485BPOS

As filed with the Securities and Exchange Commission on October 19, 2012

Registration No. 333-515

811-07513

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	¨
Post-Effective Amendment No. 151	x

and

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 152 (Check appropriate box or boxes)	x

PUTNAM FUNDS TRUST

(Exact Name of Registrant as Specified in Charter)

One Post Office Square,

Boston, Massachusetts 02109

(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, including Area Code

(617) 292-1000

It is proposed that this filing will become effective (check appropriate box)

¨ immediately upon filing pursuant to paragraph (b)

x on September 30, 2012 pursuant to paragraph (b)

¨ 60 days after filing pursuant to paragraph (a)(1)

¨ on (date) pursuant to paragraph (a)(1)

¨ 75 days after filing pursuant to paragraph (a)(2)

¨ on (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

¨ this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

ROBERT T. BURNS, Vice President

PUTNAM FUNDS TRUST

One Post Office Square

Boston, Massachusetts 02109

(Name and address of agent for service)

Copy to:

JOHN W. GERSTMAYR, Esquire

ROPES & GRAY LLP

Prudential Tower

800 Boylston Street

Boston, MA 02199-3600

This Post-Effective Amendment relates solely to the Registrant’s Putnam Dynamic Asset Allocation Equity Fund and Putnam Dynamic Risk Allocation Fund series. Information contained in the Registrant’s Registration Statement relating to any other series of the Registrant is neither amended nor superseded hereby.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Boston, and The Commonwealth of Massachusetts, on the 19th day of October, 2012.

Putnam Funds Trust

By: /s/ Jonathan S. Horwitz, Executive Vice President,

Principal Executive Officer and Compliance Liaison

Pursuant to the requirements of the Securities Act of 1933, this Amendment to the Registration Statement of Putnam Funds Trust has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title
Jameson A. Baxter *	Chair, Board of Trustees
Robert L. Reynolds*	President and Trustee
Jonathan S. Horwitz*	Executive Vice President, Principal Executive Officer and Compliance Liaison
Steven D. Krichmar*	Vice President and Principal Financial Officer
Janet C. Smith*	Vice President, Assistant Treasurer and Principal Accounting Officer
Liaquat Ahamed*	Trustee
Ravi Akhoury*	Trustee
Barbara M. Baumann*	Trustee
Charles B. Curtis*	Trustee
Robert J. Darretta*	Trustee
Katinka Domotorffy*	Trustee
John A. Hill*	Trustee

C-1

Paul L. Joskow*	Trustee
Elizabeth T. Kennan*	Trustee
Kenneth R. Leibler*	Trustee
Robert E. Patterson*	Trustee
George Putnam, III*	Trustee
W. Thomas Stephens*	Trustee

By: /s/ Jonathan S. Horwitz, as Attorney-in-Fact

October 19, 2012

*Signed pursuant to power of attorney filed herewith.

C-2

EXHIBIT INDEX

XBRL Instance Document	Ex-101.ins
XBRL Taxonomy Extension Schema Document	Ex-101.sch
XBRL Taxonomy Extension Calculation Linkbase Document	Ex-101.cal
XBRL Taxonomy Extension Labels Linkbase	Ex-101.lab
XBRL Taxonomy Extension Presentation Linkbase Document	Ex-101.pre
XBRL Taxonomy Extension Definition Linkbase	Ex-101.def

C-3

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Putnam Dynamic Risk Allocation Fund

Fund summary

Goal

Putnam Dynamic Risk Allocation Fund seeks total return. Total return is composed of capital appreciation and income.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. 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 advisor and in How do I buy fund shares? beginning on page 20 of the fund's prospectus and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Shareholder Fees Putnam Dynamic Risk Allocation Fund	Class A		Class B		Class C		Class M		Class R	Class R5	Class R6	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	5.75%		none		none		3.50%		none	none	none	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	1.00%	[1]	5.00%	[2]	1.00%	[3]	0.65%	[1]	none	none	none	none

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Putnam Dynamic Risk Allocation Fund		Class A	Class B	Class C	Class M	Class R	Class R5		Class R6		Class Y
Management fees		0.91%	0.91%	0.91%	0.91%	0.91%	0.91%		0.91%		0.91%
Distribution and service (12b-1) fees		0.25%	1.00%	1.00%	0.75%	0.50%
Other expenses		0.69%	0.69%	0.69%	0.69%	0.69%	0.66%	[1]	0.56%	[1]	0.69%
Acquired fund fees and expenses		0.01%	0.01%	0.01%	0.01%	0.01%	0.01%		0.01%		0.01%
Total annual fund operating expenses		1.86%	2.61%	2.61%	2.36%	2.11%	1.58%		1.48%		1.61%
Expense reimbursement	[2]	(0.45%)	(0.45%)	(0.45%)	(0.45%)	(0.45%)	(0.42%)		(0.32%)		(0.45%)
Total annual fund operating expenses after expense reimbursement		1.41%	2.16%	2.16%	1.91%	1.66%	1.16%		1.16%		1.16%

Example

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. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.

