| Label | Element | Value | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Document Type | dei_DocumentType | 485BPOS | ||||||||||||||||||
| Document Period End Date | dei_DocumentPeriodEndDate | Dec. 31, 2024 | ||||||||||||||||||
| Entity Registrant Name | dei_EntityRegistrantName | Putnam Asset Allocation Funds | ||||||||||||||||||
| Entity Central Index Key | dei_EntityCentralIndexKey | 0000914209 | ||||||||||||||||||
| Entity Inv Company Type | dei_EntityInvCompanyType | N-1A | ||||||||||||||||||
| Amendment Flag | dei_AmendmentFlag | false | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Putnam Dynamic Asset Allocation Growth Fund | ||||||||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Goal | ||||||||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The fund seeks capital appreciation. |
||||||||||||||||||
| Expense [Heading] | rr_ExpenseHeading | Fees and expenses | ||||||||||||||||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | The following tables describe the fees and expenses you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. More information about these and other discounts is available from your financial professional and in How do I buy fund shares? beginning on page 39 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page 30 of the fund’s statement of additional information (“SAI”). |
||||||||||||||||||
| 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 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-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 133%. |
||||||||||||||||||
| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 133.00% | ||||||||||||||||||
| Expense Breakpoint Discounts [Text] | rr_ExpenseBreakpointDiscounts | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. | ||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | rr_ExpenseBreakpointMinimumInvestmentRequiredAmount | $ 50,000 | ||||||||||||||||||
| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | ||||||||||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower. |
||||||||||||||||||
| Strategy [Heading] | rr_StrategyHeading | Investments, risks, and performance | ||||||||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Investments The fund is one of three Putnam Dynamic Asset Allocation Funds, each of which has a unique strategic, or typical, allocation between equity and fixed-income investments. Using qualitative analysis and quantitative techniques, we adjust portfolio allocations from time to time within a certain range for each fund to try to optimize a fund’s performance consistent with its goal. The strategic allocation and the range of allowable allocation for the fund are shown below.
We invest mainly in equity securities (growth or value stocks or both) of both U.S. and foreign companies of any size. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments. We also invest, to a lesser extent, in fixed-income investments, including U.S. and foreign government obligations, corporate obligations and securitized debt instruments (such as mortgage-backed investments). We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments. We may also select other investments that do not fall within these asset classes. We typically use to a significant extent derivatives, such as futures, options, certain foreign currency transactions, warrants and interest rate and total return swap contracts, for both hedging and non-hedging purposes. |
||||||||||||||||||
| Risk [Heading] | rr_RiskHeading | Risks | ||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | It is important to understand that you can lose money by investing in the fund. Our allocation of assets among asset classes may hurt performance, and our efforts to diversify risk through the use of leverage and allocation decisions may not be successful. If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings, may negatively impact the fund’s performance, and may exacerbate other risks to which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The risks associated with bond investments include interest rate risk, which is the risk that the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund’s investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”), which can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative. Mortgage- and asset-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in other investments with less attractive terms and yields. The fund’s investments in mortgage- and asset-backed securities, and in certain other securities and derivatives, may be or become illiquid. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions, or high levels of inflation), and may be or become illiquid. Our use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund’s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues). Certain accounts or affiliates of the Investment Manager (as defined below), including other funds advised by the Investment Manager or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. There is no guarantee that the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected for the fund. We, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
||||||||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance | ||||||||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The accompanying 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 the average annual total returns of each class of the fund that has been in operation for at least one full calendar year and also compares the fund’s performance with the average annual total returns of a broad measure of market performance and the Putnam Growth Blended Benchmark, which is comprised of 60% Russell 3000® Index, 15% MSCI EAFE Index-NR, 15% Bloomberg U.S. Aggregate Bond Index, 5% JPMorgan Developed High Yield Index and 5% MSCI Emerging Markets Index-GD. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value per share, available at www.franklintempleton.com. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges are not reflected in the accompanying 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 accompanying bar chart and table provide some indication of the risks of investing in the fund. | ||||||||||||||||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.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 | Annual total returns for class A shares before sales charges | ||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown. | ||||||||||||||||||
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best calendar quarter | ||||||||||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Jun. 30, 2020 | ||||||||||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 17.16% | ||||||||||||||||||
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst calendar quarter | ||||||||||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | ||||||||||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (18.14%) | ||||||||||||||||||
| Performance Table Heading | rr_PerformanceTableHeading | Average annual total returns after sales charges For periods ended 12/31/24 | ||||||||||||||||||
| Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes | ||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | rr_PerformanceTableNotRelevantToTaxDeferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown | ||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | rr_PerformanceTableOneClassOfAfterTaxShown | After-tax returns are shown for class A shares only and will vary for other classes. | ||||||||||||||||||
