| Label | Element | Value | ||||
|---|---|---|---|---|---|---|
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Document Type | dei_DocumentType | 485BPOS | ||||
| Document Period End Date | dei_DocumentPeriodEndDate | Dec. 31, 2024 | ||||
| Entity Registrant Name | dei_EntityRegistrantName | Putnam Large Cap Value Fund | ||||
| Entity Central Index Key | dei_EntityCentralIndexKey | 0000216934 | ||||
| Entity Inv Company Type | dei_EntityInvCompanyType | N-1A | ||||
| Amendment Flag | dei_AmendmentFlag | false | ||||
| Putnam Equity Income Fund | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Fund Summary | ||||
| Objective [Heading] | rr_ObjectiveHeading | Goal | ||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The fund seeks capital growth and current income. |
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| Expense [Heading] | rr_ExpenseHeading | Fees and expenses | ||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | The following tables describe the fees and expenses you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. More information about these and other discounts is available from your financial professional and in How do I buy fund shares? beginning on page 15 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page 18 of the fund’s statement of additional information (“SAI”). |
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| 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 16%. |
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| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 16.00% | ||||
| Expense Breakpoint Discounts [Text] | rr_ExpenseBreakpointDiscounts | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. | ||||
| Expense Breakpoint, Minimum Investment Required [Amount] | rr_ExpenseBreakpointMinimumInvestmentRequiredAmount | $ 50,000 | ||||
| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | ||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower. |
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| Strategy [Heading] | rr_StrategyHeading | Investments, risks, and performance | ||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Investments We invest mainly in common stocks of U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Under normal circumstances, we invest at least 80% of the fund’s net assets in large-cap companies, which, for purposes of this policy, are of a size similar to those in the Russell 1000 Value Index. This policy may be changed only after 60 days’ notice to shareholders. As of January 31, 2025, the index was composed of companies having market capitalizations of between approximately $338.1 million to $1.0 trillion. We may also invest in midsize companies. Value stocks are issued by companies that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may 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. |
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| Risk [Heading] | rr_RiskHeading | Risks | ||||
| Risk [Text Block] | rr_RiskTextBlock | It is important to understand that you can lose money by investing in the fund. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings, may negatively impact the fund’s performance, and may exacerbate other risks to which the fund is subject. Companies whose stocks we believe are undervalued by the market may have experienced adverse business developments or may be subject to special risks that have caused their stocks to be out of favor. Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests. The fund may be an investment option for mutual funds that are managed by the Investment Manager and its affiliates as “funds of funds.” Additionally, other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. There is no guarantee that the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected for the fund. We, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
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| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance | ||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The accompanying bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Class A shares. The table shows the average annual total returns of each class of the fund that has been in operation for at least one full calendar year and also compares the fund’s performance with the average annual total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value per share, available at www.franklintempleton.com. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown. |
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| Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | The accompanying bar chart and table provide some indication of the risks of investing in the fund. | ||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.franklintempleton.com | ||||
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. | ||||
| Bar Chart [Heading] | rr_BarChartHeading | Annual total returns for class A shares before sales charges | ||||
| Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown. | ||||
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best calendar quarter | ||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Jun. 30, 2020 | ||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 17.47% | ||||
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst calendar quarter | ||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | ||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (25.18%) | ||||
| Performance Table Heading | rr_PerformanceTableHeading | Average annual total returns after sales charges For periods ended 12/31/24 | ||||
| Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. | ||||
| Performance Table Not Relevant to Tax Deferred | rr_PerformanceTableNotRelevantToTaxDeferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. | ||||
| Performance Table One Class of after Tax Shown [Text] | rr_PerformanceTableOneClassOfAfterTaxShown | After-tax returns are shown for class A shares only and will vary for other classes. | ||||
| Performance Table Closing [Text Block] | rr_PerformanceTableClosingTextBlock | After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class C share performance reflects conversion to class A shares after eight years. Important data provider notices and terms are available at www.franklintempletondatasources.com. All data is subject to change. |
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| Putnam Equity Income Fund | Russell 3000 Index (no deduction for fees, expenses or taxes) | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| 1 Year | rr_AverageAnnualReturnYear01 | 23.81% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 13.86% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 12.55% | ||||
