Annual Total Returns |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| American Century ETF Trust | American Century Mid Cap Growth Insights ETF Series | American Century Mid Cap Growth Insights ETF Class | ||||
| Prospectus [Line Items] | ||||
| Annual Return [Percent] | 19.40% | 22.22% | (27.36%) | 10.36% |