v3.26.1
Form N-1A Cover
Apr. 04, 2025
Prospectus [Line Items]  
Document Type 497
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. 04, 2025
Prospectus Date Apr. 01, 2026