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Label Element Value
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund®  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading American Funds Mortgage Fund®
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

2. The “Annual fund operating expenses” table and information under the heading “Example” in the “Fees and expenses of the fund” section of the summary and statutory prospectus for AFMF is amended to read as follows. Except as indicated below, footnotes in the prospectus remain unchanged.
Expenses Restated to Reflect Current [Text] oef_ExpensesRestatedToReflectCurrent Restated to reflect current fees.
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. The example reflects the fee waiver described above through the expiration date of such waiver and total annual fund operating expenses thereafter. 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:
Expense Example Closing [Text Block] oef_ExpenseExampleClosingTextBlock

Keep this supplement with your summary and statutory prospectuses.
Supplement to Prospectus [Text Block] oef_SupplementToProspectusTextBlock

Prospectus Supplement

 

March 1, 2026  

 

For the most recent summary and statutory prospectuses of the following funds:

American Funds Mortgage Fund® (AFMF)
American High-Income Trust® (AHIT)

 

  

Intermediate Bond Fund of America® (IBFA)

U.S. Government Securities Fund® (GVT)

 
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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 $ 442
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 584
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 739
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,190
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class 529-F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.16%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.38%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 140
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 437
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 755
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,657
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 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
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.20%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.92%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 293
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 509
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,131
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-4  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.62%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.62%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 63
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 199
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 346
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 774
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-5  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.10%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.32%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.32%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 33
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 103
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 180
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 406
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-6  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 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
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.43%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 246
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 452
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 782
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,509
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 146
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 452
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 782
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,509
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.62%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 63
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 199
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 346
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 774
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class 529-A  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.22%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.25%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.69%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 418
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 563
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 721
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,178
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class 529-C  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.26%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.48%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 251
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 468
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 808
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,265
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 151
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 468
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 808
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,265
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class 529-E  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.49%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 293
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 509
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,131
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-2E  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.60%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.27%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.09%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.01%)
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 1.08%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 110
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 346
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 600
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,328
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class R-5E  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.24%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.46%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.04%)
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.42%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 43
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 144
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 254
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 575
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class 529-T  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.25%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.72%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 322
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 474
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 641
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,122
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class T  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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 $ 318
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 462
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 619
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,075
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class 529-F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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
AMERICAN FUNDS MORTGAGE FUND | American Funds Mortgage Fund® | Class 529-F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.22% [1]
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
[1] Restated to reflect current fees.