v3.25.2
Label Element Value
INCOME FUND OF AMERICA  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading The Income Fund of America
Objective [Heading] oef_ObjectiveHeading Investment objectives
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

The fund’s investment objectives are to provide you with current income while

Objective, Secondary [Text Block] oef_ObjectiveSecondaryTextBlock secondarily striving for capital growth.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and expenses of the fund
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

This table describes the fees and expenses that 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. For example, in addition to the fees and expenses described below, you may also be required to pay brokerage commissions on purchases and sales of Class F-2, F-3, 529-F-2 or 529-F-3 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 $25,000 in American Funds, Capital Group KKR Public-Private+ Funds, and/or Emerging Markets Equities Fund, Inc. (collectively “Capital Group Funds”) ($250,000 for Class 529-A shares). More information about these and other discounts is available from your financial professional, in the “Sales charge reductions and waivers” sections on page 37 of the prospectus and on page 90 of the fund’s statement of additional information, and in the sales charge waiver appendix to the prospectus.
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Expenses Deferred Charges [Text Block] oef_ExpensesDeferredChargesTextBlock A contingent deferred sales charge of 1.00% applies on certain redemptions made within 18 months following purchases of $1 million or more made without an initial sales charge. Contingent deferred sales charge is calculated based on the lesser of the offering price and market value of shares being sold.
Expense Breakpoint Discounts [Text] oef_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in American Funds, Capital Group KKR Public-Private+ Funds, and/or Emerging Markets Equities Fund, Inc. (collectively “Capital Group Funds”) ($250,000 for Class 529-A shares).
Expense Breakpoint, Minimum Investment Required [Amount] oef_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 25,000
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. You may be required to pay brokerage commissions on your purchases and sales of Class F-2, F-3, 529-F-2 or 529-F-3 shares of the fund, which are not reflected in the example.

Expense Example by, Year, Caption [Text] oef_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] oef_ExpenseExampleNoRedemptionByYearCaption For the share classes listed to the right, you would pay the following if you did not redeem your shares:
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s investment results. During the most recent fiscal year, the fund’s portfolio turnover rate was 65% of the average value of its portfolio.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 65.00%
Strategy [Heading] oef_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

Normally the fund invests primarily in income-producing securities. These include equity securities, such as dividend-paying common stocks, and debt securities, such as interest-paying bonds.

Generally at least 60% of the fund’s assets will be invested in common stocks and other equity-type securities. However, the composition of the fund’s investments in equity, debt and cash or money market instruments may vary substantially depending on various factors, including market conditions. The fund may also invest up to 30% of its assets in common stocks and other equity-type securities of issuers domiciled outside the United States, including issuers in emerging markets. In addition, the fund may invest up to 20% of its assets in lower quality, higher yielding nonconvertible debt securities (rated Ba1 and BB+ or below by Nationally Recognized Statistical Rating Organizations designated by the fund’s investment adviser or unrated but determined to be of equivalent quality by the fund’s investment adviser); such securities are sometimes referred to as “junk bonds.” The fund may also invest up to 10% of its assets in debt securities tied economically to countries outside the United States; however, these securities must be denominated in U.S. dollars.

The investment adviser uses a system of multiple portfolio managers in managing the fund’s assets. Under this approach, the portfolio of the fund is divided into segments managed by individual managers.

The fund relies on the professional judgment of its investment adviser to make decisions about the fund’s portfolio investments. The basic investment philosophy of the investment adviser is to seek to invest in attractively valued companies that, in its opinion, represent good, long-term investment opportunities. Securities may be sold when the investment adviser believes that they no longer represent relatively attractive investment opportunities.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Investment results
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The following bar chart shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compare with a broad measure of securities market results and, if applicable, other measures of market results that reflect the fund’s investment universe. This information provides some indication of the risks of investing in the fund. Past investment results (before and after taxes) are not predictive of future investment results. Prior to October 30, 2020, certain fees, such as 12b-1 fees, were not charged on Class 529-F-1 shares. If these expenses had been deducted, results would have been lower. Updated information on the fund’s investment results can be obtained by visiting capitalgroup.com.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compare with a broad measure of securities market results and, if applicable, other measures of market results that reflect the fund’s investment universe.
Performance Availability Phone [Text] oef_PerformanceAvailabilityPhone (800) 421-4225
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress capitalgroup.com
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Past investment results (before and after taxes) are not predictive of future investment results.
Bar Chart [Heading] oef_BarChartHeading Calendar year total returns for Class F-2 shares (Class F-2 shares are not subject to sales charges.)
Bar Chart Narrative [Text Block] oef_BarChartNarrativeTextBlock

The following bar chart shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compare with a broad measure of securities market results and, if applicable, other measures of market results that reflect the fund’s investment universe.
Bar Chart Does Not Reflect Sales Loads [Text] oef_BarChartDoesNotReflectSalesLoads Class F-2 shares are not subject to sales charges.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

Highest/Lowest quarterly results during this period were:

 

Highest 10.33% (quarter ended December 31, 2022)

 

Lowest -16.16% (quarter ended March 31, 2020)

 

The fund's total return for the six months ended June 30, 2025, was 10.66%.

