v3.25.2
Form N-1A Cover
Sep. 30, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name THE INCOME FUND OF AMERICA
Entity Central Index Key 0000050013
Entity Investment Company Type N-1A
Document Period End Date Sep. 30, 2025
Prospectus Date Oct. 01, 2025