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Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName FRANKLIN FUND ALLOCATOR SERIES
Prospectus Date rr_ProspectusDate May 01, 2016
Risk/Return [Heading] rr_RiskReturnHeading Fund Summary
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock To seek to make monthly distributions, while preserving the investors' capital 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 $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 187 in the Fund's Prospectus and under “Buying and Selling Shares” on page 92 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

A mutual fund generally 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 mutual fund shares are held in a taxable account. During the most recent fiscal year, the Fund's portfolio turnover rate was 38.48% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 38.48%
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 waivers and/or expense reimbursements by management as described above 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 employs an asset allocation strategy, combined with an income generation strategy, designed for investors in retirement.

Under normal market conditions, the investment manager allocates the Fund’s assets among the broad asset classes of equity, fixed-income and alternative (non-traditional) investments by investing primarily in a distinctly-weighted combination of underlying funds, predominantly other Franklin Templeton mutual funds, based on each underlying fund's predominant asset class and strategy. A portion of the Fund’s assets may be invested in affiliated and unaffiliated exchange traded funds (ETFs). These underlying funds and ETFs, in turn, invest in a variety of U.S. and foreign equity, fixed-income and alternative investments. The alternative (or “non-traditional”) investment strategies that the underlying funds employ may include, but are not limited to, long/short equity, long/short credit, relative value, event driven and global macro strategies.

Under normal market conditions, 30% of the Fund’s assets are allocated to equity investments, 65% of the Fund’s assets are allocated to fixed-income investments and 5% of the Fund’s assets are allocated to alternative (non-traditional) investments. The underlying funds and the percentage allocations to each asset class may be changed from time to time by the Fund’s investment manager without the approval of shareholders, and, under normal market conditions, the percentage allocations for equity and fixed-income funds may vary up to 10% from the stated allocations, and the allocations for the alternative investments funds may vary up to 5%.

In order to generate additional income for the Retirement Income Fund, the investment manager employs an income generation strategy. Under this strategy, the Retirement Income Fund regularly engages in: (1) a direct covered call strategy by writing covered call options on equity indices, equity ETFs and equity index futures; and (2) an indirect covered call strategy through the use of equity index-linked notes, which are notes that synthetically combine the return of the ownership of an equity index and a covered call on that index and produce coupon payments to the Retirement Income Fund. In addition, the Retirement Income Fund may engage in equity index futures and purchase exchange-traded and OTC put options on equity indices, equity ETFs and equity index futures for hedging purposes to tactically adjust the Retirement Income Fund’s exposure to certain asset classes and for efficient portfolio management purposes. The derivatives in which the Retirement Income Fund invests for its income generation strategy are allocated to the Retirement Income Fund’s equity asset class for purposes of the Retirement Income Fund’s asset allocations.

Under normal market conditions, the Fund employs a managed distribution policy that is designed to provide shareholders with regular distributions from their investment. Under this policy, the Fund distributes twelve level monthly payments throughout each calendar year to enable shareholders to estimate the distributions they will receive from the Fund; however, the twelfth monthly payment may be greater than the initially anticipated amount if additional income or capital gains are required to be distributed. The targeted annual payout rate for all share classes is between approximately 3% and 6% per share based on the last net asset value of the Fund of the prior calendar year in which the distribution is being made (e.g., for distributions made in 2016, the targeted annual payout rate for all share classes will be based on the Fund’s net asset value on December 31, 2015). The distribution rate will vary by class based on the expenses of each class.

Every year, the investment manager will undertake to determine if an adjustment should be made to the monthly rate. In determining if changes need to be made to the rate, the investment manager will evaluate such factors as the current and forecasted interest rate environment, dividend projections, fee structure of the Fund and its classes, historical long-term performance (e.g., performance over the past three years) of the Fund, and capital market expectations. The current or adjusted distribution rate would be applied in January of the following year. Therefore, the required amount of shares needed to be held by a shareholder to generate the same monthly payout under the managed distribution policy may vary from year to year depending on the determined distribution rate for that year. The annual payout rate may be adjusted higher or lower from year to year in response to market conditions, without shareholder approval.

Level monthly distributions will be paid to shareholders under the managed distribution policy in any given year regardless of the performance of the Fund. These payments may include income and capital gains generated by the underlying securities in the portfolio, as well as a possible return on capital component, if necessary, to meet the annual distribution rate.

When selecting equity funds, the investment manager considers the underlying funds’ foreign and domestic exposure, market capitalization ranges, and investment style (growth vs. value). When selecting fixed-income funds, the investment manager focuses primarily on maximizing income, appropriate to the Fund’s risk profile, and considers the credit quality, duration and maturity of the underlying funds’ portfolios. Certain fixed-income funds may hold securities across the credit quality spectrum, including below investment grade or "junk" bonds. In evaluating the risk level of the underlying funds, including alternative investments funds, the investment manager analyzes such factors as: (a) relative and absolute performance, including correlations with other underlying funds as well as corresponding benchmarks, and (b) their volatility (the variability of returns from one period to the next).