Expense Example Putnam Dynamic Risk Allocation Fund (USD $)	Class A	Class B	Class C	Class M	Class R	Class R5	Class R6	Class Y
1 year	710	719	319	537	169	118	118	118
3 years	1,085	1,069	769	1,019	618	458	437	464
5 years	1,484	1,545	1,345	1,527	1,093	821	778	834
10 years	2,595	2,728	2,911	2,919	2,406	1,843	1,741	1,873

Expense Example, No Redemption Putnam Dynamic Risk Allocation Fund (USD $)	Class B	Class C
1 year	219	219
3 years	769	769
5 years	1,345	1,345
10 years	2,728	2,911

Portfolio turnover

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 for the period September 19, 2011 through May 31, 2012 was 41%.

Investments

The fund invests in a diversified set of asset classes. By investing in a broader set of asset classes than a traditional balanced fund, and by using leverage to increase the fund's exposures to asset classes, we believe that the fund may achieve a higher total return than a traditional balanced fund with approximately the same amount of risk as a traditional balanced fund. Risk is measured by the volatility of the fund's investment portfolio.

The fund may invest without limit in U.S., international, and emerging markets equity securities (growth or value stocks or both) of companies of any size and fixed-income securities (including in high yield securities, which are sometimes referred to as "junk bonds"); mortgage- and asset-backed securities; inflation-protected securities; commodities; and real estate investment trusts. These asset classes offer different return potential and exposure to different investment risks.

We allocate the fund's assets among asset classes in a manner intended to diversify the fund's exposure to these different types of risk. We typically use leverage to adjust or to increase the fund's exposure to certain asset classes in order to diversify, or balance, risk exposure. We expect that, on average, net notional investment exposure of approximately 150% of the net assets of the fund will result from the fund's allocation strategy under normal market conditions, although the amounts of leverage may be significantly higher or lower at any given time. We believe that better risk diversification creates the potential for the fund to perform well in a variety of market environments. Because the potential risks and returns of asset classes, the costs of leverage, and the benefits of diversification vary over time and with market conditions, we make dynamic adjustments to the fund's asset allocations as the market environment changes. We use qualitative analysis, which includes evaluation of the business cycle environment and its impact on different asset classes, and quantitative techniques, which incorporate individual valuation and relative valuation measures, to establish asset class allocations that we believe will enable the fund to perform well in a variety of environments. We also use active trading strategies, such as active security selection, tactical asset allocation, currency transactions and options transactions. Certain of these strategies may introduce additional investment leverage.

When making particular investments within an asset class, 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, and, among other factors, credit, interest rate and prepayment risks when deciding whether to buy or sell fixed income investments. We may also take into account general market conditions when making investment decisions. We typically use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts to a significant extent, for hedging purposes, to obtain leverage, and to adjust the return and volatility characteristics of the fund's investments. We may also engage in short sales of securities.

Risks

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. The prices of stocks and bonds may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific issuer or industry. These risks are generally greater for small and midsize companies. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. Bond investments are subject to interest rate risk, which means the prices of the fund's bond investments are likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which may be considered speculative. Mortgage-backed investments carry the risk that they may increase in value less when interest rates decline and decline in value more 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 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 currency or other restrictions, or high levels of inflation or deflation), and may be illiquid. Our active trading strategies may lose money or not earn a return sufficient to cover trading and other costs. REITs are subject to the risk of economic downturns that have an adverse impact on real estate markets. Commodity-linked notes are subject to the same risks as commodities, such as weather, disease, political, tax and other regulatory developments and other factors affecting the value of commodities. Our use of leverage obtained through derivatives increases these risks by increasing investment exposure. Derivatives also involve the risk, in the case of over-the-counter instruments, of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value.

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.

Performance

Performance information will be available after the fund completes a full calendar year of operation.

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] This charge is phased out over six years.