| Performance Table Closing [Text Block] | rr_PerformanceTableClosingTextBlock | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect 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 shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class C share performance reflects conversion to class A shares after eight years. Important data provider notices and terms are available at www.franklintempletondatasources.com. All data is subject to change. |
||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Russell 3000 Index (no deduction for fees, expenses or taxes) | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 23.81% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 13.86% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 12.55% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Putnam Growth Blended Benchmark (no deduction for fees, expenses or taxes, other than withholding taxes on reinvested dividends in the case of the MSCI EAFE Index-NR) | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 15.64% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 9.43% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 9.12% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class A C000002319 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 5.75% | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | 1.00% | [1] | |||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.58% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.18% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.01% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 672 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 878 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 1,101 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,740 | ||||||||||||||||||
| Annual Return 2015 | rr_AnnualReturn2015 | (0.28%) | ||||||||||||||||||
| Annual Return 2016 | rr_AnnualReturn2016 | 7.84% | ||||||||||||||||||
| Annual Return 2017 | rr_AnnualReturn2017 | 19.85% | ||||||||||||||||||
| Annual Return 2018 | rr_AnnualReturn2018 | (9.71%) | ||||||||||||||||||
| Annual Return 2019 | rr_AnnualReturn2019 | 20.79% | ||||||||||||||||||
| Annual Return 2020 | rr_AnnualReturn2020 | 14.40% | ||||||||||||||||||
| Annual Return 2021 | rr_AnnualReturn2021 | 16.75% | ||||||||||||||||||
| Annual Return 2022 | rr_AnnualReturn2022 | (16.98%) | ||||||||||||||||||
| Annual Return 2023 | rr_AnnualReturn2023 | 20.76% | ||||||||||||||||||
| Annual Return 2024 | rr_AnnualReturn2024 | 19.05% | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 12.20% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.48% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.76% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class A C000002319 | After Taxes on Distributions | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 8.85% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 6.62% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 5.97% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class A C000002319 | After Taxes on Distributions and Sales | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 8.41% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 6.20% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 5.64% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class C C000002321 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | 1.00% | [2] | |||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.58% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 1.00% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.18% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.76% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 279 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 554 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 954 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | 1,875 | ||||||||||||||||||
| Expense Example, No Redemption, 1 Year | rr_ExpenseExampleNoRedemptionYear01 | 179 | ||||||||||||||||||
| Expense Example, No Redemption, 3 Years | rr_ExpenseExampleNoRedemptionYear03 | 554 | ||||||||||||||||||
| Expense Example, No Redemption, 5 Years | rr_ExpenseExampleNoRedemptionYear05 | 954 | ||||||||||||||||||
| Expense Example, No Redemption, 10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,875 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 17.17% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.96% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.75% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class P C000174663 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.58% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.06% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.64% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 65 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 205 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 357 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 798 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 19.50% | [3] | |||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 10.17% | [3] | |||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.79% | [3] | |||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class R C000002323 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.58% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.50% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.18% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.26% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 128 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 400 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 692 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,523 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 18.76% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 9.50% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.13% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class R5 C000117949 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.58% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.20% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.78% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 80 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 249 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 433 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 966 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 19.32% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 10.04% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.68% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class R6 C000117950 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.58% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.10% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.68% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 69 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 218 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 379 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 847 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 19.43% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 10.15% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.79% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Class Y C000002324 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.58% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.18% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.76% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 78 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 243 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 422 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 942 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 19.39% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 10.06% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.68% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Risk Lose Money [Member] | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | It is important to understand that you can lose money by investing in the fund. | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Growth Fund | Risk Not Insured Depository Institution [Member] | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Fund Summary Putnam Dynamic Asset Allocation Balanced Fund | ||||||||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Goal | ||||||||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The fund seeks total return. Total return is composed of capital appreciation and income. |
