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Shareholder Report
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Shareholder Report [Line Items]                                                          
Document Type     N-CSR                                                    
Amendment Flag     false                                                    
Registrant Name     AMERICAN CENTURY ETF TRUST                                                    
Entity Central Index Key     0001710607                                                    
Entity Investment Company Type     N-1A                                                    
Document Period End Date     Aug. 31, 2024                                                    
C000250325 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century California Municipal Bond ETF                                                    
Class Name     American Century California Municipal Bond ETF                                                    
Trading Symbol     CATF                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century California Municipal Bond ETF for the period of July 16, 2024 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
American Century California Municipal Bond ETF$30.27%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 3                                                    
Expense Ratio, Percent     0.27%                                                    
Net Assets $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695 $ 22,718,695
Holdings Count | holding 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83
Advisory Fees Paid, Amount     $ 6,552                                                    
Investment Company, Portfolio Turnover     5.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Portfolio at a Glance
Municipal Securities93.9%Weighted Average Life to Maturity13 years
Short-Term Investments11.7%Modified Duration6 years
Other Assets and Liabilities(5.6)%
 
 
                                                   
C000197601 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Diversified Corporate Bond ETF                                                    
Class Name     American Century Diversified Corporate Bond ETF                                                    
Trading Symbol     KORP                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Diversified Corporate Bond ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Diversified Corporate Bond ETF$300.29%
                                                   
Expenses Paid, Amount     $ 30                                                    
Expense Ratio, Percent     0.29%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Diversified Corporate Bond ETF returned 10.26% for the reporting period ended August 31, 2024.
The fund seeks to provide current income. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Intermediate Corporate Bond Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. Corporate bonds generally outperformed the broad market, as economic growth and corporate earnings remained resilient and credit spreads tightened.
Security selection was a primary driver of fund performance. The financial institutions sector was a top contributor, largely due to our selections among banks, real estate investment trusts and finance companies. Holdings among retailers and technology companies also boosted results. Our selections in the consumer noncyclical sector modestly detracted, mostly due to the food and beverage industry.
Our longer-than-index duration position also aided fund performance. This strategy proved helpful as yields declined for the period.
Sector allocation also broadly contributed to performance. An out-of-index position in high-yield corporate bonds, which outperformed investment-grade corporates for the period, was the main contributor. Additionally, an out-of-index stake in government bonds and an underweight position in the technology sector also boosted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 11, 2018 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
American Century Diversified Corporate Bond ETF10.26%1.84%2.54%1/11/18
Regulatory Index
Bloomberg U.S. Aggregate Bond7.30%-0.04%1.36%
Performance Index
Bloomberg U.S. Intermediate Corporate Bond8.95%1.71%2.63%
                                                   
Performance Inception Date                                                         Jan. 11, 2018
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213 $ 294,962,213
Holdings Count | holding 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233 233
Advisory Fees Paid, Amount     $ 690,729                                                    
Investment Company, Portfolio Turnover     198.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds92.5%
U.S. Treasury Securities1.9%
Preferred Stocks1.1%
Short-Term Investments4.1%
Other Assets and Liabilities0.4%
                                                   
C000204482 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Diversified Municipal Bond ETF                                                    
Class Name     American Century Diversified Municipal Bond ETF                                                    
Trading Symbol     TAXF                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Diversified Municipal Bond ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Diversified Municipal Bond ETF$300.29%
                                                   
Expenses Paid, Amount     $ 30                                                    
Expense Ratio, Percent     0.29%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Diversified Municipal Bond ETF returned 6.75% for the reporting period ended August 31, 2024.
The fund seeks current income that is exempt from federal income tax. The commentary below refers to the fund’s performance compared to the S&P National AMT-Free Municipal Bond Index.
Municipal bonds (munis) delivered solid gains for the 12-month period. Falling Treasury yields, moderating inflation and generally healthy demand for munis provided a positive backdrop for the asset class.
Sector allocation was a key contributor to performance, largely due to out-of-index exposure to corporate munis, retirement communities and hospital bonds. Additionally, an out-of-index stake in high-yield munis, which outperformed investment-grade munis for the period, boosted fund performance.
Our longer-than-index duration position also aided fund performance. This strategy proved helpful as yields declined for the period.
In addition, our security selection efforts lifted fund performance. Selections in the local general obligation (GO), special tax and public university sectors were top contributors. These holdings more than offset slightly negative selection effects in the public power, state GO and private university sectors.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 10, 2018 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
American Century Diversified Municipal Bond ETF6.75%1.40%2.71%9/10/18
S&P National AMT-Free Municipal Bond5.74%1.04%2.31%
                                                   
