v3.25.3
Form N-1A Cover
Oct. 30, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name First Trust Exchange-Traded Fund II
Entity Central Index Key 0001364608
Entity Investment Company Type N-1A
Document Period End Date Oct. 30, 2025
Prospectus Date Oct. 31, 2025