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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading INCOME FUND OF AMERICA®
Objective [Heading] rr_ObjectiveHeading Investment objectives
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The fund’s investment objectives are to provide you with current income
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock

while secondarily striving for capital growth.

Expense [Heading] rr_ExpenseHeading Fees and expenses of the fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that 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 $25,000 in American Funds. More information about these and other discounts is available from your financial professional and in the “Sales charge reductions and waivers” section on page 28 of the prospectus and on page 60 of the fund’s statement of additional information.

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 that 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 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 47% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 47.00%
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 $25,000 in American Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 25,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_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 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.
Expense Example by, Year, Caption [Text] rr_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] rr_ExpenseExampleNoRedemptionByYearCaption For the share classes listed below, you would pay the following if you did not redeem your shares:
Strategy [Heading] rr_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] rr_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 25% of its assets in equity securities of issuers domiciled outside the United States, including issuers in developing countries. 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 of issuers domiciled 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 who decide how their respective segments will be invested.


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. The investment adviser believes that an important way to accomplish this is through fundamental analysis, which may include meeting with company executives and employees, suppliers, customers and competitors. Securities may be sold when the investment adviser believes that they no longer represent relatively attractive investment opportunities.

Risk [Heading] rr_RiskHeading Principal risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

This section describes the principal risks associated with the fund’s principal investment strategies. You may lose money by investing in the fund. The likelihood of loss may be greater if you invest for a shorter period of time. Investors in the fund should have a long-term perspective and be able to tolerate potentially sharp declines in value.


Market conditions — The prices of, and the income generated by, the common stocks and other securities held by the fund may decline due to market conditions and other factors, including those directly involving the issuers of securities held by the fund.


Investing in income-oriented stocks — 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.


Investing in bonds — Rising interest rates will generally cause the prices of bonds and other debt securities to fall. Longer maturity debt securities may be subject to greater price fluctuations than shorter maturity debt securities. In addition, 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.


Bonds and other debt securities are subject to credit risk, which is the possibility that the credit strength of an issuer will weaken 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. Credit risk is gauged, in part, by the credit ratings of the 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 seeking to mitigate the risks of an issuer defaulting on its obligations.


Investing in lower rated bonds — Lower rated bonds and other lower rated debt securities 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.


Investing outside the United States — Securities of issuers domiciled outside the United States, or with significant operations outside the United States, may lose value because of adverse political, social, economic or market developments in the countries or regions in which the issuers operate. 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. 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 settlement and accounting practices and different regulatory, legal and reporting standards, and may be more difficult to value, than those in the United States. The risks of investing outside the United States may be heightened in connection with investments in emerging markets.


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 employed by the investment adviser in this process 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.


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. You should consider how this fund fits into your overall investment program.

Risk Lose Money [Text] rr_RiskLoseMoney You may lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Investment results
Performance Narrative [Text Block] rr_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 different broad measures of market results. This information provides some indication of the risks of investing in the fund. The Barclays U.S. Aggregate Index is a gauge of the U.S. investment-grade bond market and reflects a portion of the fixed-income securities in which the fund may invest. The Lipper Income Funds Index includes some of the largest funds that disclose investment objectives and/or strategies that are reasonably comparable to the fund’s income objective and/or strategies. Past investment results (before and after taxes) are not predictive of future investment results. Updated information on the fund’s investment results can be obtained by visiting americanfunds.com.

Performance Information Illustrates Variability of Returns [Text] rr_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 different broad measures of market results.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The Barclays U.S. Aggregate Index is a gauge of the U.S. investment-grade bond market and reflects a portion of the fixed-income securities in which the fund may invest. The Lipper Income Funds Index includes some of the largest funds that disclose investment objectives and/or strategies that are reasonably comparable to the fund's income objective and/or strategies.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) 325-3590
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress americanfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past investment results (before and after taxes) are not predictive of future investment results.
Bar Chart [Heading] rr_BarChartHeading Calendar year total returns for Class A shares (Results do not include a sales charge; if a sales charge were included, results would be lower.)
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads (Results do not include a sales charge; if a sales charge were included, results would be lower.)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest/Lowest quarterly results during this period were:


Highest 14.13% (quarter ended September 30, 2009)


Lowest -15.43% (quarter ended December 31, 2008)


The fund's total return for the six months ended June 30, 2013, was 7.31%.

Year to Date Return, Label rr_YearToDateReturnLabel total return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2013
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 7.31%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.13%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (15.43%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)
Performance Table Uses Highest Federal Rate rr_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 rr_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] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Class A shares; after-tax returns for other share classes will vary.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Class A annualized 30-day yield at July 31, 2013: 2.81%
(For current yield information, please call American FundsLine® at (800) 325-3590.)


After-tax returns are shown only for Class A 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.