Performance Inception Date                                                       Sep. 10, 2018  
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420 $ 478,560,420
Holdings Count | holding 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689 689
Advisory Fees Paid, Amount     $ 1,168,657                                                    
Investment Company, Portfolio Turnover     25.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Portfolio at a Glance
Municipal Securities99.9%Weighted Average Life to Maturity14 years
Other Assets and Liabilities0.1%Modified Duration6 years
 
 
 
                                                   
C000228611 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Emerging Markets Bond ETF                                                    
Class Name     American Century Emerging Markets Bond ETF                                                    
Trading Symbol     AEMB                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Emerging Markets Bond ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Material Fund Change Notice [Text Block]     This report describes changes to the fund that occurred during the reporting period.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Emerging Markets Bond ETF$430.40%
                                                   
Expenses Paid, Amount     $ 43                                                    
Expense Ratio, Percent     0.40%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Emerging Markets Bond ETF returned 12.83% for the reporting period ended August 31, 2024.
The fund seeks to provide current income and capital appreciation. The commentary below refers to the fund’s performance compared to the JPMorgan EMBI Global Diversified Index.
Emerging markets (EM) bonds rallied for the 12-month period amid falling global interest rates, resilient U.S. economic growth and improving growth prospects in several EM countries. Additionally, growing expectations for the Federal Reserve to cut interest rates supported gains among EM bonds.
Our sector allocation decisions detracted from fund performance, particularly out-of-index positions in corporate securities. An underweight position versus the index in sovereign securities, particularly distressed sovereigns, also weighed on results. A position in high-yield credit default swaps, which we used to hedge the fund’s high-yield exposure, detracted from performance as high-yield securities outperformed.
Meanwhile, our security selection efforts aided performance, led by sovereign securities in the Middle East, the Asia/Pacific region and Europe. Our choices in these regions more than offset negative selection effects from sovereigns in Africa and Latin America. Our selections among quasi-sovereigns in the Asia/Pacific region and in Latin America lifted results.
The fund’s duration, which remained longer than the index’s, modestly contributed to performance in the declining rate environment.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 29, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Emerging Markets Bond ETF12.83%-2.09%6/29/21
JPMorgan EMBI Global Diversified Bond13.42%-1.15%
                                                   
Performance Inception Date                               Jun. 29, 2021                          
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366 $ 31,552,366
Holdings Count | holding 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102 102
Advisory Fees Paid, Amount     $ 120,252                                                    
Investment Company, Portfolio Turnover     109.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Sovereign Governments and Agencies72.8%
Corporate Bonds17.6%
U.S. Treasury Securities4.5%
Short-Term Investments3.9%
Other Assets and Liabilities1.2%
                                                   
Material Fund Change [Text Block]    
Fund Changes
Pursuant to a plan of liquidation adopted by the Board of Trustees, American Century Emerging Markets Bond ETF liquidated effective October 3, 2024.
                                                   
C000204442 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Focused Dynamic Growth ETF                                                    
Class Name     American Century Focused Dynamic Growth ETF                                                    
Trading Symbol     FDG                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Focused Dynamic Growth ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Focused Dynamic Growth ETF$520.45%
                                                   