||||||||||||||||||
| Expense [Heading] | rr_ExpenseHeading | Fees and expenses | ||||||||||||||||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | The following tables describe the fees and expenses you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. More information about these and other discounts is available from your financial professional and in How do I buy fund shares? beginning on page 39 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page 30 of the fund’s statement of additional information (“SAI”). |
||||||||||||||||||
| 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 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-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 222%. |
||||||||||||||||||
| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 222.00% | ||||||||||||||||||
| Expense Breakpoint Discounts [Text] | rr_ExpenseBreakpointDiscounts | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. | ||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | rr_ExpenseBreakpointMinimumInvestmentRequiredAmount | $ 50,000 | ||||||||||||||||||
| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | ||||||||||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower. |
||||||||||||||||||
| Strategy [Heading] | rr_StrategyHeading | Investments, risks, and performance | ||||||||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Investments The fund is one of three Putnam Dynamic Asset Allocation Funds, each of which has a unique strategic, or typical, allocation between equity and fixed-income investments. Using qualitative analysis and quantitative techniques, we adjust portfolio allocations from time to time within a certain range for each fund to try to optimize a fund’s performance consistent with its goal. The strategic allocation and the range of allowable allocation for the fund are shown below.
We invest mainly in equity securities (growth or value stocks or both) of both U.S. and foreign companies of any size. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments. We also invest in fixed-income investments, including U.S. and foreign government obligations, corporate obligations and securitized debt instruments (such as mortgage-backed investments). We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments. We may also select other investments that do not fall within these asset classes. We typically use to a significant extent derivatives, such as futures, options, certain foreign currency transactions, warrants and interest rate and total return swap contracts, for both hedging and non-hedging purposes. |
||||||||||||||||||
| Risk [Heading] | rr_RiskHeading | Risks | ||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | It is important to understand that you can lose money by investing in the fund. Our allocation of assets among asset classes may hurt performance, and our efforts to diversify risk through the use of leverage and allocation decisions may not be successful. If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings, may negatively impact the fund’s performance, and may exacerbate other risks to which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The risks associated with bond investments include interest rate risk, which is the risk that the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund’s investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”), which can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative. Mortgage- and asset-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in other investments with less attractive terms and yields. The fund’s investments in mortgage- and asset-backed securities, and in certain other securities and derivatives, may be or become illiquid. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions, or high levels of inflation), and may be or become illiquid. Our use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund’s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues). Certain accounts or affiliates of the Investment Manager (as defined below), including other funds advised by the Investment Manager or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. There is no guarantee that the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected for the fund. We, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
||||||||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance | ||||||||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The accompanying 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 the average annual total returns of each class of the fund that has been in operation for at least one full calendar year and also compares the fund’s performance with the average annual total returns of a broad measure of market performance and the Putnam Balanced Blended Benchmark, which is comprised of 50% Russell 3000® Index, 35% Bloomberg U.S. Aggregate Bond Index, 10% MSCI EAFE Index-NR and 5% JPMorgan Developed High Yield Index. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value per share, available at www.franklintempleton.com. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges are not reflected in the accompanying 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 accompanying bar chart and table provide some indication of the risks of investing in the fund. | ||||||||||||||||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.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 | Annual total returns for class A shares before sales charges | ||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown | ||||||||||||||||||
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best calendar quarter | ||||||||||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Jun. 30, 2020 | ||||||||||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 13.38% | ||||||||||||||||||
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst calendar quarter | ||||||||||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | ||||||||||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (13.19%) | ||||||||||||||||||
| Performance Table Heading | rr_PerformanceTableHeading | Average annual total returns after sales charges For periods ended 12/31/24 | ||||||||||||||||||
| Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes | ||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | rr_PerformanceTableNotRelevantToTaxDeferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown | ||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | rr_PerformanceTableOneClassOfAfterTaxShown | After-tax returns are shown for class A shares only and will vary for other classes. | ||||||||||||||||||