Money Market Seven Day Yield Phone rr_MoneyMarketSevenDayYieldPhone (800) 325-3590
S&P 500 (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel S&P 500 (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 15.99%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.66%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.10%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 10.51%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 01, 1973
Barclays U.S. Aggregate Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Barclays U.S. Aggregate Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.21%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 5.95%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.18%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 01, 1973
Lipper Income Funds Index (reflects no deductions for sales charges, account fees or U.S. federal income taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Lipper Income Funds Index (reflects no deductions for sales charges, account fees or U.S. federal income taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 10.00%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.62%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 6.05%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 01, 1973
Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1]
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.24%
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.58%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock A contingent deferred sales charge of 1.00% applies on certain redemptions within one year following purchases of $1 million or more made without an initial sales charge.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 631
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 750
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 880
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,259
Annual Return 2003 rr_AnnualReturn2003 25.27%
Annual Return 2004 rr_AnnualReturn2004 12.92%
Annual Return 2005 rr_AnnualReturn2005 3.41%
Annual Return 2006 rr_AnnualReturn2006 20.29%
Annual Return 2007 rr_AnnualReturn2007 3.77%
Annual Return 2008 rr_AnnualReturn2008 (28.85%)
Annual Return 2009 rr_AnnualReturn2009 24.51%
Annual Return 2010 rr_AnnualReturn2010 11.97%
Annual Return 2011 rr_AnnualReturn2011 5.58%
Annual Return 2012 rr_AnnualReturn2012 11.96%
Label rr_AverageAnnualReturnLabel A Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 5.53%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.02%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.27%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 11.10%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 01, 1973
Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel A After taxes on distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.73%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.02%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 6.07%
Class A | After Taxes on Distributions and Sale of Fund Shares
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel A After taxes on distributions and sale of fund shares
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.16%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.31%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.88%
Class B
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 5.00%
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 1.33%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 635
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 821
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 929
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,395
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 135
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 421
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 729
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,395
Label rr_AverageAnnualReturnLabel B Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.10%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.10%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.25%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.81%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 15, 2000
Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 1.38%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 240
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 437
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 755
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,657
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 140
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 437
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 755
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,657
Label rr_AverageAnnualReturnLabel C Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 10.07%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.40%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.03%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 5.89%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 15, 2001
Class F-1
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.17%
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
Label rr_AverageAnnualReturnLabel F-1 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.92%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.20%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.85%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.58%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 15, 2001
Class F-2
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 0.41%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 42
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 132
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 230
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 518
Label rr_AverageAnnualReturnLabel F-2 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 12.17%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.46%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Aug. 01, 2008
Class 529-A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1]
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Maximum annual account fee (529 share classes only) rr_MaximumAccountFee 10
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.22%
Other expenses rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 0.68%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock A contingent deferred sales charge of 1.00% applies on certain redemptions within one year following purchases of $1 million or more made without an initial sales charge.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 660
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 819
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 991
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,478
Label rr_AverageAnnualReturnLabel 529-A Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 5.39%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.93%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.18%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.17%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Feb. 15, 2002
Class 529-B
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 5.00%
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Maximum annual account fee (529 share classes only) rr_MaximumAccountFee 10
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.99%
Other expenses rr_OtherExpensesOverAssets 0.24%
Total annual fund operating expenses rr_ExpensesOverAssets 1.46%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 668
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 901
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,055
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,636
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 168
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 501
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 855
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,636
Label rr_AverageAnnualReturnLabel 529-B Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 5.98%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.98%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.10%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.18%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Feb. 19, 2002
Class 529-C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Maximum annual account fee (529 share classes only) rr_MaximumAccountFee 10
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.22%
Total annual fund operating expenses rr_ExpensesOverAssets 1.45%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 267
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 497
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 849
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,835
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 167
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 497
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 849
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,835
Label rr_AverageAnnualReturnLabel 529-C Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 9.99%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.33%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 6.95%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 5.97%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Feb. 19, 2002
Class 529-E
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Maximum annual account fee (529 share classes only) rr_MaximumAccountFee 10
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 114
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 333
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 568
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,235
Label rr_AverageAnnualReturnLabel 529-E Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.56%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.87%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.50%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.41%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2002
Class 529-F-1
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Maximum annual account fee (529 share classes only) rr_MaximumAccountFee 10
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.22%
Total annual fund operating expenses rr_ExpensesOverAssets 0.45%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 66
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 184
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 311
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 674
Label rr_AverageAnnualReturnLabel 529-F-1 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 12.11%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.37%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.96%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 8.04%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Sep. 17, 2002
Class R-1
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.16%
Total annual fund operating expenses rr_ExpensesOverAssets 1.39%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 142
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 440
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 761
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,669
Label rr_AverageAnnualReturnLabel R-1 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.06%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.39%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.01%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 5.99%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jun. 17, 2002
Class R-2
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.74%
Other expenses rr_OtherExpensesOverAssets 0.39%
Total annual fund operating expenses rr_ExpensesOverAssets 1.36%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 138
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 431
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 745
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,635
Label rr_AverageAnnualReturnLabel R-2 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.05%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.35%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 6.97%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 5.67%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate May 31, 2002
Class R-3
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.21%
Total annual fund operating expenses rr_ExpensesOverAssets 0.94%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 96
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 300
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 520
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,155
Label rr_AverageAnnualReturnLabel R-3 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.58%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.85%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.49%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.29%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jun. 04, 2002
Class R-4
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.16%
Total annual fund operating expenses 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
Label rr_AverageAnnualReturnLabel R-4 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.90%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.17%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.82%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 7.08%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jun. 27, 2002
Class R-5
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.11%
Total annual fund operating expenses rr_ExpensesOverAssets 0.34%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 35
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 109
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 191
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 431
Label rr_AverageAnnualReturnLabel R-5 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 12.22%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.48%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.14%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.77%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate May 15, 2002
Class R-6
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.23%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.06%
Total annual fund operating expenses rr_ExpensesOverAssets 0.29%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 30
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 93
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 163
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 368
Label rr_AverageAnnualReturnLabel R-6 Before taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 12.27%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 15.72%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2009
[1] A contingent deferred sales charge of 1.00% applies on certain redemptions within one year following purchases of $1 million or more made without an initial sales charge.