v3.26.1
Form N-1A Cover
Apr. 09, 2026
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name First Trust Exchange-Traded Fund
Entity Central Index Key 0001329377
Entity Investment Company Type N-1A
Document Period End Date Apr. 09, 2026
Prospectus Date Jun. 10, 2026