v3.25.2
S000086827 [Member] N-1A Cover
Mar. 31, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name COLUMBIA ETF TRUST I
Entity Central Index Key 0001551950
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2025
Prospectus Date Aug. 01, 2025