible Securities Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.28%
5 Years rr_AverageAnnualReturnYear05 13.61%
10 Years rr_AverageAnnualReturnYear10 5.23%
Franklin Convertible Securities Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.16%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.63%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 266
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 514
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 887
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,933
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 166
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 514
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 887
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,933
1 Year rr_AverageAnnualReturnYear01 21.31%
5 Years rr_AverageAnnualReturnYear05 18.05%
10 Years rr_AverageAnnualReturnYear10 7.15%
Franklin Convertible Securities Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.05%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.52%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 53
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 167
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 291
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 653
Franklin Convertible Securities Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.16%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.63%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 64
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 202
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 351
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 786
1 Year rr_AverageAnnualReturnYear01 23.50%
5 Years rr_AverageAnnualReturnYear05 19.23%
10 Years rr_AverageAnnualReturnYear10 8.11%
Franklin Equity Income Fund
  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock To maximize total return by emphasizing high current income and long-term capital appreciation, consistent with reasonable risk.
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 130 in the Fund's Prospectus and under “Buying and Selling Shares” on page 75 of the Fund’s Statement of Additional Information.
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 33.18% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 33.18%
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 $50,000 in Franklin Templeton funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount 50,000
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. 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 equity securities, including securities convertible into common stocks. The Fund may also invest up to 20% of its net assets in debt securities, including any combination of the following investments: corporate, agency and government bonds issued in the United States and other countries; notes and debentures (collectively with bonds referred to as debt securities). The Fund does not presently intend to invest in any below investment grade bonds that are not convertible bonds. The Fund generally invests between 60% and 80% of its net assets in common stocks, and the remainder of its assets in other instruments such as convertible securities and debt securities.

The Fund may invest in foreign securities including emerging markets, but does not currently anticipate investing more than 25% of its total assets in securities of issuers domiciled outside the United States.

While the Fund does not concentrate in any one industry, from time to time, based on economic conditions, it may make significant investments in certain sectors.

The Fund’s strategy is to invest in a broadly diversified portfolio of equity securities that the Fund’s investment manager considers to be financially strong, with a focus on "blue chip" companies. 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, balance sheet and liquidation value. The Fund’s investment manager considers dividend yield in selecting stocks for the Fund because the investment manager believes that, over time, dividend income can contribute significantly to total return and can be a more consistent source of investment return than capital appreciation.
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 owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. 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.

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.

Blend Style Investing

A “blend” strategy results in investments in both growth and value stocks, or in stocks with characteristics of both. Growth stock prices reflect projections of future earnings or revenues and can fall dramatically if the company fails to meet those projections. With respect to value stocks, if other investors fail to recognize the company’s value, or favor investing in faster-growing companies, value stocks may not increase in value as anticipated by the Fund's investment manager or may decline even further.

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.

Focus

To the extent that the Fund focuses on particular countries, regions, industries, sectors or types of investment from time to time, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of countries, regions, industries, sectors or investments.

Foreign Securities

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. The risks of investing in foreign securities are typically greater in less developed or emerging market countries.

Credit

An issuer of debt securities may fail to make interest payments and 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 called “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 and 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.

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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You can obtain updated performance information at franklintempleton.com or by calling (800) DIAL BEN/342-5236.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading CLASS A ANNUAL TOTAL RETURNS
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter:Q3'0914.46%
Worst Quarter:Q4'08-18.98%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

Historical performance for Advisor Class shares prior to their inception is based on the performance of Class A shares. Advisor Class performance has been adjusted to reflect differences in sales charges between classes.

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Equity Income Fund | S&P 500® Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 32.39%
5 Years rr_AverageAnnualReturnYear05 17.94%
10 Years rr_AverageAnnualReturnYear10 7.40%
Franklin Equity Income Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.91%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 663
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 848
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,050
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,630
Annual Return 2004 rr_AnnualReturn2004 10.47%
Annual Return 2005 rr_AnnualReturn2005 3.21%
Annual Return 2006 rr_AnnualReturn2006 16.36%
Annual Return 2007 rr_AnnualReturn2007 (3.55%)
Annual Return 2008 rr_AnnualReturn2008 (35.36%)
Annual Return 2009 rr_AnnualReturn2009 26.42%
Annual Return 2010 rr_AnnualReturn2010 15.86%
Annual Return 2011 rr_AnnualReturn2011 1.47%
Annual Return 2012 rr_AnnualReturn2012 11.85%
Annual Return 2013 rr_AnnualReturn2013 29.28%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.46%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.98%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 21.84%
5 Years rr_AverageAnnualReturnYear05 15.16%
10 Years rr_AverageAnnualReturnYear10 5.30%
Franklin Equity Income Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 21.00%
5 Years rr_AverageAnnualReturnYear05 14.59%
10 Years rr_AverageAnnualReturnYear10 4.64%
Franklin Equity Income Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.94%
5 Years rr_AverageAnnualReturnYear05 12.26%
10 Years rr_AverageAnnualReturnYear10 4.31%
Franklin Equity Income Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.66%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 269
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 523
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 902
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,965
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 169
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 523
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 902
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,965
1 Year rr_AverageAnnualReturnYear01 27.40%
5 Years rr_AverageAnnualReturnYear05 15.67%
10 Years rr_AverageAnnualReturnYear10 5.13%
Franklin Equity Income Fund | Class R
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.16%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 118
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 368
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 638
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,409
1 Year rr_AverageAnnualReturnYear01 29.02%
5 Years rr_AverageAnnualReturnYear05 16.25%
10 Years rr_AverageAnnualReturnYear10 5.65%
Franklin Equity Income Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.02% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.49%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 50
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 157
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 274
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 616
Franklin Equity Income Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.66%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 67
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 211
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 368
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 822
1 Year rr_AverageAnnualReturnYear01 29.69%
5 Years rr_AverageAnnualReturnYear05 16.84%
10 Years rr_AverageAnnualReturnYear10 6.08%
Franklin Limited Maturity U.S. Government Securities Fund
  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock As high a level of current income as is consistent with prudent investing, while seeking preservation of shareholders’ 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 130 in the Fund's Prospectus and under “Buying and Selling Shares” on page 75 of the Fund’s Statement of Additional Information.
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 92.56% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 92.56%
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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests at least 80% of its net assets in securities with a dollar-weighted average maturity of less than 10 years and issued or guaranteed by the U.S. government, its agencies, or instrumentalities. The Fund generally invests a substantial portion of its assets in mortgage-backed securities including adjustable rate mortgage securities (ARMs), but the Fund also invests in direct obligations of the U.S. government (such as Treasury bonds, bills and notes) and in securities issued or guaranteed by the U.S. government, its agencies or instrumentalities, including government sponsored entities. All of the Fund’s principal investments are debt securities, including bonds, notes and debentures.

