v3.25.3
Form N-1A Cover
1 Months Ended
Nov. 24, 2025
Dec. 31, 2025
Prospectus [Line Items]    
Document Type 485BPOS  
Amendment Flag false  
Registrant Name Founder Funds Trust  
Entity Central Index Key 0002077057  
Entity Investment Company Type N-1A  
Document Period End Date Nov. 24, 2025  
Prospectus Date   Dec. 02, 2025