Label	Element	Value
Prospectus [Line Items]	rr_ProspectusLineItems
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 31, 2018
Entity Registrant Name	dei_EntityRegistrantName	PUTNAM FUNDS TRUST
Entity Central Index Key	dei_EntityCentralIndexKey	0001005942
Amendment Flag	dei_AmendmentFlag	false
Entity Inv Company Type	dei_EntityInvCompanyType	N-1A
Trading Symbol	dei_TradingSymbol	PFT
Document Creation Date	dei_DocumentCreationDate	Aug. 27, 2019
Document Effective Date	dei_DocumentEffectiveDate	Aug. 30, 2019
Prospectus Date	rr_ProspectusDate	Aug. 30, 2019
Management fees	rr_ManagementFeesOverAssets	0.15%	[1],[2]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.29%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.16%
Putnam Capital Spectrum Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Capital Spectrum Fund seeks total return.
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 25 of the fund’s prospectus, in the Appendix to 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)
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 35%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	35.00%
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 25 of the fund's prospectus, in the Appendix to 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. Your actual costs may be higher or lower.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest in equity and fixed-income securities, including floating and fixed rate bank loans, high-yield bonds, convertible securities, and both growth and value stocks, of companies of any size that we believe have favorable investment potential. The fund is “non-diversified,” which means it may invest a greater percentage of its assets in fewer issuers than a “diversified” fund. Furthermore, the fund has the flexibility to focus its investments in particular types of securities. From time to time the fund may, without limit, emphasize investments in a particular type of security (i.e., in a particular part of the capital structure) at various points during a credit cycle. This may mean that the fund may invest only modestly, or not at all, in fixed-income or equity securities at any given time. In recent years, a significant majority of the fund’s investments have consisted of equity securities. We expect to invest in leveraged companies, which employ significant leverage in their capital structure through borrowing from banks or other lenders or through issuing fixed-income, convertible or preferred equity securities, and whose fixed income securities are often rated below-investment-grade (sometimes referred to as “junk bonds”). We may also invest in fixed income securities of other issuers, in securitized debt instruments (such as mortgage- and asset-backed securities), and in companies that are not leveraged. 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, as well as general market conditions, when deciding whether to buy or sell fixed income investments. We may also engage in short sales of securities. We may invest in securities that are purchased in private placements, which are illiquid because they are subject to restrictions on resale.
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 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, 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. 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 fund will be more susceptible to these risks than other funds because it generally invests in a limited number of issuers, increasing the likelihood that its investments will focus in particular sectors. For example, because the fund currently invests significantly in certain companies in the communication services and health care sectors, the fund may perform poorly as a result of adverse developments affecting those companies or sectors. The fund may focus its investments in other sectors in the future, in which case it would be exposed to risks relating to those sectors. As a non-diversified fund, the fund invests in fewer issuers and is more vulnerable than a more broadly diversified fund to fluctuations in the values of the securities it holds. The risks associated with bond investments include interest rate risk, which means the prices of the fund’s investments are likely to fall if interest rates rise. Bond investments are also subject to credit risk, which is the risk that the issuer of a 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- and other asset-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), 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 derivatives positions and the potential failure of the other party to the instrument to meet its obligations. The fund’s investments in leveraged companies, the fund’s “non-diversified” status and the fund’s use of short selling can increase the risks of investing in 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.
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.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	As a non-diversified fund, the fund invests in fewer issuers and is more vulnerable than a more broadly diversified fund to fluctuations in the values of the securities it holds.
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. Monthly performance figures for the fund are available at putnam.com.
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 Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
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 through 6/30/19 17.11% Best calendar quarter Q1 2012   14.90% Worst calendar quarter Q4 2018 −22.02%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	17.11%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	14.90%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2018
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(22.02%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
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 B share performance reflects conversion to class A shares after eight years.
Putnam Capital Spectrum Fund | Capital Spectrum Blended Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(3.07%)	[3]
5 Years	rr_AverageAnnualReturnYear05	6.39%	[3]
Since Inception	rr_AverageAnnualReturnSinceInception	11.86%	[3]
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009	[3]
Putnam Capital Spectrum Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[4]
Management fees	rr_ManagementFeesOverAssets	0.21%	[1]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.25%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.31%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 605
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	670
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	740
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 948
Annual Return 2010	rr_AnnualReturn2010	21.64%
Annual Return 2011	rr_AnnualReturn2011	8.77%
Annual Return 2012	rr_AnnualReturn2012	24.13%
Annual Return 2013	rr_AnnualReturn2013	35.51%
Annual Return 2014	rr_AnnualReturn2014	11.96%
Annual Return 2015	rr_AnnualReturn2015	(8.99%)
Annual Return 2016	rr_AnnualReturn2016	2.46%
Annual Return 2017	rr_AnnualReturn2017	4.54%
Annual Return 2018	rr_AnnualReturn2018	(23.95%)
1 Year	rr_AverageAnnualReturnYear01	(28.32%)
5 Years	rr_AverageAnnualReturnYear05	(4.79%)