The Fund currently maintains the average dollar-weighted maturity of its fixed-rate portfolio in a range of one to five years. The average dollar-weighted maturity of the Fund will vary with market conditions and the outlook for interest rates.

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. As the underlying mortgage loans are paid off, investors receive periodic principal and interest payments as well as any unscheduled principal prepayments on the underlying mortgage loans. The mortgage-backed securities purchased by the Fund include, but are not limited to, bonds and notes issued or guaranteed by the Government National Mortgage Association (Ginnie Mae) and U.S. government-sponsored entities, such as Fannie Mae and Freddie Mac.

Government agency or instrumentality issues have different levels of credit support. Ginnie Mae pass-through mortgage certificates are backed by the full faith and credit of the U.S. government. U.S. government-sponsored entities, such as Fannie Mae and Freddie Mac, are chartered by Acts of Congress, but their securities are neither issued nor guaranteed by the U.S. government. Although the U.S. government has recently provided financial support to Fannie Mae and Freddie Mac, no assurance can be given that the U.S. government will continue to do so. The Fund may invest in obligations of other U.S. government-sponsored entities, which may be supported only by the credit of the issuing agency or instrumentality, such as securities issued by members of the Farm Credit System. Accordingly, securities issued by Fannie Mae, Freddie Mac, the Farm Credit System, and similar securities may involve a risk of non-payment of principal and interest. Investors should remember that guarantees of timely prepayment of principal and interest do not apply to the market prices and yields of the securities or to the net asset value or performance of the Fund, which will vary with changes in interest rates and other market conditions.

The Fund may also invest in U.S. inflation-indexed securities issued by governments and municipal issuers.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests at least 80% of its net assets in securities with a dollar-weighted average maturity of less than 10 years and issued or guaranteed by the U.S. government, its agencies, or instrumentalities.
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. In general, securities with longer maturities are more sensitive to these 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. If the changes in market rates are substantial, the interest rate on a variable rate security may not reset during a single adjustment period. Lifetime limits on resets may also prevent their rates from adjusting 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 or when the Fund experiences defaults on debt securities it holds.

Mortgage-Backed Securities

Mortgage-backed 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-backed 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-backed 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.

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.

Credit

An issuer of debt securities may fail to make interest payments and 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. While securities issued by Ginnie Mae are backed by the full faith and credit of the U.S. government, not all securities of the various U.S. government agencies are, including those of Fannie Mae and Freddie Mac. Also guarantees of principal and interest do not apply to market prices, yields or the Fund’s share price. While the U.S. government has provided financial support to Fannie Mae and Freddie Mac, no assurance can be given that the U.S. government will always do so, since the U.S. government is not so obligated by law. Some securities issued by government agencies, instrumentalities or government sponsored entities are only backed by the credit worthiness of those institutions, not the U.S. government. Investments in such securities include greater risk of non-payment of principal and interest than other U.S. government securities.

Inflation-Indexed Securities

Inflation-indexed securities have a tendency to react to changes in real interest rates. Real interest rates represent nominal (stated) interest rates lowered by the anticipated effect of inflation. In general, the price of an inflation-indexed security decreases when real interest rates increase, and increases when real interest rates decrease. Interest payments on inflation-indexed securities will fluctuate as the principal and/or interest is adjusted for inflation and can be unpredictable.

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.

Market

The market values of securities owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. When there are more sellers than buyers, prices tend to fall. Likewise, when there are more buyers than sellers, prices tend to rise.
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 more closely with the Fund's investment strategies.

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:Q4'084.46%
Worst Quarter:Q2'04-1.76%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

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.
Franklin Limited Maturity U.S. Government Securities Fund | Barclays U.S. Treasury Index: 1-5 Year Component
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.14%)
5 Years rr_AverageAnnualReturnYear05 1.60%
10 Years rr_AverageAnnualReturnYear10 3.10%
Franklin Limited Maturity U.S. Government Securities Fund | Barclays U.S. Treasury Index: 1-3 Year Component
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.36%
5 Years rr_AverageAnnualReturnYear05 1.11%
10 Years rr_AverageAnnualReturnYear10 2.57%
Franklin Limited Maturity U.S. Government Securities Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 2.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.10%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.79%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 304
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 472
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 654
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,181
Annual Return 2004 rr_AnnualReturn2004 1.21%
Annual Return 2005 rr_AnnualReturn2005 0.72%
Annual Return 2006 rr_AnnualReturn2006 3.57%
Annual Return 2007 rr_AnnualReturn2007 6.65%
Annual Return 2008 rr_AnnualReturn2008 7.18%
Annual Return 2009 rr_AnnualReturn2009 2.89%
Annual Return 2010 rr_AnnualReturn2010 2.98%
Annual Return 2011 rr_AnnualReturn2011 1.69%
Annual Return 2012 rr_AnnualReturn2012 0.79%
Annual Return 2013 rr_AnnualReturn2013 (0.29%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2008
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 4.46%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2004
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (1.76%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (2.58%)
5 Years rr_AverageAnnualReturnYear05 1.14%
10 Years rr_AverageAnnualReturnYear10 2.48%
Franklin Limited Maturity U.S. Government Securities Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (3.45%)
5 Years rr_AverageAnnualReturnYear05 0.24%
10 Years rr_AverageAnnualReturnYear10 1.37%
Franklin Limited Maturity U.S. Government Securities Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (1.46%)
5 Years rr_AverageAnnualReturnYear05 0.56%
10 Years rr_AverageAnnualReturnYear10 1.50%
Franklin Limited Maturity U.S. Government Securities Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.04% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.54%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 55
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 173
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 302
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 677
Franklin Limited Maturity U.S. Government Securities Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.69%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 70
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 221
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 384
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 859
1 Year rr_AverageAnnualReturnYear01 (0.10%)
5 Years rr_AverageAnnualReturnYear05 1.72%
10 Years rr_AverageAnnualReturnYear10 2.83%
Franklin Real Return Fund
  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Total return that exceeds the rate of inflation over an economic cycle.
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 130 in the Fund's Prospectus and under “Buying and Selling Shares” on page 75 of the Fund’s Statement of Additional Information.
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 27.91% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 27.91%
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 waiver and/or expense reimbursement 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 seeks to allocate assets among investments to achieve the highest level of real return (total return less the rate of inflation) consistent with an acceptable level of risk. The Fund shifts its investments among the following general asset classes: inflation-indexed securities issued by governments, corporations and municipal issuers; investment grade and high-yield fixed-income securities issued by governments, corporations and municipal issuers; equity securities with high correlation to broad measures of inflation; and short-term non-dollar denominated debt securities.

