v3.26.1
S000080645 [Member] N-1A Cover
Jul. 31, 2025
Prospectus [Line Items]  
Document Type 497
Amendment Flag false
Registrant Name BlackRock ETF Trust II
Entity Central Index Key 0001804196
Entity Investment Company Type N-1A
Document Period End Date Jul. 31, 2025
Prospectus Date Oct. 01, 2025