| Putnam Equity Income Fund | Russell 1000 Value Index (no deduction for fees, expenses or taxes) | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| 1 Year | rr_AverageAnnualReturnYear01 | 14.37% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.68% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.49% | ||||
| Putnam Equity Income Fund | Class A | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 5.75% | ||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | 1.00% | [1] | |||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.46% | ||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | ||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.88% | ||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 660 | ||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 840 | ||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 1,035 | ||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,597 | ||||
| Annual Return 2015 | rr_AnnualReturn2015 | (3.18%) | ||||
| Annual Return 2016 | rr_AnnualReturn2016 | 13.55% | ||||
| Annual Return 2017 | rr_AnnualReturn2017 | 18.69% | ||||
| Annual Return 2018 | rr_AnnualReturn2018 | (8.34%) | ||||
| Annual Return 2019 | rr_AnnualReturn2019 | 29.93% | ||||
| Annual Return 2020 | rr_AnnualReturn2020 | 5.83% | ||||
| Annual Return 2021 | rr_AnnualReturn2021 | 26.84% | ||||
| Annual Return 2022 | rr_AnnualReturn2022 | (3.09%) | ||||
| Annual Return 2023 | rr_AnnualReturn2023 | 15.40% | ||||
| Annual Return 2024 | rr_AnnualReturn2024 | 19.01% | ||||
| 1 Year | rr_AverageAnnualReturnYear01 | 12.16% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 10.98% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 10.10% | ||||
| Putnam Equity Income Fund | Class A | After Taxes on Distributions | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| 1 Year | rr_AverageAnnualReturnYear01 | 10.51% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 9.35% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.74% | ||||
| Putnam Equity Income Fund | Class A | After Taxes on Distributions and Sales | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| 1 Year | rr_AverageAnnualReturnYear01 | 8.46% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.44% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.93% | ||||
| Putnam Equity Income Fund | Class C | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | 1.00% | [2] | |||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.46% | ||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 1.00% | ||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.63% | ||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 266 | ||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 514 | ||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 887 | ||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | 1,732 | ||||
| Expense Example, No Redemption, 1 Year | rr_ExpenseExampleNoRedemptionYear01 | 166 | ||||
| Expense Example, No Redemption, 3 Years | rr_ExpenseExampleNoRedemptionYear03 | 514 | ||||
| Expense Example, No Redemption, 5 Years | rr_ExpenseExampleNoRedemptionYear05 | 887 | ||||
| Expense Example, No Redemption, 10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,732 | ||||
| 1 Year | rr_AverageAnnualReturnYear01 | 17.13% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 11.46% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 10.09% | ||||
| Putnam Equity Income Fund | Class R | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.46% | ||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.50% | ||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 1.13% | ||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 115 | ||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 359 | ||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 622 | ||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 1,375 | ||||
| 1 Year | rr_AverageAnnualReturnYear01 | 18.73% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 12.02% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 10.47% | ||||
| Putnam Equity Income Fund | Class R5 | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.46% | ||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.18% | ||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.64% | ||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 65 | ||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 205 | ||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 357 | ||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 798 | ||||
| 1 Year | rr_AverageAnnualReturnYear01 | 19.33% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 12.58% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 11.04% | ||||
| Putnam Equity Income Fund | Class R6 | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.46% | ||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.08% | ||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.54% | ||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 55 | ||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 173 | ||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 302 | ||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 677 | ||||
| 1 Year | rr_AverageAnnualReturnYear01 | 19.42% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 12.69% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 11.16% | ||||
| Putnam Equity Income Fund | Class Y | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||
| Maximum Deferred Sales Charge (as a percentage) | rr_MaximumDeferredSalesChargeOverOther | none | ||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.46% | ||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | 0.17% | ||||
| Expenses (as a percentage of Assets) | rr_ExpensesOverAssets | 0.63% | ||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 64 | ||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | 202 | ||||
| Expense Example, with Redemption, 5 Years | rr_ExpenseExampleYear05 | 351 | ||||
| Expense Example, with Redemption, 10 Years | rr_ExpenseExampleYear10 | $ 786 | ||||
| 1 Year | rr_AverageAnnualReturnYear01 | 19.34% | ||||
| 5 Years | rr_AverageAnnualReturnYear05 | 12.59% | ||||
| 10 Years | rr_AverageAnnualReturnYear10 | 11.03% | ||||
| Putnam Equity Income Fund | Risk Lose Money [Member] | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Risk [Text Block] | rr_RiskTextBlock | t is important to understand that you can lose money by investing in the fund. | ||||
| Putnam Equity Income Fund | Risk Not Insured Depository Institution [Member] | ||||||
| Prospectus [Line Items] | rr_ProspectusLineItems | |||||
| Risk [Text Block] | rr_RiskTextBlock | An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||
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