Inflation-indexed securities are fixed-income securities that are structured to provide protection against inflation. The value of the security’s principal or the interest income paid on the security is adjusted to track changes in an official inflation measure. The U.S. Treasury uses the Consumer Price Index for Urban Consumers as the inflation measure. Inflation-indexed securities issued by a foreign government are generally adjusted to reflect a comparable inflation index, calculated by that government.

The Fund invests primarily in investment grade debt securities; however, the Fund may invest up to 20% of its total assets in below investment grade debt securities.

The Fund may also invest up to 25% of its total assets in foreign securities, including both securities denominated in foreign currencies and U.S. dollar denominated securities of foreign issuers. For purposes of pursuing its investment goal, the Fund may enter into currency-related transactions involving certain derivative instruments, including currency and cross currency forwards. The use of derivative currency transactions may allow the Fund to reduce a specific risk exposure of a portfolio security or its denominated currency or to obtain net long exposure to selected currencies.

The Fund uses an active asset allocation strategy to try to achieve its goal of total return that exceeds the rate of inflation over an economic cycle by allocating its assets among securities in various market sectors based on the investment manager’s assessment of changing economic, global market, industry, and issuer conditions. The investment manager uses a “top-down” analysis of macroeconomic trends combined with a “bottom-up” fundamental analysis of market sectors, industries, and issuers to try to take advantage of varying sector reactions to economic events. The investment manager will evaluate country risk, business cycles, yield curves, and values between and within markets.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund seeks to allocate assets among investments to achieve the highest level of real return (total return less the rate of inflation) consistent with an acceptable level of risk.
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. In general, securities with longer maturities are more sensitive to these interest rate changes.

Inflation-Indexed Securities

Inflation-indexed securities have a tendency to react to changes in real interest rates. Real interest rates represent nominal (stated) interest rates lowered by the anticipated effect of inflation. In general, the price of an inflation-indexed security decreases when real interest rates increase, and increases when real interest rates decrease. Interest payments on inflation-indexed securities will fluctuate as the principal and/or interest is adjusted for inflation and can be unpredictable.

Foreign Securities

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.

Credit

An issuer of debt securities may fail to make interest payments and 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 called “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 and 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.

Income

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

Derivative Instruments

The performance of derivative instruments depends largely on the performance of an underlying instrument, such as a currency, security or index, and derivative 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 significantly 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 used for hedging, the change in value of the derivative may also not correlate specifically with the currency, security or other risk being hedged. Derivatives also present the risk that the other party to the transaction will fail to perform.

Market

The market values of securities owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. 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.

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.
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 the Consumer Price Index for All Urban Consumers, which is the inflation measure used by the U.S. Treasury.

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:Q1'083.88%
Worst Quarter:Q3'11-5.51%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

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

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

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Real Return Fund | Barclays U.S. TIPS Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (8.61%)
5 Years rr_AverageAnnualReturnYear05 5.63%
Since Inception rr_AverageAnnualReturnSinceInception 4.53%
Franklin Real Return Fund | Consumer Price Index for All Urban Consumers - Non-Seasonally Adjusted (CPI-NSA)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.50%
5 Years rr_AverageAnnualReturnYear05 2.08%
Since Inception rr_AverageAnnualReturnSinceInception 2.21%
Franklin Real Return Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 4.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.62% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.21% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.10%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.92% [5],[8]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 515
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 743
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 989
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,693
Annual Return 2005 rr_AnnualReturn2005 3.81%
Annual Return 2006 rr_AnnualReturn2006 5.20%
Annual Return 2007 rr_AnnualReturn2007 10.21%
Annual Return 2008 rr_AnnualReturn2008 (4.49%)
Annual Return 2009 rr_AnnualReturn2009 11.43%
Annual Return 2010 rr_AnnualReturn2010 6.03%
Annual Return 2011 rr_AnnualReturn2011 0.54%
Annual Return 2012 rr_AnnualReturn2012 3.68%
Annual Return 2013 rr_AnnualReturn2013 0.15%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2008
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.88%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (5.51%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (4.09%)
5 Years rr_AverageAnnualReturnYear05 3.39%
Since Inception rr_AverageAnnualReturnSinceInception 3.53%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 17, 2004
Franklin Real Return Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.85%)
5 Years rr_AverageAnnualReturnYear05 2.52%
Since Inception rr_AverageAnnualReturnSinceInception 2.38%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 17, 2004
Franklin Real Return Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.28%)
5 Years rr_AverageAnnualReturnYear05 2.32%
Since Inception rr_AverageAnnualReturnSinceInception 2.33%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 17, 2004
Franklin Real Return Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.62% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.65%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.21% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.50%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.32% [5],[8]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 234
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 456
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 801
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,775
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 134
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 456
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 801
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,775
1 Year rr_AverageAnnualReturnYear01 (1.30%)
5 Years rr_AverageAnnualReturnYear05 3.87%
Since Inception rr_AverageAnnualReturnSinceInception 3.39%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 17, 2004
Franklin Real Return Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.62% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.08% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.72%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.54% [5],[8]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 55
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 580
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,132
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,641
Franklin Real Return Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.62% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.21% [3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.85%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.67% [5],[8]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 68
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 253
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 454
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,032
1 Year rr_AverageAnnualReturnYear01 0.29%
5 Years rr_AverageAnnualReturnYear05 4.56%
Since Inception rr_AverageAnnualReturnSinceInception 4.28%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 17, 2004
Franklin Adjustable U.S. Government Securities Fund
  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock High level of current income, while providing lower volatility of principal than a fund that invests in fixed-rate securities.
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 127 in the Fund's Prospectus and under “Buying and Selling Shares” on page 79 of the Fund’s Statement of Additional Information.
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 8.66% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 8.66%
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. 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 at least 80% of its net assets in “adjustable-rate U.S. government mortgage securities.” “Adjustable-rate U.S. government mortgage securities” include adjustable-rate mortgage securities (ARMS) and other mortgage-backed securities with interest rates that adjust periodically to reflect prevailing market interest rates, which are issued or guaranteed by the U.S. government, its agencies or instrumentalities, including government sponsored entities.

