v3.25.2
Expense Example - AMERICAN FUNDS SHORT-TERM TAX-EXEMPT BOND FUND
Sep. 30, 2025
USD ($)
AMERICAN FUNDS SHORT-TERM TAX-EXEMPT BOND FUND (Class A, Class F-1, Class F-2, Class F-3, Class T) | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 293
Expense Example, with Redemption, 3 Years 387
Expense Example, with Redemption, 5 Years 489
Expense Example, with Redemption, 10 Years 790
AMERICAN FUNDS SHORT-TERM TAX-EXEMPT BOND FUND (Class A, Class F-1, Class F-2, Class F-3, Class T) | Class T  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 303
Expense Example, with Redemption, 3 Years 418
Expense Example, with Redemption, 5 Years 543
Expense Example, with Redemption, 10 Years 909
AMERICAN FUNDS SHORT-TERM TAX-EXEMPT BOND FUND (Class A, Class F-1, Class F-2, Class F-3, Class T) | Class F-1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 63
Expense Example, with Redemption, 3 Years 201
Expense Example, with Redemption, 5 Years 350
Expense Example, with Redemption, 10 Years 785
AMERICAN FUNDS SHORT-TERM TAX-EXEMPT BOND FUND (Class A, Class F-1, Class F-2, Class F-3, Class T) | Class F-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 32
Expense Example, with Redemption, 3 Years 102
Expense Example, with Redemption, 5 Years 179
Expense Example, with Redemption, 10 Years 405
AMERICAN FUNDS SHORT-TERM TAX-EXEMPT BOND FUND (Class A, Class F-1, Class F-2, Class F-3, Class T) | Class F-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 25
Expense Example, with Redemption, 3 Years 79
Expense Example, with Redemption, 5 Years 140
Expense Example, with Redemption, 10 Years 317
AMERICAN FUNDS SHORT-TERM TAX-EXEMPT BOND FUND (Class R-6) | Class R-6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 25
Expense Example, with Redemption, 3 Years 79
Expense Example, with Redemption, 5 Years 140
Expense Example, with Redemption, 10 Years $ 317