v3.26.1
FT Energy Income Partners Enhanced Income ETF N-1A Cover
Nov. 30, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name First Trust Exchange-Traded Fund VIII
Entity Central Index Key 0001667919
Entity Investment Company Type N-1A
Document Period End Date Nov. 30, 2025
Prospectus Date Apr. 01, 2026