 
Year to Date Return, Label [Optional Text] oef_YearToDateReturnLabel The fund's total return for the six months ended
Bar Chart, Year to Date Return, Date oef_BarChartYearToDateReturnDate Jun. 30, 2025
Bar Chart, Year to Date Return oef_BarChartYearToDateReturn 10.66%
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Highest
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Dec. 31, 2022
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 10.33%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Lowest
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (16.16%)
Performance Table Uses Highest Federal Rate oef_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual federal income tax rates in effect during each year of the periods shown and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred oef_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns depend on your individual tax situation and likely will differ from the results shown above. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-favored arrangement, such as a 401(k) plan, individual retirement account (IRA) or 529 college savings plan.
Performance Table One Class of after Tax Shown [Text] oef_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Class F-2 shares; after-tax returns for other share classes will vary.
Performance Table Closing [Text Block] oef_PerformanceTableClosingTextBlock

After-tax returns are shown only for Class F-2 shares; after-tax returns for other share classes will vary. After-tax returns are calculated using the highest individual federal income tax rates in effect during each year of the periods shown and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation and likely will differ from the results shown above. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-favored arrangement, such as a 401(k) plan, individual retirement account (IRA) or 529 college savings plan.
Average Annual Return, Caption [Optional Text] oef_AverageAnnualReturnCaption Average annual total returns For the periods ended December 31, 2024:
Thirty Day Yield Caption [Optional Text] oef_ThirtyDayYieldCaption Class F-2 annualized 30–day yield at July 31, 2025:
Thirty Day Yield Phone oef_ThirtyDayYieldPhone (800) 421-4225
Thirty Day Yield oef_ThirtyDayYield 3.60%
INCOME FUND OF AMERICA | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock You may lose money by investing in the fund.
INCOME FUND OF AMERICA | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Your investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, entity or person.
INCOME FUND OF AMERICA | Market conditions [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Market conditions — The prices of, and the income generated by, the common stocks and other securities held by the fund may decline – sometimes rapidly or unpredictably – due to various factors, including events or conditions affecting the general economy or particular industries or companies; overall market changes; local, regional or global political, social or economic instability; governmental, governmental agency or central bank responses to economic conditions; levels of public debt and deficits; changes in inflation rates; and currency exchange rate, interest rate and commodity price fluctuations.

Economies and financial markets throughout the world are highly interconnected. Economic, financial or political events, trading and tariff arrangements, wars, terrorism, cybersecurity events, natural disasters, public health emergencies (such as the spread of infectious disease), bank failures and other circumstances in one country or region, including actions taken by governmental or quasi-governmental authorities in response to any of the foregoing, could have impacts on global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries affected, the value and liquidity of the fund’s investments may be negatively affected by developments in other countries and regions.
INCOME FUND OF AMERICA | Issuer risks [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Issuer risks — The prices of, and the income generated by, securities held by the fund may decline in response to various factors directly related to the issuers of such securities, including reduced demand for an issuer’s goods or services, poor management performance, major litigation, investigations or other controversies related to the issuer, changes in the issuer’s financial condition or credit rating, changes in government regulations affecting the issuer or its competitive environment and strategic initiatives such as mergers, acquisitions or dispositions and the market response to any such initiatives. An individual security may also be affected by factors relating to the industry or sector of the issuer or the securities markets as a whole, and conversely an industry or sector or the securities markets may be affected by a change in financial condition or other event affecting a single issuer.
INCOME FUND OF AMERICA | Investing in income-oriented stocks [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investing in income-oriented stocks — The value of the fund’s securities and income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available for dividend payments at, the companies in which the fund invests.
INCOME FUND OF AMERICA | Investing in debt instruments [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investing in debt instruments — The prices of, and the income generated by, bonds and other debt securities held by the fund may be affected by factors such as the interest rates, maturities and credit quality of these securities.

Rising interest rates will generally cause the prices of bonds and other debt securities to fall. Also, when interest rates rise, issuers of debt securities that may be prepaid at any time, such as mortgage- or other asset-backed securities, are less likely to refinance existing debt securities, causing the average life of such securities to extend. A general change in interest rates may cause investors to sell debt securities on a large scale, which could also adversely affect the price and liquidity of debt securities and could also result in increased redemptions from the fund. Falling interest rates may cause an issuer to redeem, call or refinance a debt security before its stated maturity, which may result in the fund having to reinvest the proceeds in lower yielding securities. Longer maturity debt securities generally have greater sensitivity to changes in interest rates and may be subject to greater price fluctuations than shorter maturity debt securities.