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. As the underlying mortgage loans are paid off, investors receive periodic principal and interest payments as well as any unscheduled principal prepayments on the underlying mortgage loans. The mortgage-backed securities purchased by the Fund may include bonds and notes issued or guaranteed by U.S. government-sponsored entities, such as the Federal National Mortgage Association (Fannie Mae) and the Federal Home Loan Mortgage Corporation (Freddie Mac) and by the Government National Mortgage Association (Ginnie Mae). The Fund currently focuses on mortgage-backed securities issued or guaranteed by Fannie Mae and Freddie Mac.

Government agency or instrumentality issues have different levels of credit support. Ginnie Mae pass-through mortgage certificates are backed by the full faith and credit of the U.S. government. U.S. government-sponsored entities, such as Fannie Mae and Freddie Mac, may be chartered by Acts of Congress, but their securities are neither issued nor guaranteed by the U.S. government. Although the U.S. government has provided financial support to Fannie Mae and Freddie Mac, no assurance can be given that the U.S. government will continue to do so. Accordingly, securities issued by Fannie Mae and Freddie Mac may involve a risk of non-payment of principal and interest. Investors should remember that guarantees of timely prepayment of principal and interest do not apply to the market prices and yields of the securities or to the net asset value or performance of the Fund, which will vary with changes in interest rates and other market conditions. Any downgrade of the credit rating of the securities issued by the U.S. government may result in a downgrade of securities issued by its agencies or instrumentalities, including government-sponsored entities.

Periodic interest rate adjustments may help keep the prices of ARMS relatively stable when compared with the prices of fixed-rate securities, which generally fall when interest rates rise. As a result, the Fund may participate in increases in interest rates resulting in higher current yields, but with less fluctuation in net asset value than a fund invested in comparable fixed-rate securities. Adjustable-rate securities, however, frequently limit the maximum amount by which the interest rate may change up or down. The Fund, therefore, may not benefit from increases in interest rates if prevailing interest rates exceed a security's maximum allowable periodic or lifetime limits. During periods of falling interest rates, the interest rates on these securities may reset downward, resulting in a lower yield for the Fund.

The Fund may invest up to 20% of its net assets in other securities, including fixed-rate mortgage-backed securities, mortgage-backed securities issued by a private entity, direct obligations of the U.S. government, such as Treasury bills, bonds or notes, and repurchase agreements collateralized by U.S. government or government agency securities.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests at least 80% of its net assets in “adjustable-rate U.S. government mortgage 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. In general, securities with longer maturities are more sensitive to these interest rate changes.

Mortgage-Backed Securities

Mortgage-backed 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-backed 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-backed 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.

Extension Risk

Some debt securities, particularly mortgage-backed securities, are subject to the risk that the debt security’s effective maturity is extended because calls or prepayments are less or slower than anticipated, particularly when interest rates rise. The market value of such security may then decline and become more interest rate sensitive.

Prepayment

Prepayment risk occurs when a debt security can be repaid in whole or in part prior to the security's maturity and the Fund must reinvest the proceeds it receives, during periods of declining interest rates, in securities that pay a lower rate of interest.

Adjustable Rate Securities

Because changes in interest rates on adjustable 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. If the changes in market rates are substantial, the interest rate on an adjustable rate security may not reset to market rates during a single adjustment period. Lifetime limits on resets may also prevent their rates from adjusting to market rates.

During periods of declining interest rates, because the interest rates on adjustable rate securities generally reset downward, their market value is unlikely to rise to the same extent as the value of comparable fixed rate securities.

Credit

An issuer of debt securities may fail to make interest payments and 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. While securities issued by Ginnie Mae are backed by the full faith and credit of the U.S. government, not all securities of the various U.S. government agencies are, including those of Fannie Mae and Freddie Mac. While the U.S. government has provided financial support to Fannie Mae and Freddie Mac, no assurance can be given that the U.S. government will always do so, since the U.S. government is not so obligated by law. Accordingly, securities issued by Fannie Mae and Freddie Mac may involve a risk of non-payment of principal and interest. Also, guarantees of principal and interest do not apply to market prices, yields or the Fund’s share price. Any downgrade of the credit rating of the securities issued by the U.S. government may result in a downgrade of securities issued by its agencies or instrumentalities, including government-sponsored entities.

Income

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

Market

The market values of securities owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You can obtain updated performance information at franklintempleton.com or by calling (800) DIAL BEN/342-5236.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading CLASS A ANNUAL TOTAL RETURNS
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter:Q1'091.72%
Worst Quarter:Q4'12-0.39%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class A1 and Class R6 shares are not shown because Class A1 had not commenced operations and Class R6 did not have a full calendar year of operations as of the date of this prospectus.

Historical performance for Advisor Class shares prior to their inception is based on the performance of Class A shares. Advisor Class performance has been adjusted to reflect differences in sales charges between classes.