No more than 25% of the Fund’s assets may be invested in any one underlying fund, except that the Fund may invest up to 50% of its total assets in Franklin U.S. Government Securities Fund.

While the Fund is designed for investors in retirement, investors should also consider other factors besides their age or retirement date, such as their risk tolerance, personal circumstances, legal considerations, tax consequences and status, complete financial situation and needs and individual goals, some or all of which can change frequently. It is possible to lose money by investing in the Fund notwithstanding the managed distribution policy. There can be no assurance or guarantee that the Fund will provide a fixed stable level of distributions at any time or over any period of time. An investment in the Fund could lose money over short, intermediate, or even long periods of time.
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.

Asset Allocation

The Fund’s ability to achieve its investment goal depends upon the investment manager’s skill in determining the Fund’s broad asset allocation mix and selecting underlying funds. There is the possibility that the investment manager’s evaluations and assumptions regarding asset classes and underlying funds will not successfully achieve the Fund's investment goal in view of actual market trends.

Investing in Underlying Funds

Because the Fund invests in underlying funds, and the Fund’s performance is directly related to the performance of the underlying funds held by it, the ability of the Fund to achieve its investment goal is directly related to the ability of the underlying funds to meet their investment goals. In addition, shareholders of the Fund will indirectly bear the fees and expenses of the underlying funds. The risks described below are the principal risks of the Fund and the underlying funds.

Investing in ETFs

The Fund’s investment in ETFs may subject the Fund to additional risks than if the Fund would have invested directly in the ETFs’ underlying securities. These risks include the possibility that an ETF may experience a lack of liquidity that can result in greater volatility than its underlying securities; an ETF may trade at a premium or discount to its net asset value; or an ETF may not replicate exactly the performance of the benchmark index it seeks to track. In addition, investing in an ETF may also be more costly than if a Fund had owned the underlying securities directly. The Fund, and indirectly shareholders of the Fund, bears a proportionate share of the ETF’s expenses, which include management and advisory fees and other expenses. In addition, the Fund pays brokerage commissions in connection with the purchase and sale of shares of ETFs.

Managed Distribution Policy

The Fund’s monthly payments may reduce the amount of assets available for investment by the Fund. It is possible for the Fund to suffer substantial losses and experience additional asset reductions as a result of the monthly payments to shareholders under the managed distribution policy. Even if the Fund’s assets grow over time, it is possible that such growth will not be sufficient to maintain the rate of its monthly distributions. As a result, the Fund may return capital to shareholders (i.e., a return of all or part of a shareholder’s original investment). The Fund’s ability to achieve its objective of preserving capital while making monthly distributions is subject to market conditions at the time of investment and the length of time shares of the Fund are held. Fund shareholders are expected to receive a monthly distribution that is equal to a set percentage per share, which will be different per class based on differences in class expenses, multiplied by the number of shares owned on the record date. The managed distribution policy is not designed to generate, and is not expected to result in, distributions that equal a fixed percentage of the Fund’s current net asset value per share or a fixed percentage of a shareholder’s current account value. In addition, any redemptions you make from your Fund account may proportionately reduce the amount of future distributions you will receive from the Fund. For additional information on the Fund’s managed distribution policy, see the section in this prospectus entitled “Distributions and Taxes.”

For purposes of the discussion below, “Fund” means the Fund and/or one or more of the underlying funds in which the Fund invests.

Interest Rate

When interest rates rise, debt security prices generally fall. The opposite is also generally true: debt security prices rise when interest rates fall. Interest rate changes are influenced by a number of factors, including government policy, monetary policy, inflation expectations, perceptions of risk, and supply and demand of bonds. In general, securities with longer maturities or durations 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. 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. Accordingly, securities issued by Fannie Mae and Freddie Mac may involve a risk of non-payment of principal and interest.

Market

The market values of securities or other investments owned by the Fund will go up or down, sometimes rapidly or unpredictably. The market value of a security or other investment may be reduced by market activity or other results of supply and demand unrelated to the issuer. This is a basic risk associated with all investments. When there are more sellers than buyers, prices tend to fall. Likewise, when there are more buyers than sellers, prices tend to rise.

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

Foreign Securities

Investing in foreign securities typically involves more risks than investing in U.S. securities, and includes risks associated with: internal and external political and economic developments – e.g., the political, economic and social policies and structures of some foreign countries may be less stable and more volatile than those in the U.S. or some foreign countries may be subject to trading restrictions or economic sanctions; trading practices – e.g., government supervision and regulation of foreign securities and currency markets, trading systems and brokers may be less than in the U.S.; availability of information – e.g., foreign issuers may not be subject to the same disclosure, accounting and financial reporting standards and practices as U.S. issuers; limited markets – e.g., the securities of certain foreign issuers may be less liquid (harder to sell) and more volatile; and currency exchange rate fluctuations and policies.

