v3.25.2
Investment Objectives and Goals - American Century ETF Trust
Aug. 05, 2025
American Century Small Cap Growth Insights ETF  
Prospectus [Line Items]  
Risk/Return [Heading] American Century® Small Cap Growth Insights ETF
Objective [Heading] Investment Objective
Objective, Primary [Text Block] The fund seeks long-term capital growth.
American Century Small Cap Value Insights ETF  
Prospectus [Line Items]  
Risk/Return [Heading] American Century® Small Cap Value Insights ETF
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The fund seeks long-term capital growth.