v3.26.3
JPMorgan Mid Cap Value Fund N-1A Cover
Jun. 30, 2026
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name J.P. Morgan Fleming Mutual Fund Group, Inc.
Entity Central Index Key 0001037897
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Prospectus Date Nov. 01, 2026