[3] This charge is eliminated after one year.

[1] Other expenses are based on expenses of class A shares for the fund's last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.

[2] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through at least September 30, 2013. This obligation may be modified or discontinued only with the approval of the Board of Trustees.

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	PUTNAM FUNDS TRUST
Prospectus Date	rr_ProspectusDate	Sep. 30, 2012
Putnam Dynamic Asset Allocation Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Fund summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Dynamic Asset Allocation Equity Fund seeks long-term growth.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. 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 advisor and in How do I buy fund shares? beginning on page 13 of the fund's prospectus and in How to buy shares beginning on page II-1 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)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	September 30, 2013
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 82%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	82.00%
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. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 13 of the fund's prospectus and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).
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. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Strategy [Heading]	rr_StrategyHeading	Investments
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide. While we typically allocate approximately 75% of the fund's assets to investments in U.S. companies, and 25% of the fund's assets to investments in international companies, these allocations may vary. We invest mainly in developed countries, but may invest in emerging markets. 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 investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
Risk [Heading]	rr_RiskHeading	Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	It is important to understand that you can lose money by investing in the fund. The prices of stocks in the fund's portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. 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 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 currency or other restrictions, or high levels of inflation or deflation), and may be illiquid. Our use of derivatives may increase these risks by increasing investment exposure or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. 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. Investor profile The fund serves as an underlying equity investment of other funds that allocate their portfolios among the Putnam funds to obtain varying exposures to equity and fixed-income investments. The fund also is designed for investors seeking long-term growth and who are willing to wait out short-term market fluctuations.
Risk Lose Money [Text]	rr_RiskLoseMoney	It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	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 performance information below gives some indication of the risks associated with an investment in the fund by showing the fund's performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund's performance year to year and over time.
Performance Additional Market Index [Text]	rr_PerformanceAdditionalMarketIndex	The Putnam Equity Blended Index is an unmanaged index administered by Putnam Management, 75% of which is the Russell 3000 Index, 19% of which is the MSCI EAFE Index (ND), and 6% of which is the MSCI Emerging Markets Index (GD).
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Please remember that past performance is not necessarily an indication of future results.
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	The bar chart does not reflect the impact of sales charges. If it did, performance would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Year- to-date performance                    7.91% through 6/30/12 Best calendar quarter                           12.98% Q3 2010 Worst calendar quarter                           -18.48% Q3 2011
Year to Date Return, Label	rr_YearToDateReturnLabel	Year- to-date performance through
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	7.91%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2010
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	12.98%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(18.48%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ending 12/31/11)
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 Narrative	rr_PerformanceTableNarrativeTextBlock	The Putnam Equity Blended Index is an unmanaged index administered by Putnam Management, 75% of which is the Russell 3000 Index, 19% of which is the MSCI EAFE Index (ND), and 6% of which is the MSCI Emerging Markets Index (GD). 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.
Putnam Dynamic Asset Allocation Equity Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Redemption fee (as a percentage of total redemption proceeds)	rr_RedemptionFeeOverRedemption	1.00%
Management fees	rr_ManagementFeesOverAssets	0.60%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%	[2]
Other expenses	rr_OtherExpensesOverAssets	1.22%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.08%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.75%)	[3]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.33%
1 year	rr_ExpenseExampleYear01	703
3 years	rr_ExpenseExampleYear03	1,121
5 years	rr_ExpenseExampleYear05	1,564
10 years	rr_ExpenseExampleYear10	2,791
2010	rr_AnnualReturn2010	15.03%
2011	rr_AnnualReturn2011	(4.49%)
1 year	rr_AverageAnnualReturnYear01	(9.98%)
Since inception	rr_AverageAnnualReturnSinceInception	14.58%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 23, 2009
Putnam Dynamic Asset Allocation Equity Fund | Class Y
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Redemption fee (as a percentage of total redemption proceeds)	rr_RedemptionFeeOverRedemption	1.00%
Management fees	rr_ManagementFeesOverAssets	0.60%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets
Other expenses	rr_OtherExpensesOverAssets	1.22%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.83%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.75%)	[3]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.08%
1 year	rr_ExpenseExampleYear01	110
3 years	rr_ExpenseExampleYear03	503
5 years	rr_ExpenseExampleYear05	920
10 years	rr_ExpenseExampleYear10	2,086
1 year	rr_AverageAnnualReturnYear01	(4.58%)
Since inception	rr_AverageAnnualReturnSinceInception	16.91%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 23, 2009
Putnam Dynamic Asset Allocation Equity Fund | after taxes on distributions | Class A
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	(11.92%)
Since inception	rr_AverageAnnualReturnSinceInception	9.98%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 23, 2009
Putnam Dynamic Asset Allocation Equity Fund | after taxes on distributions and sale of fund shares | Class A
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	(5.01%)
Since inception	rr_AverageAnnualReturnSinceInception	10.52%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 23, 2009
Putnam Dynamic Asset Allocation Equity Fund | Russell 3000 Index (no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	1.03%
Since inception	rr_AverageAnnualReturnSinceInception	18.65%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 23, 2009
Putnam Dynamic Asset Allocation Equity Fund | Putnam Equity Blended Index (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends in the case of MSCI ND Index)
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	(2.76%)
Since inception	rr_AverageAnnualReturnSinceInception	17.92%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 23, 2009