| Performance Table Closing [Text Block] | rr_PerformanceTableClosingTextBlock | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect 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 shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class C share performance reflects conversion to class A shares after eight years. Important data provider notices and terms are available at www.franklintempletondatasources.com. All data is subject to change. |
||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Russell 3000 Index (no deduction for fees, expenses or taxes) | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 23.81% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 13.86% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 12.55% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Putnam Balanced Blended Benchmark (no deduction for fees, expenses or taxes, other than withholding taxes on reinvested dividends in the case of the MSCI EAFE Index-NR) | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 12.80% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 7.65% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.69% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class A C000002307 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 5.75% | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | 1.00% | [4] | |||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.93% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 664 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 854 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 1,060 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,652 | ||||||||||||||||||
| Annual Return 2015 | rr_AnnualReturn2015 | 0.30% | ||||||||||||||||||
| Annual Return 2016 | rr_AnnualReturn2016 | 6.69% | ||||||||||||||||||
| Annual Return 2017 | rr_AnnualReturn2017 | 15.18% | ||||||||||||||||||
| Annual Return 2018 | rr_AnnualReturn2018 | (7.21%) | ||||||||||||||||||
| Annual Return 2019 | rr_AnnualReturn2019 | 17.30% | ||||||||||||||||||
| Annual Return 2020 | rr_AnnualReturn2020 | 12.48% | ||||||||||||||||||
| Annual Return 2021 | rr_AnnualReturn2021 | 13.32% | ||||||||||||||||||
| Annual Return 2022 | rr_AnnualReturn2022 | (15.72%) | ||||||||||||||||||
| Annual Return 2023 | rr_AnnualReturn2023 | 17.56% | ||||||||||||||||||
| Annual Return 2024 | rr_AnnualReturn2024 | 16.03% | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 9.36% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 6.67% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 6.36% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class A C000002307 | After Taxes on Distributions | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 5.60% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 4.59% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 4.58% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class A C000002307 | After Taxes on Distributions and Sales | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 6.35% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 4.60% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 4.48% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class C C000002309 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | 1.00% | [5] | |||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 1.00% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.68% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 271 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 530 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 913 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | 1,788 | ||||||||||||||||||
| Expense Example, No Redemption, 1 Year | rr_ExpenseExampleNoRedemptionYear01 | 171 | ||||||||||||||||||
| Expense Example, No Redemption, 3 Years | rr_ExpenseExampleNoRedemptionYear03 | 530 | ||||||||||||||||||
| Expense Example, No Redemption, 5 Years | rr_ExpenseExampleNoRedemptionYear05 | 913 | ||||||||||||||||||
| Expense Example, No Redemption, 10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,788 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 14.14% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 7.13% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 6.36% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class P C000174661 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.06% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.57% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 58 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 183 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 318 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 714 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 16.45% | [6] | |||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.33% | [6] | |||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.38% | [6] | |||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class R C000002311 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.50% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.18% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 120 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 375 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 649 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,432 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 15.68% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 7.66% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 6.73% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class R5 C000117945 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.20% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.71% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 73 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 227 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 395 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 883 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 16.23% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.20% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.27% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class R6 C000117946 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.10% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.61% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 62 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 195 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 340 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 762 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 16.34% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.29% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.37% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Class Y C000002312 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.68% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 69 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 218 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 379 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 847 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 16.26% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.20% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.26% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Risk Lose Money [Member] | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | It is important to understand that you can lose money by investing in the fund. | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Balanced Fund | Risk Not Insured Depository Institution [Member] | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Fund Summary Putnam Dynamic Asset Allocation Conservative Fund | ||||||||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Goal | ||||||||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The fund seeks total return consistent with preservation of capital. Total return is composed of capital appreciation and income. |