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Adjustable U.S. Government Securities Fund | Barclays U.S. Government Index: 1-2 Year Component
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.39%
5 Years rr_AverageAnnualReturnYear05 0.94%
10 Years rr_AverageAnnualReturnYear10 2.41%
Franklin Adjustable U.S. Government Securities Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 2.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.12% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.87%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 312
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 496
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 696
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,273
Annual Return 2004 rr_AnnualReturn2004 1.79%
Annual Return 2005 rr_AnnualReturn2005 2.06%
Annual Return 2006 rr_AnnualReturn2006 4.15%
Annual Return 2007 rr_AnnualReturn2007 5.03%
Annual Return 2008 rr_AnnualReturn2008 3.58%
Annual Return 2009 rr_AnnualReturn2009 4.35%
Annual Return 2010 rr_AnnualReturn2010 1.29%
Annual Return 2011 rr_AnnualReturn2011 1.72%
Annual Return 2012 rr_AnnualReturn2012 1.42%
Annual Return 2013 rr_AnnualReturn2013 (0.16%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.72%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2012
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.39%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (2.37%)
5 Years rr_AverageAnnualReturnYear05 1.26%
10 Years rr_AverageAnnualReturnYear10 2.28%
Franklin Adjustable U.S. Government Securities Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.97%)
5 Years rr_AverageAnnualReturnYear05 0.51%
10 Years rr_AverageAnnualReturnYear10 1.20%
Franklin Adjustable U.S. Government Securities Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (1.34%)
5 Years rr_AverageAnnualReturnYear05 0.70%
10 Years rr_AverageAnnualReturnYear10 1.36%
Franklin Adjustable U.S. Government Securities Fund | Class A1
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 2.25% [9]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [7],[9]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [10],[2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.10% [10]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.12% [10],[3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.72% [10]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 297
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 450
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 617
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,099
Franklin Adjustable U.S. Government Securities Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.65%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.12% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.27%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 229
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 403
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 697
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,534
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 129
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 403
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 697
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,534
1 Year rr_AverageAnnualReturnYear01 (1.65%)
5 Years rr_AverageAnnualReturnYear05 1.28%
10 Years rr_AverageAnnualReturnYear10 2.09% [11]
Franklin Adjustable U.S. Government Securities Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [12]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [12]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.04% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.54%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 55
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 173
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 302
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 677
Franklin Adjustable U.S. Government Securities Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.12% [3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.62%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 63
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 199
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 346
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 774
1 Year rr_AverageAnnualReturnYear01 0.09%
5 Years rr_AverageAnnualReturnYear05 1.97%
10 Years rr_AverageAnnualReturnYear10 2.67% [13]
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 127 in the Fund's Prospectus and under “Buying and Selling Shares” on page 79 of the Fund’s Statement of Additional Information.
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 42.72% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 42.72%
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 waiver and/or expense reimbursement 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, generally have credit ratings below investment grade and may be subject to restrictions on resale. The Fund invests at least 75% of its net assets in corporate loans and corporate debt securities 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 Fund’s investment manager. The Fund may invest up to 25% of its net assets in corporate loans and corporate debt securities 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 will typically hold the most senior position in the capitalization structure of the company and be secured by specific collateral. Such senior position means that, in case the company becomes insolvent, the lenders or securityholders in a senior position like the Fund will typically be paid before other creditors of the corporation 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 on the obligation. The investment manager performs its own independent credit analysis of each borrower and of the collateral structure securing the Fund’s investment. The investment manager also will consider 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.

Some covenant lite loans may be in the market from time to time which tend to have fewer or no financial maintenance covenants and restrictions. A covenant lite loan typically contains fewer clauses which allow an investor to monitor the performance of a company. Covenant lite loans also generally provide fewer investor protections if certain criteria are breached. The Fund may experience losses or delays in enforcing its rights on its holdings of covenant lite loans.

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 predominately in loans or securities 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 these 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 total assets in loans where firms in such industry group are borrowers, agent banks or intermediate participants.

In addition to the Fund’s main investments, the Fund may invest up to 20% of its net assets in certain other types of debt obligations or securities, including secured 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.
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 and 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

The floating rate corporate loans and corporate debt securities in which the Fund invests generally have credit ratings below investment grade and may be subject to resale restrictions. Additionally, they are often issued in connection with highly leveraged transactions. Such transactions include leveraged buyout loans, leveraged recapitalization loans, and other types of acquisition financing. Leveraged buyout loans are subject to greater credit risks than other investments including a greater possibility that the borrower may default or enter bankruptcy. A significant portion of floating rate corporate investments may be “covenant lite” loans that may contain fewer or less restrictive constraints on the borrower or other borrower-friendly characteristics. Covenant lite loans may hinder the Fund’s ability to monitor the performance of the borrower and to protect the value of Fund’s investment in the event of the borrower’s financial difficulties.

Covenant Lite Loans and Debt Securities

In the event of a breach of a covenant in non-covenant lite loans or debt securities, lenders may have the ability to obtain concessions from the borrowers in exchange for a waiver or amendment of covenants. In contrast, covenant lite loans do not necessarily offer the same ability to obtain additional concessions from borrowers. This risk is offset to varying degrees by the fact that the same financial and performance information is available with or without covenants to lenders and the public alike and can be used to detect such early warning signs as deterioration of a borrower’s financial condition or results. With such information, the portfolio managers are normally able to take appropriate action without the help of covenants in the loan agreements or debt securities. Covenant lite corporate loans and debt securities, however, may foster a capital structure designed to avoid defaults by giving borrowers or issuers increased financial flexibility when they need it the most.

High-Yield Debt Securities

Issuers of lower-rated or “high-yield” debt securities (also called “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 and 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.

Liquidity

From time to time, the trading market for a particular security or type of security in which the Fund invests may become less liquid or even illiquid. Reduced liquidity will have an adverse impact on the Fund’s ability to sell such securities when necessary to meet the Fund’s liquidity needs or in response to a specific economic event and will also generally lower the value of a security. Market prices for such securities 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 owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. When there are more sellers than buyers, prices tend to fall. Likewise, when there are more buyers than sellers, prices tend to rise.

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.

Foreign Securities

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

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. In general, securities with longer maturities are more sensitive to these 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. If the changes in market rates are substantial, the interest rate on a variable rate security may not reset during a single adjustment period. Lifetime limits on resets may also prevent their rates from adjusting 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 or when the Fund experiences defaults on debt securities it holds.