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] No payments under the fund's distribution and service (12b-1) plan have been authorized by the Trustees. Should the Trustees decide in the future to approve payments under the plan, this prospectus will be revised.

[3] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through September 30, 2013. This obligation may be modified or discontinued only with approval of the Board of Trustees.

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Putnam Dynamic Asset Allocation Equity Fund

Fund summary

Goal

Putnam Dynamic Asset Allocation Equity Fund seeks long-term growth.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. 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 advisor and in How do I buy fund shares? beginning on page 13 of the fund's prospectus and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Shareholder Fees Putnam Dynamic Asset Allocation Equity Fund	Class A		Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	5.75%		none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	1.00%	[1]	none
Redemption fee (as a percentage of total redemption proceeds)	1.00%		1.00%

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Putnam Dynamic Asset Allocation Equity Fund		Class A		Class Y
Management fees		0.60%		0.60%
Distribution and service (12b-1) fees		0.25%	[1]
Other expenses		1.22%		1.22%
Acquired fund fees and expenses		0.01%		0.01%
Total annual fund operating expenses		2.08%		1.83%
Expense reimbursement	[2]	(0.75%)		(0.75%)
Total annual fund operating expenses after expense reimbursement		1.33%		1.08%

Example

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. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.

Expense Example Putnam Dynamic Asset Allocation Equity Fund (USD $)	Class A	Class Y
1 year	703	110
3 years	1,121	503
5 years	1,564	920
10 years	2,791	2,086

Portfolio turnover

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 82%.

Investments

We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide. While we typically allocate approximately 75% of the fund's assets to investments in U.S. companies, and 25% of the fund's assets to investments in international companies, these allocations may vary. We invest mainly in developed countries, but may invest in emerging markets. 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 investments. We may also use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.

Risks

It is important to understand that you can lose money by investing in the fund.

The prices of stocks in the fund's portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. 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 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 currency or other restrictions, or high levels of inflation or deflation), and may be illiquid. Our use of derivatives may increase these risks by increasing investment exposure or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. 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.

Investor profile The fund serves as an underlying equity investment of other funds that allocate their portfolios among the Putnam funds to obtain varying exposures to equity and fixed-income investments. The fund also is designed for investors seeking long-term growth and who are willing to wait out short-term market fluctuations.

Performance

The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund's performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results.

Annual total returns for class A shares before sales charges

Year- to-date
performance                    7.91%
through 6/30/12

Best calendar
quarter                           12.98%
Q3 2010

Worst calendar
quarter                           -18.48%
Q3 2011

Average annual total returns after sales charges
(for periods ending 12/31/11)

Average Annual Total Returns Putnam Dynamic Asset Allocation Equity Fund	1 year	Since inception	Inception Date
Class A	(9.98%)	14.58%	Jan. 23, 2009
Class A after taxes on distributions	(11.92%)	9.98%	Jan. 23, 2009
Class A after taxes on distributions and sale of fund shares	(5.01%)	10.52%	Jan. 23, 2009
Class Y	(4.58%)	16.91%	Jan. 23, 2009
Russell 3000 Index (no deduction for fees, expenses or taxes)	1.03%	18.65%	Jan. 23, 2009
Putnam Equity Blended Index (no deduction for fees, expenses or taxes other than withholding taxes on reinvested dividends in the case of MSCI ND Index)	(2.76%)	17.92%	Jan. 23, 2009

The Putnam Equity Blended Index is an unmanaged index administered by Putnam Management, 75% of which is the Russell 3000 Index, 19% of which is the MSCI EAFE Index (ND), and 6% of which is the MSCI Emerging Markets Index (GD).