||||||||||||||||||
| Expense [Heading] | rr_ExpenseHeading | Fees and expenses | ||||||||||||||||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | The following tables describe the fees and expenses you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. More information about these and other discounts is available from your financial professional and in How do I buy fund shares? beginning on page 39 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page 30 of the fund’s statement of additional information (“SAI”). |
||||||||||||||||||
| 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 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-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 372%. |
||||||||||||||||||
| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 372.00% | ||||||||||||||||||
| Expense Breakpoint Discounts [Text] | rr_ExpenseBreakpointDiscounts | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. | ||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | rr_ExpenseBreakpointMinimumInvestmentRequiredAmount | $ 50,000 | ||||||||||||||||||
| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | ||||||||||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower. |
||||||||||||||||||
| Strategy [Heading] | rr_StrategyHeading | Investments, risks, and performance | ||||||||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Investments The fund is one of three Putnam Dynamic Asset Allocation Funds, each of which has a unique strategic, or typical, allocation between equity and fixed-income investments. Using qualitative analysis and quantitative techniques, we adjust portfolio allocations from time to time within a certain range for each fund to try to optimize a fund’s performance consistent with its goal. The strategic allocation and the range of allowable allocation for the fund are shown below.
We invest mainly in fixed-income investments, including U.S. and foreign government obligations, corporate obligations and securitized debt instruments (such as mortgage-backed investments). We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments. We also invest, to a lesser extent, in equity securities (growth or value stocks or both) of U.S. and foreign companies of any size. We may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments. We may also select other investments that do not fall within these asset classes. We typically use to a significant extent derivatives, such as futures, options, certain foreign currency transactions, warrants and interest rate and total return swap contracts, for both hedging and non-hedging purposes. |
||||||||||||||||||
| Risk [Heading] | rr_RiskHeading | Risks | ||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | It is important to understand that you can lose money by investing in the fund. Our allocation of assets among asset classes may hurt performance, and our efforts to diversify risk through the use of leverage and allocation decisions may not be successful. If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings, may negatively impact the fund’s performance, and may exacerbate other risks to which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies. The risks associated with bond investments include interest rate risk, which is the risk that the value of the fund’s investments is likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund’s investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as “junk bonds”), which can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative. Mortgage- and asset-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in other investments with less attractive terms and yields. The fund’s investments in mortgage- and asset-backed securities, and in certain other securities and derivatives, may be or become illiquid. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions, or high levels of inflation), and may be or become illiquid. Our use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund’s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues). Certain accounts or affiliates of the Investment Manager (as defined below), including other funds advised by the Investment Manager or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. There is no guarantee that the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected for the fund. We, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
||||||||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance | ||||||||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The accompanying 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 the average annual total returns of each class of the fund that has been in operation for at least one full calendar year and also compares the fund’s performance with the average annual total returns of a broad measure of market performance and the Putnam Conservative Blended Benchmark, which is comprised of 65% Bloomberg U.S. Aggregate Bond Index, 25% Russell 3000® Index, 5% MSCI EAFE Index-NR and 5% JPMorgan Developed High Yield Index. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value per share, available at www.franklintempleton.com. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges are not reflected in the accompanying 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 accompanying bar chart and table provide some indication of the risks of investing in the fund. | ||||||||||||||||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.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 | Annual total returns for class A shares before sales charges | ||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown. | ||||||||||||||||||
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best calendar quarter | ||||||||||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Dec. 31, 2023 | ||||||||||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 8.48% | ||||||||||||||||||
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst calendar quarter | ||||||||||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Jun. 30, 2022 | ||||||||||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (8.97%) | ||||||||||||||||||
| Performance Table Heading | rr_PerformanceTableHeading | Average annual total returns after sales charges For periods ended 12/31/24 | ||||||||||||||||||
| Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. | ||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | rr_PerformanceTableNotRelevantToTaxDeferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. | ||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | rr_PerformanceTableOneClassOfAfterTaxShown | After-tax returns are shown for class A shares only and will vary for other classes. | ||||||||||||||||||
| Performance Table Closing [Text Block] | rr_PerformanceTableClosingTextBlock | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect 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 shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class C share performance reflects conversion to class A shares after eight years. Important data provider notices and terms are available at www.franklintempletondatasources.com. All data is subject to change. |