Since Inception	rr_AverageAnnualReturnSinceInception	8.52%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Capital Spectrum Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(28.32%)
5 Years	rr_AverageAnnualReturnYear05	(5.45%)
Since Inception	rr_AverageAnnualReturnSinceInception	7.61%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Capital Spectrum Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(16.77%)
5 Years	rr_AverageAnnualReturnYear05	(3.52%)
Since Inception	rr_AverageAnnualReturnSinceInception	6.80%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Capital Spectrum Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[5]
Management fees	rr_ManagementFeesOverAssets	0.21%	[1]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.25%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.06%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 608
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	638
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	786
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,085
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	108
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	338
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	586
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,085
1 Year	rr_AverageAnnualReturnYear01	(28.28%)
5 Years	rr_AverageAnnualReturnYear05	(4.71%)
Since Inception	rr_AverageAnnualReturnSinceInception	8.51%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Capital Spectrum Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[6]
Management fees	rr_ManagementFeesOverAssets	0.21%	[1]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.25%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.06%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 208
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	338
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	586
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,296
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	108
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	338
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	586
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,296
1 Year	rr_AverageAnnualReturnYear01	(25.28%)
5 Years	rr_AverageAnnualReturnYear05	(4.38%)
Since Inception	rr_AverageAnnualReturnSinceInception	8.37%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Capital Spectrum Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
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	none
Management fees	rr_ManagementFeesOverAssets	0.21%	[1]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other expenses	rr_OtherExpensesOverAssets	0.25%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.81%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 430
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	600
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	785
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,319
1 Year	rr_AverageAnnualReturnYear01	(26.99%)
5 Years	rr_AverageAnnualReturnYear05	(4.82%)
Since Inception	rr_AverageAnnualReturnSinceInception	8.24%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Capital Spectrum Fund | Class R
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.21%	[1]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.25%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.56%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 57
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	180
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	314
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 704
1 Year	rr_AverageAnnualReturnYear01	(24.14%)
5 Years	rr_AverageAnnualReturnYear05	(3.90%)
Since Inception	rr_AverageAnnualReturnSinceInception	8.92%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Capital Spectrum Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.21%	[1]
Other expenses	rr_OtherExpensesOverAssets	0.25%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.06%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 6
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	20
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	35
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 80
1 Year	rr_AverageAnnualReturnYear01	(23.77%)
5 Years	rr_AverageAnnualReturnYear05	(3.42%)
Since Inception	rr_AverageAnnualReturnSinceInception	9.46%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Equity Spectrum Fund seeks capital appreciation.
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 25 of the fund’s prospectus, in the Appendix to 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)
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 34%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	34.00%
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 25 of the fund's prospectus, in the Appendix to 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. Your actual costs may be higher or lower.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest in equity securities of companies of any size, including both growth and value stocks, that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund’s net assets in equity investments, including common stocks, preferred stocks, convertible securities and warrants. This policy may be changed only after 60 days’ notice to shareholders. For purposes of this policy, the fund treats short sales of equity securities as investments in the equity securities sold short. The fund is “non-diversified,” which means it may invest a greater percentage of its assets in fewer issuers than a “diversified” fund. We expect to invest in leveraged companies, which employ significant leverage in their capital structure through borrowing from banks or other lenders or through issuing fixed-income, convertible or preferred equity securities, and whose fixed income securities are often rated below-investment-grade (sometimes referred to as “junk bonds”). We may also invest in companies that are not leveraged. 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 engage in short sales of securities. We may invest in securities that are purchased in private placements, which are illiquid because they are subject to restrictions on resale.
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 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, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. 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 fund will be more susceptible to these risks than other funds because it generally invests in a limited number of issuers, increasing the likelihood that its investments will focus in particular sectors. For example, because the fund currently invests significantly in certain companies in the communication services and health care sectors, the fund may perform poorly as a result of adverse developments affecting those companies or sectors. The fund may focus its investments in other sectors in the future, in which case it would be exposed to risks relating to those sectors. As a non-diversified fund, the fund invests in fewer issuers and is more vulnerable than a more broadly diversified fund to fluctuations in the values of the securities it holds. 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), and may be or become illiquid. The fund’s investments in leveraged companies, the fund’s “non-diversified” status and the fund’s use of short selling can increase the risks of investing in 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.