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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You can obtain updated performance information at franklintempleton.com or by calling (800) DIAL BEN/342-5236.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading CLASS A ANNUAL TOTAL RETURNS
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter:Q2'0911.68%
Worst Quarter:Q4'08-18.90%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Floating Rate Daily Access Fund | Credit Suisse Leveraged Loan Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 6.15%
5 Years rr_AverageAnnualReturnYear05 13.51%
10 Years rr_AverageAnnualReturnYear10 5.06%
Franklin Floating Rate Daily Access Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 2.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.10% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.87%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.85% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 310
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 494
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 695
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,272
Annual Return 2004 rr_AnnualReturn2004 3.67%
Annual Return 2005 rr_AnnualReturn2005 4.20%
Annual Return 2006 rr_AnnualReturn2006 6.02%
Annual Return 2007 rr_AnnualReturn2007 1.78%
Annual Return 2008 rr_AnnualReturn2008 (22.83%)
Annual Return 2009 rr_AnnualReturn2009 29.56%
Annual Return 2010 rr_AnnualReturn2010 8.36%
Annual Return 2011 rr_AnnualReturn2011 0.87%
Annual Return 2012 rr_AnnualReturn2012 8.07%
Annual Return 2013 rr_AnnualReturn2013 4.53%
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%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 2.18%
5 Years rr_AverageAnnualReturnYear05 9.36%
10 Years rr_AverageAnnualReturnYear10 3.47%
Franklin Floating Rate Daily Access Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.62%
5 Years rr_AverageAnnualReturnYear05 7.77%
10 Years rr_AverageAnnualReturnYear10 1.82%
Franklin Floating Rate Daily Access Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.22%
5 Years rr_AverageAnnualReturnYear05 6.74%
10 Years rr_AverageAnnualReturnYear10 2.04%
Franklin Floating Rate Daily Access Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.65%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.10% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.27%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.25% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 227
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 401
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 695
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,533
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 127
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 401
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 695
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,533
1 Year rr_AverageAnnualReturnYear01 3.12%
5 Years rr_AverageAnnualReturnYear05 9.42%
10 Years rr_AverageAnnualReturnYear10 3.30%
Franklin Floating Rate Daily Access Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.03% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.55%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.53% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 54
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 174
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 305
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 688
Franklin Floating Rate Daily Access Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.10% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.62%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.60% [4],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 61
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 197
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 344
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 773
1 Year rr_AverageAnnualReturnYear01 4.80%
5 Years rr_AverageAnnualReturnYear05 10.13%
10 Years rr_AverageAnnualReturnYear10 3.96%
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 127 in the Fund's Prospectus and under “Buying and Selling Shares” on page 79 of the Fund’s Statement of Additional Information.
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 64.86% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 64.86%
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 waiver and/or expense reimbursement 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 investment grade debt securities and investments, including government and corporate debt securities, mortgage- and asset-backed securities, floating rate corporate loans and debt securities, and municipal securities, targeting an estimated average portfolio duration of three (3) years or less. Derivatives whose reference securities are investment grade are considered by the Fund to be investment grade.

Duration is a measure of the expected price volatility of a debt instrument as a result of changes in market rates of interest, based on the weighted average timing of the instrument’s expected principal and interest payments and other factors. 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 may also invest up to 20% of its total assets in non-investment grade debt securities, including up to 5% in securities rated lower than B by S&P or Moody’s, which may include defaulted securities. 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 also 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 goals, the Fund regularly enters into various derivative transactions, including currency and cross-currency forwards, currency, currency index, bond and interest rate futures contracts and options on interest rate futures contracts, and swap agreements, including interest rate, 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.

In choosing investments, the Fund’s investment manager selects securities in various market sectors based on the investment manager’s assessment of changing economic, market, industry and issuer conditions. The investment manager uses a “top-down” analysis of macroeconomic trends, combined with a “bottom-up” fundamental analysis of market sectors, industries and issuers, to try to take advantage of varying sector reactions to economic events.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests primarily in investment grade debt securities and investments, including government and corporate debt securities, mortgage- and asset-backed securities, floating rate corporate loans and debt securities, and municipal securities, targeting an estimated average portfolio duration of three (3) years or less. Derivatives whose reference securities are investment grade are considered by the Fund to be investment grade.
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. In general, securities with longer maturities are more sensitive to these interest rate changes.

Credit

An issuer of debt securities may fail to make interest payments and 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 called “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 and 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

The floating rate corporate loans and corporate debt securities in which the Fund invests generally have credit ratings below investment grade and may be subject to resale restrictions. Additionally, they are often issued in connection with highly leveraged transactions. Such transactions include leveraged buyout loans, leveraged recapitalization loans, and other types of acquisition financing. Leveraged buyout loans are subject to greater credit risks than other investments including a greater possibility that the borrower may default or enter bankruptcy. A significant portion of floating rate corporate investments may be “covenant lite” loans that may contain fewer or less restrictive constraints on the borrower or other borrower-friendly characteristics. Covenant lite loans may hinder the Fund’s ability to monitor the performance of the borrower and to protect the value of Fund’s investment in the event of the borrower’s financial difficulties.

Derivative Instruments

The performance of derivative instruments depends largely on the performance of an underlying instrument, such as a currency, security 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 used for hedging, the change in value of the derivative may also not correlate specifically with the currency, security or other risk being hedged. With over-the-counter derivatives, there is the risk that the other party to the transaction will fail to perform.

Income

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

Mortgage-Backed and Asset-Backed Securities

Mortgage-backed 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-backed 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-backed 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-backed securities, asset-backed securities are subject to prepayment and extension risks.

Foreign Securities

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

Currency Management Strategies

Currency management strategies may substantially change the Fund’s exposure to currency exchange rates and could result in losses to the Fund if currencies do not perform as the investment manager expects. In addition, currency management strategies, to the extent that they reduce the Fund’s exposure to currency risks, may also reduce the Fund’s ability to benefit from favorable changes in currency exchange rates. Using currency management strategies for purposes other than hedging further increases the Fund’s exposure to foreign investment losses. Currency markets generally are not as regulated as securities markets. In addition, currency rates may fluctuate significantly over short periods of time, and can reduce returns.

Extension Risk

Some debt securities, particularly mortgage-backed securities, are subject to the risk that the debt security’s effective maturity is extended because calls or prepayments are less or slower than anticipated, particularly when interest rates rise. The market value of such security may then decline and become more interest rate sensitive.

Prepayment

Prepayment risk occurs when a debt security can be repaid in whole or in part prior to the security's maturity and the Fund must reinvest the proceeds it receives, during periods of declining interest rates, in securities that pay a lower rate of interest.