||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Bloomberg U.S. Aggregate Bond Index (no deduction for fees, expenses or taxes) | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.25% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | (0.33%) | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 1.35% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Putnam Conservative Blended Benchmark (no deduction for fees, expenses or taxes, other than withholding taxes on reinvested dividends in the case of the MSCI EAFE Index-NR) | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 7.10% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 3.83% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 4.68% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class A C000002313 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 5.75% | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | [7] | |||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.24% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.00% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 671 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 875 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 1,096 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,729 | ||||||||||||||||||
| Annual Return 2015 | rr_AnnualReturn2015 | 0.36% | ||||||||||||||||||
| Annual Return 2016 | rr_AnnualReturn2016 | 4.60% | ||||||||||||||||||
| Annual Return 2017 | rr_AnnualReturn2017 | 9.72% | ||||||||||||||||||
| Annual Return 2018 | rr_AnnualReturn2018 | (4.78%) | ||||||||||||||||||
| Annual Return 2019 | rr_AnnualReturn2019 | 11.81% | ||||||||||||||||||
| Annual Return 2020 | rr_AnnualReturn2020 | 10.04% | ||||||||||||||||||
| Annual Return 2021 | rr_AnnualReturn2021 | 5.65% | ||||||||||||||||||
| Annual Return 2022 | rr_AnnualReturn2022 | (14.65%) | ||||||||||||||||||
| Annual Return 2023 | rr_AnnualReturn2023 | 11.15% | ||||||||||||||||||
| Annual Return 2024 | rr_AnnualReturn2024 | 9.57% | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 3.27% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 2.64% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 3.40% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class A C000002313 | After Taxes on Distributions | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.45% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 1.24% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 2.11% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class A C000002313 | After Taxes on Distributions and Sales | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 2.09% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 1.58% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 2.22% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class C C000002315 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | [8] | |||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 1.00% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.24% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.75% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 278 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 551 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 949 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | 1,864 | ||||||||||||||||||
| Expense Example, No Redemption, 1 Year | rr_ExpenseExampleNoRedemptionYear01 | 178 | ||||||||||||||||||
| Expense Example, No Redemption, 3 Years | rr_ExpenseExampleNoRedemptionYear03 | 551 | ||||||||||||||||||
| Expense Example, No Redemption, 5 Years | rr_ExpenseExampleNoRedemptionYear05 | 949 | ||||||||||||||||||
| Expense Example, No Redemption, 10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,864 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 7.80% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 3.08% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 3.38% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class P C000174662 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.12% | ||||||||||||||||||
| 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 | 9.92% | [9] | |||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 4.25% | [9] | |||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 4.38% | [9] | |||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class R C000002317 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.50% | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.24% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.25% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 127 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 397 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 686 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,511 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 9.31% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 3.60% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 3.75% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class R5 C000117947 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.23% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.74% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 76 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 237 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 411 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 918 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 9.88% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 4.15% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 4.31% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class R6 C000117948 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| 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 | 0.67% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 68 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 214 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 373 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 835 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 9.99% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 4.21% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 4.37% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Class Y C000002318 | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.51% | ||||||||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.24% | ||||||||||||||||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.75% | ||||||||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 77 | ||||||||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 240 | ||||||||||||||||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 417 | ||||||||||||||||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 930 | ||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 9.88% | ||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 4.13% | ||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 4.26% | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Risk Lose Money [Member] | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | It is important to understand that you can lose money by investing in the fund. | ||||||||||||||||||
| Putnam Dynamic Asset Allocation Conservative Fund | Risk Not Insured Depository Institution [Member] | ||||||||||||||||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||
| ||||||||||||||||||||