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.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	As a non-diversified fund, the fund invests in fewer issuers and is more vulnerable than a more broadly diversified fund to fluctuations in the values of the securities it holds.
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. Monthly performance figures for the fund are available at putnam.com.
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 Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
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 through 6/30/19  15.41% Best calendar quarter Q1 2012   17.31% Worst calendar quarter Q4 2018 −21.37%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	15.41%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	17.31%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2018
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(21.37%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
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 B share performance reflects conversion to class A shares after eight years.
Putnam Equity Spectrum Fund | S&P 500 Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(4.38%)
5 Years	rr_AverageAnnualReturnYear05	8.49%
Since Inception	rr_AverageAnnualReturnSinceInception	13.46%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[4]
Management fees	rr_ManagementFeesOverAssets	0.15%	[2]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.29%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.41%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 615
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	699
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	792
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,063
Annual Return 2010	rr_AnnualReturn2010	23.59%
Annual Return 2011	rr_AnnualReturn2011	9.17%
Annual Return 2012	rr_AnnualReturn2012	24.29%
Annual Return 2013	rr_AnnualReturn2013	44.55%
Annual Return 2014	rr_AnnualReturn2014	6.10%
Annual Return 2015	rr_AnnualReturn2015	(13.96%)
Annual Return 2016	rr_AnnualReturn2016	4.00%
Annual Return 2017	rr_AnnualReturn2017	6.63%
Annual Return 2018	rr_AnnualReturn2018	(16.57%)
1 Year	rr_AverageAnnualReturnYear01	(21.37%)
5 Years	rr_AverageAnnualReturnYear05	(4.46%)
Since Inception	rr_AverageAnnualReturnSinceInception	10.36%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(21.37%)
5 Years	rr_AverageAnnualReturnYear05	(5.08%)
Since Inception	rr_AverageAnnualReturnSinceInception	9.58%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(12.65%)
5 Years	rr_AverageAnnualReturnYear05	(3.36%)
Since Inception	rr_AverageAnnualReturnSinceInception	8.41%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[5]
Management fees	rr_ManagementFeesOverAssets	0.15%	[2]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.29%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.16%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 618
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	668
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	838
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,199
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	118
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	368
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	638
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,199
1 Year	rr_AverageAnnualReturnYear01	(21.35%)
5 Years	rr_AverageAnnualReturnYear05	(4.39%)
Since Inception	rr_AverageAnnualReturnSinceInception	10.35%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[6]
Management fees	rr_ManagementFeesOverAssets	0.15%	[2]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.29%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.16%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 218
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	368
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	638
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,409
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	118
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	368
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	638
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,409
1 Year	rr_AverageAnnualReturnYear01	(18.04%)
5 Years	rr_AverageAnnualReturnYear05	(4.05%)
Since Inception	rr_AverageAnnualReturnSinceInception	10.21%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
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	none
Management fees	rr_ManagementFeesOverAssets	0.15%	[2]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other expenses	rr_OtherExpensesOverAssets	0.29%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.91%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 440
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	630
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	836
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,430
1 Year	rr_AverageAnnualReturnYear01	(19.89%)
5 Years	rr_AverageAnnualReturnYear05	(4.49%)
Since Inception	rr_AverageAnnualReturnSinceInception	10.08%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class R
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.15%	[2]
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.29%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.66%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 67
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	211
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	368
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 822
1 Year	rr_AverageAnnualReturnYear01	(16.78%)
5 Years	rr_AverageAnnualReturnYear05	(3.57%)
Since Inception	rr_AverageAnnualReturnSinceInception	10.76%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Equity Spectrum Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.15%	[2]
Other expenses	rr_OtherExpensesOverAssets	0.29%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.16%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 16
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	52
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	90
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 205
1 Year	rr_AverageAnnualReturnYear01	(16.39%)
5 Years	rr_AverageAnnualReturnYear05	(3.08%)
Since Inception	rr_AverageAnnualReturnSinceInception	11.32%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 18, 2009
Putnam Multi-Cap Core Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Multi-Cap Core Fund seeks capital appreciation.
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 12 of the fund’s prospectus, in the Appendix to 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)
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 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 12 of the fund's prospectus, in the Appendix to 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. Your actual costs may be higher or lower.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest mainly in common stocks (growth or value stocks or both) of U.S. companies of any size that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise. 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.
