v3.25.2
Expense Example - INCOME FUND OF AMERICA
Sep. 30, 2025
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 629
Expense Example, with Redemption, 3 Years 744
Expense Example, with Redemption, 5 Years 870
Expense Example, with Redemption, 10 Years 1,236
Class 529-A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 408
Expense Example, with Redemption, 3 Years 532
Expense Example, with Redemption, 5 Years 668
Expense Example, with Redemption, 10 Years 1,062
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 233
Expense Example, with Redemption, 3 Years 415
Expense Example, with Redemption, 5 Years 718
Expense Example, with Redemption, 10 Years 1,372
Class 529-C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 237
Expense Example, with Redemption, 3 Years 428
Expense Example, with Redemption, 5 Years 739
Expense Example, with Redemption, 10 Years 1,133
Class 529-E  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 85
Expense Example, with Redemption, 3 Years 265
Expense Example, with Redemption, 5 Years 460
Expense Example, with Redemption, 10 Years 1,025
Class 529-T  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 311
Expense Example, with Redemption, 3 Years 440
Expense Example, with Redemption, 5 Years 582
Expense Example, with Redemption, 10 Years 993
Class T  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 306
Expense Example, with Redemption, 3 Years 425
Expense Example, with Redemption, 5 Years 555
Expense Example, with Redemption, 10 Years 934
Class F-1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 64
Expense Example, with Redemption, 3 Years 202
Expense Example, with Redemption, 5 Years 351
Expense Example, with Redemption, 10 Years 786
Class 529-F-1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 69
Expense Example, with Redemption, 3 Years 218
Expense Example, with Redemption, 5 Years 379
Expense Example, with Redemption, 10 Years 847
Class F-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 38
Expense Example, with Redemption, 3 Years 119
Expense Example, with Redemption, 5 Years 208
Expense Example, with Redemption, 10 Years 468
Class F-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 27
Expense Example, with Redemption, 3 Years 84
Expense Example, with Redemption, 5 Years 146
Expense Example, with Redemption, 10 Years 331
Class 529-F-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 35
Expense Example, with Redemption, 3 Years 109
Expense Example, with Redemption, 5 Years 191
Expense Example, with Redemption, 10 Years 431
Class 529-F-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 32
Expense Example, with Redemption, 3 Years 100
Expense Example, with Redemption, 5 Years 174
Expense Example, with Redemption, 10 Years 393
Class R-1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 136
Expense Example, with Redemption, 3 Years 425
Expense Example, with Redemption, 5 Years 734
Expense Example, with Redemption, 10 Years 1,613
Class R-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 137
Expense Example, with Redemption, 3 Years 428
Expense Example, with Redemption, 5 Years 739
Expense Example, with Redemption, 10 Years 1,624
Class R-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 287
Expense Example, with Redemption, 5 Years 498
Expense Example, with Redemption, 10 Years 1,108
Class R-4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 62
Expense Example, with Redemption, 3 Years 195
Expense Example, with Redemption, 5 Years 340
Expense Example, with Redemption, 10 Years 762
Class R-5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 97
Expense Example, with Redemption, 5 Years 169
Expense Example, with Redemption, 10 Years 381
Class R-6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 27
Expense Example, with Redemption, 3 Years 84
Expense Example, with Redemption, 5 Years 146
Expense Example, with Redemption, 10 Years 331
Class R-2E  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 108
Expense Example, with Redemption, 3 Years 337
Expense Example, with Redemption, 5 Years 585
Expense Example, with Redemption, 10 Years 1,294
Class R-5E  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 42
Expense Example, with Redemption, 3 Years 132
Expense Example, with Redemption, 5 Years 230
Expense Example, with Redemption, 10 Years $ 518