v3.25.2
Form N-1A Cover
Nov. 30, 2024
Prospectus [Line Items]  
Document Type 497
Amendment Flag false
Registrant Name MFS SERIES TRUST II
Entity Central Index Key 0000798250
Entity Investment Company Type N-1A
Document Period End Date Nov. 30, 2024
Prospectus Date Mar. 28, 2025