Market

The market values of securities owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You can obtain updated performance information at franklintempleton.com or by calling (800) DIAL BEN/342-5236.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading CLASS A ANNUAL TOTAL RETURNS
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter:Q3'092.87%
Worst Quarter:Q3'11-1.94%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

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

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Low Duration Total Return Fund | Barclays U.S. Government/Credit Index: 1-3 Year Component
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.65%
5 Years rr_AverageAnnualReturnYear05 2.02%
Since Inception rr_AverageAnnualReturnSinceInception 3.06%
Franklin Low Duration Total Return Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 2.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.55% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.18% [2],[3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.98%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.80% [14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 305
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 513
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 737
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,383
Annual Return 2005 rr_AnnualReturn2005 1.26%
Annual Return 2006 rr_AnnualReturn2006 4.26%
Annual Return 2007 rr_AnnualReturn2007 5.86%
Annual Return 2008 rr_AnnualReturn2008 2.32%
Annual Return 2009 rr_AnnualReturn2009 8.24%
Annual Return 2010 rr_AnnualReturn2010 4.79%
Annual Return 2011 rr_AnnualReturn2011 0.60%
Annual Return 2012 rr_AnnualReturn2012 4.08%
Annual Return 2013 rr_AnnualReturn2013 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%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (1.10%)
5 Years rr_AverageAnnualReturnYear05 3.28%
Since Inception rr_AverageAnnualReturnSinceInception 3.29%
Franklin Low Duration Total Return Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.08%)
5 Years rr_AverageAnnualReturnYear05 2.23%
Since Inception rr_AverageAnnualReturnSinceInception 2.07%
Franklin Low Duration Total Return Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.62%)
5 Years rr_AverageAnnualReturnYear05 2.15%
Since Inception rr_AverageAnnualReturnSinceInception 2.09%
Franklin Low Duration Total Return Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.55% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.65%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.18% [2],[3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.38%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.20% [14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 222
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 419
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 738
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,642
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 122
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 419
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 738
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,642
1 Year rr_AverageAnnualReturnYear01 (0.21%)
5 Years rr_AverageAnnualReturnYear05 3.32%
Since Inception rr_AverageAnnualReturnSinceInception 3.09%
Franklin Low Duration Total Return Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.55% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.07% [2],[3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.62%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.44% [14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 45
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 180
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 328
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 757
Franklin Low Duration Total Return Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.55% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.18% [2],[3]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.73%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.55% [14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 56
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 215
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 388
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 890
1 Year rr_AverageAnnualReturnYear01 1.44%
5 Years rr_AverageAnnualReturnYear05 4.04%
Since Inception rr_AverageAnnualReturnSinceInception 3.72%
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 127 in the Fund's Prospectus and under “Buying and Selling Shares” on page 79 of the Fund’s Statement of Additional Information.
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 371.54% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 371.54%
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 waiver and/or expense reimbursement 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 at least 80% of its assets in investment grade debt securities and investments, including government and corporate debt securities, mortgage- and asset-backed securities, floating interest rate corporate loans and debt securities, and municipal securities. Derivatives whose reference securities are investment grade are considered by the Fund to be investment grade. The Fund currently focuses on government and corporate debt securities and mortgage- and asset-backed securities. 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 may also invest up to 20% of its total assets in non-investment grade debt securities, including up to 5% in securities rated lower than B by S&P or Moody’s, which may include defaulted securities. 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 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.

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.

To pursue its investment goals, the Fund regularly enters into various derivative transactions, including currency and cross-currency forwards, currency, currency index, bond and interest rate futures contracts and options on interest rate futures contracts, and swap agreements, including interest rate, 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.

In choosing investments, the Fund’s investment manager selects securities in various market sectors based on the investment manager’s assessment of changing economic, market, industry and issuer conditions. The investment manager uses a “top-down” analysis of macroeconomic trends, combined with a “bottom-up” fundamental analysis of market sectors, industries and issuers, to try to take advantage of varying sector reactions to economic events.
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. In general, securities with longer maturities are more sensitive to these interest rate changes.

Credit

An issuer of debt securities may fail to make interest payments and 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 called “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 and 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

The floating rate corporate loans and corporate debt securities in which the Fund invests generally have credit ratings below investment grade and may be subject to resale restrictions. Additionally, they are often issued in connection with highly leveraged transactions. Such transactions include leveraged buyout loans, leveraged recapitalization loans, and other types of acquisition financing. Leveraged buyout loans are subject to greater credit risks than other investments including a greater possibility that the borrower may default or enter bankruptcy. A significant portion of floating rate corporate investments may be “covenant lite” loans that may contain fewer or less restrictive constraints on the borrower or other borrower-friendly characteristics. Covenant lite loans may hinder the Fund’s ability to monitor the performance of the borrower and to protect the value of Fund’s investment in the event of the borrower’s financial difficulties.

Derivative Instruments

The performance of derivative instruments depends largely on the performance of an underlying instrument, such as a currency, security 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 used for hedging, the change in value of the derivative may also not correlate specifically with the currency, security or other risk being hedged. With over-the-counter derivatives, there is the risk that the other party to the transaction will fail to perform.

Income

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

Mortgage-Backed and Asset-Backed Securities

Mortgage-backed 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-backed 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-backed 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-backed securities, asset-backed securities are subject to prepayment and extension risks.

Foreign Securities

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

Currency Management Strategies

Currency management strategies may substantially change the Fund’s exposure to currency exchange rates and could result in losses to the Fund if currencies do not perform as the investment manager expects. In addition, currency management strategies, to the extent that they reduce the Fund’s exposure to currency risks, may also reduce the Fund’s ability to benefit from favorable changes in currency exchange rates. Using currency management strategies for purposes other than hedging further increases the Fund’s exposure to foreign investment losses. Currency markets generally are not as regulated as securities markets. In addition, currency rates may fluctuate significantly over short periods of time, and can reduce returns.

Extension Risk

Some debt securities, particularly mortgage-backed securities, are subject to the risk that the debt security’s effective maturity is extended because calls or prepayments are less or slower than anticipated, particularly when interest rates rise. The market value of such security may then decline and become more interest rate sensitive.

Prepayment

Prepayment risk occurs when a debt security can be repaid in whole or in part prior to the security's maturity and the Fund must reinvest the proceeds it receives, during periods of declining interest rates, in securities that pay a lower rate of interest.

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 purchase 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 turnover rate for the Fund.

Market

The market values of securities owned by the Fund will go up or down, sometimes rapidly or unpredictably. A security’s market value 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 securities. 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

Investing in investment funds may be more costly to the Fund than if the Fund had invested in the underlying securities directly. Shareholders of the Fund will indirectly bear the fees and expenses (including management and advisory fees and other expenses) of the underlying investment funds.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You can obtain updated performance information at franklintempleton.com or by calling (800) DIAL BEN/342-5236.

Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance from year to year for Class A shares. The table shows how the Fund's average annual returns for 1 year, 5 years, 10 years or since inception, as applicable, compared with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) DIAL BEN/342-5236
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress franklintempleton.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading CLASS A ANNUAL TOTAL RETURNS
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter:Q3'096.20%
Worst Quarter:Q3'08-4.05%
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS
(figures reflect sales charges)

For the periods ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Performance information for Class R6 shares is not shown because this class did not have a full calendar year of operations as of the date of this prospectus.

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Total Return Fund | Barclays U.S. Aggregate Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.02%)
5 Years rr_AverageAnnualReturnYear05 4.44%
10 Years rr_AverageAnnualReturnYear10 4.55%
Franklin Total Return Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 4.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.93%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [15]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.89% [15],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 512
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 705
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 914
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,516
Annual Return 2004 rr_AnnualReturn2004 5.27%
Annual Return 2005 rr_AnnualReturn2005 1.80%
Annual Return 2006 rr_AnnualReturn2006 4.86%
Annual Return 2007 rr_AnnualReturn2007 4.86%
Annual Return 2008 rr_AnnualReturn2008 (5.48%)
Annual Return 2009 rr_AnnualReturn2009 15.39%
Annual Return 2010 rr_AnnualReturn2010 10.13%
Annual Return 2011 rr_AnnualReturn2011 5.53%
Annual Return 2012 rr_AnnualReturn2012 8.33%
Annual Return 2013 rr_AnnualReturn2013 (0.98%)
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%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (5.20%)
5 Years rr_AverageAnnualReturnYear05 6.61%
10 Years rr_AverageAnnualReturnYear10 4.37%
Franklin Total Return Fund | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (6.74%)
5 Years rr_AverageAnnualReturnYear05 4.84%
10 Years rr_AverageAnnualReturnYear10 2.56%
Franklin Total Return Fund | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.94%)
5 Years rr_AverageAnnualReturnYear05 4.52%
10 Years rr_AverageAnnualReturnYear10 2.70%
Franklin Total Return Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.65%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.33%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [15]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.29% [15],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 231
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 418
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 725
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,599
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 131
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 418
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 725
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,599
1 Year rr_AverageAnnualReturnYear01 (2.31%)
5 Years rr_AverageAnnualReturnYear05 7.10%
10 Years rr_AverageAnnualReturnYear10 4.41%
Franklin Total Return Fund | Class R
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.18%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [15]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.14% [15],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 116
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 371
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 645
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,429
1 Year rr_AverageAnnualReturnYear01 (1.21%)
5 Years rr_AverageAnnualReturnYear05 7.27%
10 Years rr_AverageAnnualReturnYear10 4.56%
Franklin Total Return Fund | Class R6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none [6]
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [6]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.04% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.52%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [15]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.48% [15],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 49
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 163
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 287
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 649
Franklin Total Return Fund | Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.47% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20% [2],[3]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.68%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [15]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.64% [15],[5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 65
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 214
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 375
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 843
1 Year rr_AverageAnnualReturnYear01 (0.74%)
5 Years rr_AverageAnnualReturnYear05 7.81%
10 Years rr_AverageAnnualReturnYear10 5.09%
[1] There is a 1% contingent deferred sales charge that applies to investments of $1 million or more (see "Sales Charges-Class A" under "Choosing a Share Class") and purchases by certain retirement plans without an initial sales charge.
[2] Management fees and other expenses have been restated to reflect current fiscal year fees and expenses as a result of the bundling of the Fund's investment management agreement with its fund administration agreement effective May 1, 2013. Such combined investment management fees are described further under "Management" in the Fund's prospectus. Total annual fund operating expenses are not affected by such bundling.
[3] Other expenses for Class R6 represent an estimate of expenses, including the effect of this Class's lower shareholder servicing fees.
[4] Management has contractually agreed in advance to reduce its fee as a result of the Fund's investment in a Franklin Templeton money fund (acquired fund) for at least the next 12-month period. Contractual fee waiver and/or expense reimbursement agreements may not be terminated during the term set forth above.
[5] 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.
[6] The Fund began offering Class R6 shares on May 1, 2013.
[7] There is a 0.75% contingent deferred sales charge that applies to investments of $1 million or more (see "Sales Charges - Class A" under "Choosing a Share Class") and purchases by certain retirement plans without an initial sales charge.
[8] Management has contractually agreed to waive or assume certain expenses so that total annual Fund operating expenses (excluding the Rule 12b-1 fees, acquired fund fees and expenses and certain non-routine expenses) for each class of the Fund do not exceed (and could be less than) 0.65%, until February 28, 2015. Contractual fee waiver and/or expense reimbursement agreements may not be terminated during the terms set forth above.
[9] The Fund will begin offering Class A1 shares on June 18, 2014.
[10] Class A1 shares of the Adjustable U.S. Government Fund will launch on the date of the merger (estimated to be June 18, 2014). Shareholders of Limited Maturity Fund Class A will receive shares of Adjustable U.S. Government Class A1. The figures shown represent the estimated expenses for A1.
[11] Since inception July 1, 2003.
[12] The Fund began offering Class R6 shares on September 20, 2013.
[13] Since inception May 15, 2008.
[14] Management has contractually agreed to waive or assume certain expenses so that total annual Fund operating expenses (excluding the Rule 12b-1 fees, acquired fund fees and expenses and certain non-routine expenses) for each class of the Fund do not exceed (and could be less than) 0.55%, until February 28, 2015. Contractual fee waiver and/or expense reimbursement agreements may not be terminated during the terms set forth above.
[15] Management has contractually agreed to waive or assume certain expenses so that total annual Fund operating expenses (excluding the Rule 12b-1 fees, acquired fund fees and expenses and certain non-routine expenses) for each class of the Fund do not exceed (and could be less than) 0.63% until February 28, 2015. Management also has contractually agreed in advance to reduce its fees as a result of the Fund's investment in a Franklin Templeton money fund (acquired fund) for at least the next 12-month period. Contractual fee waiver and/or expense reimbursement agreements may not be terminated during the terms set forth above.