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 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, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. 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 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	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. Monthly performance figures for the fund are available at putnam.com.
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 Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
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 through 6/30/19  16.80% Best calendar quarter Q1 2012   15.36% Worst calendar quarter Q3 2011 −17.17%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	16.80%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	15.36%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(17.17%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
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.
Putnam Multi-Cap Core Fund | Russell 3000 Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(5.24%)	[7]
5 Years	rr_AverageAnnualReturnYear05	7.91%	[7]
Since Inception	rr_AverageAnnualReturnSinceInception	12.02%	[7]
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010	[7]
Putnam Multi-Cap Core Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[4]
Management fees	rr_ManagementFeesOverAssets	0.55%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.22%	[8]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.02%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 673
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	881
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,106
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,751
Annual Return 2011	rr_AnnualReturn2011	0.21%
Annual Return 2012	rr_AnnualReturn2012	18.10%
Annual Return 2013	rr_AnnualReturn2013	41.56%
Annual Return 2014	rr_AnnualReturn2014	13.55%
Annual Return 2015	rr_AnnualReturn2015	(3.12%)
Annual Return 2016	rr_AnnualReturn2016	13.33%
Annual Return 2017	rr_AnnualReturn2017	23.68%
Annual Return 2018	rr_AnnualReturn2018	(8.16%)
1 Year	rr_AverageAnnualReturnYear01	(13.44%)
5 Years	rr_AverageAnnualReturnYear05	5.94%
Since Inception	rr_AverageAnnualReturnSinceInception	12.30%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010
Putnam Multi-Cap Core Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(13.87%)
5 Years	rr_AverageAnnualReturnYear05	5.51%
Since Inception	rr_AverageAnnualReturnSinceInception	11.14%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010
Putnam Multi-Cap Core Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(7.58%)
5 Years	rr_AverageAnnualReturnYear05	4.61%
Since Inception	rr_AverageAnnualReturnSinceInception	9.66%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010
Putnam Multi-Cap Core Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[5]
Management fees	rr_ManagementFeesOverAssets	0.55%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.22%	[8]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.77%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 680
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	857
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,159
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,886
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	180
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	557
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	959
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,886
1 Year	rr_AverageAnnualReturnYear01	(13.31%)
5 Years	rr_AverageAnnualReturnYear05	6.09%
Since Inception	rr_AverageAnnualReturnSinceInception	12.28%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010
Putnam Multi-Cap Core Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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%	[6]
Management fees	rr_ManagementFeesOverAssets	0.55%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.22%	[8]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.77%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 280
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	557
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	959
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,084
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	180
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	557
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	959
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 2,084
1 Year	rr_AverageAnnualReturnYear01	(9.75%)
5 Years	rr_AverageAnnualReturnYear05	6.41%
Since Inception	rr_AverageAnnualReturnSinceInception	12.26%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010
Putnam Multi-Cap Core Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
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	none
Management fees	rr_ManagementFeesOverAssets	0.55%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other expenses	rr_OtherExpensesOverAssets	0.22%	[8]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.52%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 499
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	813
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,150
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 2,099
1 Year	rr_AverageAnnualReturnYear01	(11.84%)
5 Years	rr_AverageAnnualReturnYear05	5.92%
Since Inception	rr_AverageAnnualReturnSinceInception	12.06%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010
Putnam Multi-Cap Core Fund | Class R
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.55%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.22%	[8]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.27%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 129
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	403
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	697
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,534
1 Year	rr_AverageAnnualReturnYear01	(8.40%)
5 Years	rr_AverageAnnualReturnYear05	6.94%
Since Inception	rr_AverageAnnualReturnSinceInception	12.83%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010
Putnam Multi-Cap Core Fund | Class R6
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.55%
Other expenses	rr_OtherExpensesOverAssets	0.10%	[8],[9]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.65%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 66
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	208
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	362
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 810
1 Year	rr_AverageAnnualReturnYear01	(7.87%)	[10]
5 Years	rr_AverageAnnualReturnYear05	7.48%	[10]
Since Inception	rr_AverageAnnualReturnSinceInception	13.40%	[10]
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010	[10]
Putnam Multi-Cap Core Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.55%
Other expenses	rr_OtherExpensesOverAssets	0.22%	[8]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.77%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 79
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	246
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	428
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 954
1 Year	rr_AverageAnnualReturnYear01	(7.91%)
5 Years	rr_AverageAnnualReturnYear05	7.47%
Since Inception	rr_AverageAnnualReturnSinceInception	13.39%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 24, 2010