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.

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[1] No payments under the fund's distribution and service (12b-1) plan have been authorized by the Trustees. Should the Trustees decide in the future to approve payments under the plan, this prospectus will be revised.

[2] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through September 30, 2013. This obligation may be modified or discontinued only with approval of the Board of Trustees.

XML

Document and Entity Information	12 Months Ended
	Sep. 30, 2012
Risk/Return:
Document Type	485BPOS
Document Period End Date	May 31, 2012
Registrant Name	PUTNAM FUNDS TRUST
Central Index Key	0001005942
Amendment Flag	false
Document Creation Date	Sep. 28, 2012
Document Effective Date	Sep. 30, 2012
Prospectus Date	Sep. 30, 2012

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	PUTNAM FUNDS TRUST
Prospectus Date	rr_ProspectusDate	Sep. 30, 2012
Document Creation Date	dei_DocumentCreationDate	Sep. 28, 2012

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	PUTNAM FUNDS TRUST
Prospectus Date	rr_ProspectusDate	Sep. 30, 2012
Putnam Dynamic Risk Allocation Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Fund summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Dynamic Risk Allocation 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 table describes the fees and expenses you may pay if you buy and hold shares of the fund. 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 advisor and in How do I buy fund shares? beginning on page 20 of the fund's prospectus and in How to buy shares beginning on page II-1 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)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	September 30, 2013
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 for the period September 19, 2011 through May 31, 2012 was 41%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	41.00%
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. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 20 of the fund's prospectus and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	50,000
Other Expenses, New Fund, Based on Estimates [Text]	rr_OtherExpensesNewFundBasedOnEstimates	Other expenses are based on expenses of class A shares for the fund's last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.
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. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
Strategy [Heading]	rr_StrategyHeading	Investments
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The fund invests in a diversified set of asset classes. By investing in a broader set of asset classes than a traditional balanced fund, and by using leverage to increase the fund's exposures to asset classes, we believe that the fund may achieve a higher total return than a traditional balanced fund with approximately the same amount of risk as a traditional balanced fund. Risk is measured by the volatility of the fund's investment portfolio. The fund may invest without limit in U.S., international, and emerging markets equity securities (growth or value stocks or both) of companies of any size and fixed-income securities (including in high yield securities, which are sometimes referred to as "junk bonds"); mortgage- and asset-backed securities; inflation-protected securities; commodities; and real estate investment trusts. These asset classes offer different return potential and exposure to different investment risks. We allocate the fund's assets among asset classes in a manner intended to diversify the fund's exposure to these different types of risk. We typically use leverage to adjust or to increase the fund's exposure to certain asset classes in order to diversify, or balance, risk exposure. We expect that, on average, net notional investment exposure of approximately 150% of the net assets of the fund will result from the fund's allocation strategy under normal market conditions, although the amounts of leverage may be significantly higher or lower at any given time. We believe that better risk diversification creates the potential for the fund to perform well in a variety of market environments. Because the potential risks and returns of asset classes, the costs of leverage, and the benefits of diversification vary over time and with market conditions, we make dynamic adjustments to the fund's asset allocations as the market environment changes. We use qualitative analysis, which includes evaluation of the business cycle environment and its impact on different asset classes, and quantitative techniques, which incorporate individual valuation and relative valuation measures, to establish asset class allocations that we believe will enable the fund to perform well in a variety of environments. We also use active trading strategies, such as active security selection, tactical asset allocation, currency transactions and options transactions. Certain of these strategies may introduce additional investment leverage. When making particular investments within an asset class, 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, and, among other factors, credit, interest rate and prepayment risks when deciding whether to buy or sell fixed income investments. We may also take into account general market conditions when making investment decisions. We typically use derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts to a significant extent, for hedging purposes, to obtain leverage, and to adjust the return and volatility characteristics of the fund's investments. We may also engage in short sales of securities.
