v3.25.3
Form N-1A Cover
Nov. 28, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name AMERICAN FUNDS U.S. GOVERNMENT MONEY MARKET FUND
Entity Central Index Key 0001454975
Entity Investment Company Type N-1A
Document Period End Date Nov. 28, 2025
Prospectus Date Dec. 01, 2025