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Performance Management - INCOME FUND OF AMERICA
Jul. 31, 2024
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Investment results
Performance Narrative [Text Block]

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 other applicable measures of market results. 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 Past Does Not Indicate Future [Text] Past investment results (before and after taxes) are not predictive of future investment results.
Performance Information Illustrates Variability of Returns [Text] 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 other applicable measures of market results.
Bar Chart Narrative [Text Block]

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 other applicable measures of market results.
Bar Chart Does Not Reflect Sales Loads [Text] Class F-2 shares are not subject to sales charges.
Bar Chart [Heading] Calendar year total returns for Class F-2 shares (Class F-2 shares are not subject to sales charges.)
Bar Chart [Table]

Bar Chart Closing [Text Block]

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, 2024, was 4.43%.

 
Year to Date Return, Label [Optional Text] The fund's total return for the six months ended
Bar Chart, Year to Date Return 4.43%
Bar Chart, Year to Date Return, Date Jun. 30, 2024
Highest Quarterly Return, Label [Optional Text] Highest
Highest Quarterly Return 10.33%
Highest Quarterly Return, Date Dec. 31, 2022
Lowest Quarterly Return, Label [Optional Text] Lowest
Lowest Quarterly Return (16.16%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Market Index Changed Effective July 24, 2024, the fund’s primary benchmark changed from the 65%/35% S&P 500 Index/Bloomberg U.S. Aggregate Index (the “Previous Primary Benchmark”) to the S&P 500 Index, a broad-based index that represents the overall securities markets, as required by the U.S. Securities and Exchange Commission (“SEC”). The Previous Primary Benchmark provides a means to compare the fund’s results to a benchmark that the investment adviser believes is more representative of the fund’s investment universe. There is no change in the fund’s investment strategies as a result of the benchmark change.
Performance Table Uses Highest Federal Rate 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 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]
           
Average annual total returns For the periods ended December 31, 2023:
Share class Inception date 1 year 5 years 10 years Lifetime
F-2 − Before taxes 8/1/2008 7.78% 8.30% 6.68% 7.34%
− After taxes on distributions   6.50 6.75 5.23 N/A
− After taxes on distributions and sale of fund shares 5.00 6.24 5.00 N/A
           
Share classes (before taxes) Inception date 1 year 5 years 10 years Lifetime
A (with maximum sales charge) 12/1/1973 1.40% 6.81% 5.85% 10.30%
C 3/15/2001 5.81 7.28 5.82 6.74
F-1 3/15/2001 7.54 8.01 6.40 6.98
F-3 1/27/2017 7.89 8.41 N/A 6.92
529-A (with maximum sales charge) 2/15/2002 3.80 7.26 6.03 6.91
529-C 2/19/2002 5.74 7.23 6.00 6.93
529-E 2/25/2002 7.30 7.79 6.16 6.79
529-F-1 9/17/2002 7.71 8.24 6.63 7.84
529-F-2 10/30/2020 7.83 N/A N/A 9.25
529-F-3 10/30/2020 7.87 N/A N/A 9.29
R-1 6/17/2002 6.75 7.25 5.64 6.32
R-2 5/31/2002 6.77 7.24 5.63 6.17
R-2E 8/29/2014 7.04 7.54 N/A 5.56
R-3 6/4/2002 7.22 7.71 6.10 6.71
R-4 6/27/2002 7.57 8.04 6.42 7.26
R-5E 11/20/2015 7.78 8.25 N/A 7.16
R-5 5/15/2002 7.87 8.36 6.74 7.27
R-6 5/1/2009 7.92 8.41 6.79 9.74
         
Indexes* 1 year 5 years 10 years Lifetime
(from
Class F-2 inception)
S&P 500 Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) 26.29% 15.69% 12.03% 11.23%
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) 18.72 10.71 8.60 8.54
Bloomberg U.S. Aggregate Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) 5.53 1.10 1.81 2.87
Class F-2 annualized 30–day yield at July 31, 2024: 3.77%
(For current yield information, please call American Funds Service Company at (800) 421-4225 or visit capitalgroup.com.)

*  Effective July 24, 2024, the fund’s primary benchmark changed from the 65%/35% S&P 500 Index/Bloomberg U.S. Aggregate Index (the “Previous Primary Benchmark”) to the S&P 500 Index, a broad-based index that represents the overall securities markets, as required by the U.S. Securities and Exchange Commission (“SEC”). The Previous Primary Benchmark provides a means to compare the fund’s results to a benchmark that the investment adviser believes is more representative of the fund’s investment universe. There is no change in the fund’s investment strategies as a result of the benchmark change.
Average Annual Return, Caption [Optional Text] Average annual total returns For the periods ended December 31, 2023:
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown only for Class F-2 shares; after-tax returns for other share classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)
Performance Table Closing [Text Block]

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.
Thirty Day Yield Caption [Optional Text] Class F-2 annualized 30–day yield at July 31, 2024:
Thirty Day Yield Phone (800) 421-4225
Thirty Day Yield 3.77%
Performance Availability Website Address [Text] capitalgroup.com
Performance Availability Phone [Text] (800) 421-4225