Risk [Heading]	rr_RiskHeading	Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	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. The prices of stocks and bonds may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific issuer or industry. These risks are generally greater for small and midsize companies. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. Bond investments are subject to interest rate risk, which means the prices of the fund's bond investments are likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuer of the bond may default on payment of interest or principal. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which may be considered speculative. Mortgage-backed investments carry the risk that they may increase in value less when interest rates decline and decline in value more 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 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 currency or other restrictions, or high levels of inflation or deflation), and may be illiquid. Our active trading strategies may lose money or not earn a return sufficient to cover trading and other costs. REITs are subject to the risk of economic downturns that have an adverse impact on real estate markets. Commodity-linked notes are subject to the same risks as commodities, such as weather, disease, political, tax and other regulatory developments and other factors affecting the value of commodities. Our use of leverage obtained through derivatives increases these risks by increasing investment exposure. Derivatives also involve the risk, in the case of over-the-counter instruments, of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. Our use of short selling may result in losses if the securities appreciate in value. 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.
Risk Lose Money [Text]	rr_RiskLoseMoney	It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	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	Performance information will be available after the fund completes a full calendar year of operation.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	Performance information will be available after the fund completes a full calendar year of operation.
Putnam Dynamic Risk Allocation Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.69%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.86%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.41%
1 year	rr_ExpenseExampleYear01	710
3 years	rr_ExpenseExampleYear03	1,085
5 years	rr_ExpenseExampleYear05	1,484
10 years	rr_ExpenseExampleYear10	2,595
Putnam Dynamic Risk Allocation Fund | Class B
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	5.00%	[3]
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.69%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.61%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	2.16%
1 year	rr_ExpenseExampleYear01	719
3 years	rr_ExpenseExampleYear03	1,069
5 years	rr_ExpenseExampleYear05	1,545
10 years	rr_ExpenseExampleYear10	2,728
1 year	rr_ExpenseExampleNoRedemptionYear01	219
3 years	rr_ExpenseExampleNoRedemptionYear03	769
5 years	rr_ExpenseExampleNoRedemptionYear05	1,345
10 years	rr_ExpenseExampleNoRedemptionYear10	2,728
Putnam Dynamic Risk Allocation Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[4]
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.69%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.61%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	2.16%
1 year	rr_ExpenseExampleYear01	319
3 years	rr_ExpenseExampleYear03	769
5 years	rr_ExpenseExampleYear05	1,345
10 years	rr_ExpenseExampleYear10	2,911
1 year	rr_ExpenseExampleNoRedemptionYear01	219
3 years	rr_ExpenseExampleNoRedemptionYear03	769
5 years	rr_ExpenseExampleNoRedemptionYear05	1,345
10 years	rr_ExpenseExampleNoRedemptionYear10	2,911
Putnam Dynamic Risk Allocation Fund | Class M
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.50%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	0.65%	[1]
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other expenses	rr_OtherExpensesOverAssets	0.69%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.36%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.91%
1 year	rr_ExpenseExampleYear01	537
3 years	rr_ExpenseExampleYear03	1,019
5 years	rr_ExpenseExampleYear05	1,527
10 years	rr_ExpenseExampleYear10	2,919
Putnam Dynamic Risk Allocation Fund | Class R
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.69%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.11%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.66%
1 year	rr_ExpenseExampleYear01	169
3 years	rr_ExpenseExampleYear03	618
5 years	rr_ExpenseExampleYear05	1,093
10 years	rr_ExpenseExampleYear10	2,406
Putnam Dynamic Risk Allocation Fund | Class R5
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets
Other expenses	rr_OtherExpensesOverAssets	0.66%	[5]
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.58%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.42%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.16%
1 year	rr_ExpenseExampleYear01	118
3 years	rr_ExpenseExampleYear03	458
5 years	rr_ExpenseExampleYear05	821
10 years	rr_ExpenseExampleYear10	1,843
Putnam Dynamic Risk Allocation Fund | Class R6
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets
Other expenses	rr_OtherExpensesOverAssets	0.56%	[5]
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.48%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.32%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.16%
1 year	rr_ExpenseExampleYear01	118
3 years	rr_ExpenseExampleYear03	437
5 years	rr_ExpenseExampleYear05	778
10 years	rr_ExpenseExampleYear10	1,741
Putnam Dynamic Risk Allocation Fund | Class Y
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.91%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets
Other expenses	rr_OtherExpensesOverAssets	0.69%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.61%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.16%
1 year	rr_ExpenseExampleYear01	118
3 years	rr_ExpenseExampleYear03	464
5 years	rr_ExpenseExampleYear05	834
10 years	rr_ExpenseExampleYear10	1,873

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through at least September 30, 2013. This obligation may be modified or discontinued only with the approval of the Board of Trustees.

[3] This charge is phased out over six years.

[4] This charge is eliminated after one year.

[5] Other expenses are based on expenses of class A shares for the fund's last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.