v3.26.1
John Hancock Disciplined Value Mid Cap Fund N-1A Cover
Mar. 31, 2026
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name JOHN HANCOCK FUNDS III
Entity Central Index Key 0001329954
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2026
Prospectus Date Aug. 01, 2026