Equity-Linked Notes (ELNs)

Investments in ELNs often have risks similar to their underlying securities, which could include management risk, market risk and, as applicable, foreign securities and currency risks. In addition, since ELNs are in note form, ELNs are also subject to certain debt securities risks, such as interest rate and credit risks. Should the prices of the underlying securities move in an unexpected manner, the Fund may not achieve the anticipated benefits of an investment in an ELN, and may realize losses, which could be significant and could include the Fund’s entire principal investment. An investment in an ELN is also subject to counterparty risk, which is the risk that the issuer of the ELN will default or become bankrupt and the Fund will have difficulty being repaid, or fail to be repaid, the principal amount of, or income from, its investment. Investments in ELNs are also subject to liquidity risk, which may make ELNs difficult to sell and value. In addition, ELNs may exhibit price behavior that does not correlate with the underlying securities or a fixed-income investment.

Derivative Instruments

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

Growth Style Investing

Growth stock prices reflect projections of future earnings or revenues, and can, therefore, fall dramatically if the company fails to meet those projections. Prices of these companies’ securities may be more volatile than other securities, particularly over the short term.

Value Style Investing

A value stock may not increase in price as anticipated by the investment manager if other investors fail to recognize the company's value and bid up the price, the markets favor faster-growing companies, or the factors that the investment manager believes will increase the price of the security do not occur.

Smaller and Midsize Companies

Securities issued by smaller and midsize companies may be more volatile in price than those of larger companies, involve substantial risks and should be considered speculative. Such risks may include greater sensitivity to economic conditions, less certain growth prospects, lack of depth of management and funds for growth and development, and limited or less developed product lines and markets. In addition, smaller and midsize companies may be particularly affected by interest rate increases, as they may find it more difficult to borrow money to continue or expand operations, or may have difficulty in repaying any loans.

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.

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. Also, if a security has been purchased at a premium, the value of the premium would be lost in the event of prepayment. Prepayments generally increase when interest rates fall.

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 indices in the table below show how the Fund's performance compares to groups of securities that align with a portion 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:Q2'0912.99%
Worst Quarter:Q4'08-13.01%
As of March 31, 2016, the Fund's year-to-date return was -0.48%.
Performance Table Heading rr_PerformanceTableHeading

Average Annual Total Returns
(figures reflect sales charges)

For the periods ended December 31, 2015
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

