v3.26.1
Form N-1A Cover
Mar. 01, 2026
Prospectus [Line Items]  
Document Type 497
Amendment Flag false
Registrant Name AMERICAN CENTURY MUTUAL FUNDS, INC.
Entity Central Index Key 0000100334
Entity Investment Company Type N-1A
Document Period End Date Aug. 26, 2026
Prospectus Date Mar. 01, 2026