Bonds and other debt securities are also subject to credit risk, which is the possibility that the credit strength of an issuer or guarantor will weaken or be perceived to be weaker, and/or an issuer of a debt security will fail to make timely payments of principal or interest and the security will go into default. Changes in actual or perceived creditworthiness may occur quickly. A downgrade or default affecting any of the fund’s securities could cause the value of the fund’s shares to decrease. Lower quality debt securities generally have higher rates of interest and may be subject to greater price fluctuations than higher quality debt securities. Credit risk is gauged, in part, by the credit ratings of the debt securities in which the fund invests. However, ratings are only the opinions of the rating agencies issuing them and are not guarantees as to credit quality or an evaluation of market risk. The fund’s investment adviser relies on its own credit analysts to research issuers and issues in assessing credit and default risks.
INCOME FUND OF AMERICA | Investing in lower rated debt instruments [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investing in lower rated debt instruments — Lower rated bonds and other lower rated debt securities, rated Ba1/BB+ or below by Nationally Recognized Statistical Rating Organizations, generally have higher rates of interest and involve greater risk of default or price declines due to changes in the issuer’s creditworthiness than those of higher quality debt securities. The market prices of these securities may fluctuate more than the

prices of higher quality debt securities and may decline significantly in periods of general economic difficulty. These risks may be increased with respect to investments in junk bonds.