[1] Management fees reflect a performance adjustment. The fund's base management fee is subject to adjustment, up or down, based on the fund's performance relative to the performance of a 50/50 blend (balanced daily) of the S&P 500 Index and JPMorgan Developed High Yield Index. Management fees for the most recent fiscal year are negative because the fund's negative performance adjustment exceeded the fund's base management fee. For the most recent fiscal year, the fund's base management fee prior to any performance adjustment was 0.72%.

[2] Management fees reflect a performance adjustment. The fund's base management fee is subject to adjustment, up or down, based on the fund's performance relative to the performance of the S&P 500 Index. Management fees for the most recent fiscal year are negative because the funds negative performance adjustment exceeded the funds base management fee. For the most recent fiscal year, the funds base management fee prior to any performance adjustment was 0.72%

[3] The Putnam Capital Spectrum Blended Index is an unmanaged index administered by Putnam Management, 50% of which is the S&P 500 Index and 50% of which is the JPMorgan Developed High Yield Index.

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

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

[6] This charge is eliminated after one year.

[7] Frank Russell Company is the source and owner of the trademarks, service marks and copyrights related to the Russell Indexes. Russell(R) is a trademark of Frank Russell Company.

[8] Restated to reflect current fees.

[9] Other expenses shown for class R6 shares have been annualized.

[10] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it, returns would have been higher.