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

The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and after-tax returns for other classes will vary.
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management fees rr_ManagementFeesOverAssets 0.25%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25% [2]
Other expenses rr_OtherExpensesOverAssets 0.39%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.68% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.57% [3]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.59%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.98% [3]
1 year rr_ExpenseExampleYear01 $ 670
3 years rr_ExpenseExampleYear03 989
5 years rr_ExpenseExampleYear05 1,330
10 years rr_ExpenseExampleYear10 $ 2,291
2007 rr_AnnualReturn2007 9.84%
2008 rr_AnnualReturn2008 (25.55%)
2009 rr_AnnualReturn2009 28.50%
2010 rr_AnnualReturn2010 12.77%
2011 rr_AnnualReturn2011 (0.82%)
2012 rr_AnnualReturn2012 9.20%
2013 rr_AnnualReturn2013 12.27%
2014 rr_AnnualReturn2014 3.07%
2015 rr_AnnualReturn2015 (2.59%)
Year to Date Return, Label rr_YearToDateReturnLabel As of March 31, 2016, the Fund's year-to-date return was -0.48%.
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 12.99%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (13.01%)
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management fees rr_ManagementFeesOverAssets 0.25%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.39%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.68% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 2.32% [3]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.59%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.73% [3]
1 year rr_ExpenseExampleYear01 $ 276
3 years rr_ExpenseExampleYear03 669
5 years rr_ExpenseExampleYear05 1,188
10 years rr_ExpenseExampleYear10 2,613
1 Year rr_ExpenseExampleNoRedemptionYear01 176
3 Years rr_ExpenseExampleNoRedemptionYear03 669
5 Years rr_ExpenseExampleNoRedemptionYear05 1,188
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,613
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Class R  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.25%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.39%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.68% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.82% [3]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.59%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.23% [3]
1 year rr_ExpenseExampleYear01 $ 126
3 years rr_ExpenseExampleYear03 516
5 years rr_ExpenseExampleYear05 932
10 years rr_ExpenseExampleYear10 $ 2,091
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Class R6  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.25%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.28%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.68% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.21% [3]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.68% [3]
1 year rr_ExpenseExampleYear01 $ 69
3 years rr_ExpenseExampleYear03 332
5 years rr_ExpenseExampleYear05 614
10 years rr_ExpenseExampleYear10 $ 1,419
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as percentage of the lower of original purchase price or sale proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.25%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.39%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.68% [3]
Total annual Fund operating expenses rr_ExpensesOverAssets 1.32% [3]
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.59%) [4]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.73% [3]
1 year rr_ExpenseExampleYear01 $ 75
3 years rr_ExpenseExampleYear03 361
5 years rr_ExpenseExampleYear05 668
10 years rr_ExpenseExampleYear10 $ 1,541
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Return Before Taxes | Class A  
Risk/Return: rr_RiskReturnAbstract  
Column rr_AverageAnnualReturnColumnName Franklin LifeSmart™ Retirement Income Fund
Label rr_AverageAnnualReturnLabel Return Before Taxes
Past 1 year rr_AverageAnnualReturnYear01 (8.18%)
Past 5 years rr_AverageAnnualReturnYear05 2.84%
Since Inception rr_AverageAnnualReturnSinceInception 4.25% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Return Before Taxes | Class C  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 (4.24%)
Past 5 years rr_AverageAnnualReturnYear05 3.34%
Since Inception rr_AverageAnnualReturnSinceInception 4.18% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Return Before Taxes | Class R  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 (2.87%)
Past 5 years rr_AverageAnnualReturnYear05 3.84%
Since Inception rr_AverageAnnualReturnSinceInception 4.69% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Return Before Taxes | Class R6  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 (2.34%)
Past 5 years rr_AverageAnnualReturnYear05
Since Inception rr_AverageAnnualReturnSinceInception 3.26% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Return Before Taxes | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 (2.40%)
Past 5 years rr_AverageAnnualReturnYear05 4.36%
Since Inception rr_AverageAnnualReturnSinceInception 5.22% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | After Taxes on Distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
Column rr_AverageAnnualReturnColumnName Franklin LifeSmart™ Retirement Income Fund
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Past 1 year rr_AverageAnnualReturnYear01 (9.64%)
Past 5 years rr_AverageAnnualReturnYear05 1.34%
Since Inception rr_AverageAnnualReturnSinceInception 3.10% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | After Taxes on Distributions and Sales | Class A  
Risk/Return: rr_RiskReturnAbstract  
Column rr_AverageAnnualReturnColumnName Franklin LifeSmart™ Retirement Income Fund
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
Past 1 year rr_AverageAnnualReturnYear01 (3.97%)
Past 5 years rr_AverageAnnualReturnYear05 1.84%
Since Inception rr_AverageAnnualReturnSinceInception 3.09% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | MSCI All Country World Index (index reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 (1.84%)
Past 5 years rr_AverageAnnualReturnYear05 6.66%
Since Inception rr_AverageAnnualReturnSinceInception 4.95% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Barclays Multiverse Index (index reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 (3.29%)
Past 5 years rr_AverageAnnualReturnYear05 1.01%
Since Inception rr_AverageAnnualReturnSinceInception 3.73% [5]
Franklin Templeton Fund Allocator Series RTF-13 | Franklin LifeSmart™ Retirement Income Fund | Payden & Rygel 90 Day U.S T-Bill Index (index reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 year rr_AverageAnnualReturnYear01 0.08%
Past 5 years rr_AverageAnnualReturnYear05 0.07%
Since Inception rr_AverageAnnualReturnSinceInception 1.04% [5]
[1] There is a 1% contingent deferred sales charge that applies to investments of $1 million or more (see "Investments of $1 Million or More" under "Choosing a Share Class") and purchases by certain retirement plans without an initial sales charge.
[2] Class A distribution and service (12b-1) fees have been restated to reflect the maximum annual rate set by the board of trustees. Consequently, the total annual Fund operating expenses differ from the ratio of expenses to average net assets shown in the Financial Highlights due to a different 12b-1 fee rate paid in the Fund’s most recent fiscal year.
[3] Total annual Fund operating expenses differ from the ratio of expenses to average net assets shown in the Financial Highlights, which reflect operating expenses of the Fund and do not include acquired fund fees and expenses.
[4] The investment manager has contractually agreed to waive or assume certain expenses so that total annual fund operating expenses (excluding Rule 12b-1 fees, acquired fund fees and expenses, and certain non-routine expenses) for each class of the Fund do not exceed (and could be less than) 0.05%, until April 30, 2017. The transfer agent has contractually agreed to cap transfer agency fees for Class R6 shares of the Fund so that transfer agency fees for that class do not exceed 0.01%, until at least April 30, 2017. 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 changed or terminated during the time period set forth above.
[5] Since inception for all Classes except Class R6, August 1, 2006; since inception Class R6, May 1, 2013.