INCOME FUND OF AMERICA | Investing outside the United States [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investing outside the United States — Securities of issuers domiciled outside the United States or with significant operations or revenues outside the United States, and securities tied economically to countries outside the United States, may lose value because of adverse political, social, economic or market developments (including social instability, regional conflicts, terrorism and war) in the countries or regions in which the issuers are domiciled, operate or generate revenue or to which the securities are tied economically. These securities may also lose value due to changes in foreign currency exchange rates against the U.S. dollar and/or currencies of other countries. Issuers of these securities may be more susceptible to actions of foreign governments, such as nationalization, currency blockage or the imposition of price controls, sanctions, or punitive taxes, each of which could adversely impact the value of these securities. Securities markets in certain countries may be more volatile and/or less liquid than those in the United States. Investments outside the United States may also be subject to different regulatory, legal, accounting, auditing, financial reporting and recordkeeping requirements, and may be more difficult to value, than those in the United States. In addition, the value of investments outside the United States may be reduced by foreign taxes, including foreign withholding taxes on interest and dividends. Further, there may be increased risks of delayed settlement of securities purchased or sold by the fund, which could impact the liquidity of the fund’s portfolio. The risks of investing outside the United States may be heightened in connection with investments in emerging markets.
INCOME FUND OF AMERICA | Management [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Management — The investment adviser to the fund actively manages the fund’s investments. Consequently, the fund is subject to the risk that the methods and analyses, including models, tools and data, employed by the investment adviser in this process may be flawed or incorrect and may not produce the desired results. This could cause the fund to lose value or its investment results to lag relevant benchmarks or other funds with similar objectives.
INCOME FUND OF AMERICA | Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1]
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.09%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.56%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 629
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 744
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 870
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,236
INCOME FUND OF AMERICA | Class R-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.99%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.13%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.34%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 136
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 425
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 734
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,613
INCOME FUND OF AMERICA | Class R-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.38%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.35%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 137
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 428
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 739
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,624
INCOME FUND OF AMERICA | Class R-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.18%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.90%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 92
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 287
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 498
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,108
INCOME FUND OF AMERICA | Class R-4  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.61%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 62
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 195
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 340
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 762
INCOME FUND OF AMERICA | Class R-5  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.08%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.30%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 31
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 97
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 169
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 381
INCOME FUND OF AMERICA | Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.09%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.31%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 233
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 415
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 718
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,372
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 133
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 415
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 718
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,372
INCOME FUND OF AMERICA | Class F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.16%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.63%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 64
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 202
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 351
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 786
INCOME FUND OF AMERICA | Class 529-A  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 3.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1]
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.23%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.59%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 408
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 532
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 668
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,062
INCOME FUND OF AMERICA | Class 529-C  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.99%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.35%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 237
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 428
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 739
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,133
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 137
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 428
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 739
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,133
INCOME FUND OF AMERICA | Class 529-E  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.11%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.83%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 85
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 265
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 460
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,025
INCOME FUND OF AMERICA | Class 529-F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.68%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 69
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 218
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 379
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 847
INCOME FUND OF AMERICA | Class F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.37%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 38
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 119
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 208
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 468
INCOME FUND OF AMERICA | Class R-6  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.04%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.26%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 27
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 84
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 146
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 331
INCOME FUND OF AMERICA | Class R-2E  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.60%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.24%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.06%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 108
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 337
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 585
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,294
INCOME FUND OF AMERICA | Class R-5E  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.19%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.41%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 42
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 132
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 230
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 518
INCOME FUND OF AMERICA | Class F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.04%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.26%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 27
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 84
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 146
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 331
INCOME FUND OF AMERICA | Class 529-T  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.61%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 311
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 440
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 582
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 993
INCOME FUND OF AMERICA | Class T  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.09%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.56%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 306
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 425
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 555
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 934
INCOME FUND OF AMERICA | Class 529-F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.12%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.34%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 35
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 109
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 191
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 431
INCOME FUND OF AMERICA | Class 529-F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.09%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.31%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 32
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 100
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 174
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 393
65%/35% S&P 500 Index/Bloomberg U.S. Aggregate Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 16.26%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.41%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.10%
Average Annual Return, Percent oef_AvgAnnlRtrPct 8.99%
Bloomberg U.S. Aggregate Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct (0.33%)
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.35%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.77%
S&P 500 Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 25.02%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.53%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.10%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.02%
Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.46%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.32%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.09%
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.31%
Performance Inception Date oef_PerfInceptionDate Dec. 01, 1973
Class R-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.01%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.75%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.87%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.48%
Performance Inception Date oef_PerfInceptionDate Jun. 17, 2002
Class R-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.98%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.74%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.87%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.33%
Performance Inception Date oef_PerfInceptionDate May 31, 2002
Class R-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.53%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.22%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.34%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.87%
Performance Inception Date oef_PerfInceptionDate Jun. 04, 2002
Class R-4  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.82%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.53%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.66%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.42%
Performance Inception Date oef_PerfInceptionDate Jun. 27, 2002
Class R-5  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.18%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.86%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.99%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.44%
Performance Inception Date oef_PerfInceptionDate May 15, 2002
Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.05%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.79%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.06%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.91%
Performance Inception Date oef_PerfInceptionDate Mar. 15, 2001
Class F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.75%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.50%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.64%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.14%
Performance Inception Date oef_PerfInceptionDate Mar. 15, 2001
Class 529-A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.94%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.78%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.28%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.08%
Performance Inception Date oef_PerfInceptionDate Feb. 15, 2002
Class 529-C  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 8.96%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.73%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.10%
Performance Inception Date oef_PerfInceptionDate Feb. 19, 2002
Class 529-E  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.57%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.29%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.41%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.96%
Performance Inception Date oef_PerfInceptionDate Feb. 25, 2002
Class 529-F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.02%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.72%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.87%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.98%
Performance Inception Date oef_PerfInceptionDate Sep. 17, 2002
Class F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct (1.35%)
Annual Return [Percent] oef_AnnlRtrPct 10.78%
Annual Return [Percent] oef_AnnlRtrPct 13.57%
Annual Return [Percent] oef_AnnlRtrPct (4.95%)
Annual Return [Percent] oef_AnnlRtrPct 19.16%
Annual Return [Percent] oef_AnnlRtrPct 5.15%
Annual Return [Percent] oef_AnnlRtrPct 17.64%
Annual Return [Percent] oef_AnnlRtrPct (6.22%)
Annual Return [Percent] oef_AnnlRtrPct 7.78%
Annual Return [Percent] oef_AnnlRtrPct 11.08%
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.08%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.79%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.92%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.56%
Performance Inception Date oef_PerfInceptionDate Aug. 01, 2008
Class F-2 | After Taxes on Distributions  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.09%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.20%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.38%
Class F-2 | After Taxes on Distributions and Sales  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.41%
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.98%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.14%
Class R-6  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.22%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.91%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.03%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.83%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-2E  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.34%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.05%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.20%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.01%
Performance Inception Date oef_PerfInceptionDate Aug. 29, 2014
Class R-5E  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.04%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.75%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.58%
Performance Inception Date oef_PerfInceptionDate Nov. 20, 2015
Class F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.24%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.91%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.46%
Performance Inception Date oef_PerfInceptionDate Jan. 27, 2017
Class 529-F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.12%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.69%
Performance Inception Date oef_PerfInceptionDate Oct. 30, 2020
Class 529-F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.17%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.74%
Performance Inception Date oef_PerfInceptionDate Oct. 30, 2020
[1] A contingent deferred sales charge of 1.00% applies on certain redemptions made within 18 months following purchases of $1 million or more made without an initial sales charge. Contingent deferred sales charge is calculated based on the lesser of the offering price and market value of shares being sold.