Expenses Paid, Amount     $ 52                                                    
Expense Ratio, Percent     0.45%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Focused Dynamic Growth ETF returned 32.14% for the reporting period ended August 31, 2024.
The fund seeks long-term capital growth. The commentary below refers to the fund’s performance compared to the Russell 1000 Growth Index.
A risk-on environment over much of the 12-month period broadly favored large-cap stocks, particularly those related to artificial intelligence. This was despite elevated interest rates and worries about a recession that did not happen. Concerns about AI investment and slowing economic conditions led to a rotation to lower volatility and higher-quality stocks near the end of the period.
Some of the leading contributions to performance came from communication services stocks. Amid economic uncertainty, investors sought strong growth and dependable free cash flows. This explains the outperformance of Meta Platforms and Netflix. Among individual contributors, an overweight position in NVIDIA benefited from the build-out in AI.
Stock choices among health care stocks were another source of strength. The sector broadly benefited from solid earnings growth and attractive valuations. Our overweight holdings in robotic surgical device maker Intuitive Surgical and biotechnology company Regeneron Pharmaceuticals also drove strong results and stock performance through innovation and new product cycles.
Selection and allocation decisions meant the consumer staples sector detracted most from performance. Beverage companies Constellation Brands and The Boston Beer Co. lagged, citing macroeconomic headwinds to their business. The leading individual detractor was electric vehicle maker Tesla, which also suffered from weakening economic conditions and high interest rates.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
March 31, 2020 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Focused Dynamic Growth ETF32.14%19.87%3/31/20
Regulatory Index
Russell 100026.60%21.08%
Performance Index
Russell 1000 Growth30.75%23.27%
                                                   
Performance Inception Date                                               Mar. 31, 2020          
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927 $ 241,799,927
Holdings Count | holding 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41
Advisory Fees Paid, Amount     $ 908,878                                                    
Investment Company, Portfolio Turnover     45.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.7%Semiconductors and Semiconductor Equipment19%
Short-Term Investments1.1%Software14%
Other Assets and Liabilities(0.8)%Biotechnology11%
 Interactive Media and Services10%
 Broadline Retail9%
                                                   
C000204443 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Focused Large Cap Value ETF                                                    
Class Name     American Century Focused Large Cap Value ETF                                                    
Trading Symbol     FLV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Focused Large Cap Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Focused Large Cap Value ETF$460.42%
                                                   
Expenses Paid, Amount     $ 46                                                    
Expense Ratio, Percent     0.42%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Focused Large Cap Value ETF returned 20.29% for the reporting period ended August 31, 2024.
The fund seeks long-term capital growth. The commentary below refers to the fund’s performance compared to the Russell 1000 Value Index.
A risk-on environment over much of the period broadly favored large-cap stocks, particularly those related to artificial intelligence. This occurred despite elevated interest rates and worries about a recession that did not happen. Concerns about AI investment and slowing economic conditions led to a rotation toward lower volatility and higher-quality stocks near the end of the period.
Allocation in the health care sector weighed on performance. The fund is overweight health care, particularly in industries like health care equipment and supplies that have been beset by investors’ concerns about new weight-loss drugs. These treatments have been a drag on some medical device companies’ share prices. We believe this is a transitory issue and utilization should normalize.
Choices of investments in the industrials sector also curbed performance. While the fund is broadly underweight in the sector, an overweight holding in the air freight and logistics industry—specifically, United Parcel Service—detracted from relative results. Underweight positions in the electrical equipment and machinery industries also slowed performance.
Allocation among names in the energy sector contributed to the fund’s performance. Falling oil prices generally pressured stocks in the oil, gas and consumable fuels industry, so the fund’s underweight position and allocation among names in the industry helped results. Not owning names in the energy equipment and services industry also aided relative performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
March 31, 2020 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Focused Large Cap Value ETF20.29%16.88%3/31/20
Regulatory Index
Russell 100026.60%21.08%
Performance Index
Russell 1000 Value21.15%18.07%
                                                   
Performance Inception Date                                               Mar. 31, 2020          
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762 $ 236,966,762
Holdings Count | holding 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42
Advisory Fees Paid, Amount     $ 903,110                                                    
Investment Company, Portfolio Turnover     30.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks98.2%Health Care Equipment and Supplies10%
Short-Term Investments2.9%Pharmaceuticals9%
Other Assets and Liabilities(1.1)%Oil, Gas and Consumable Fuels7%
 Banks6%
 Personal Care Products6%
                                                   
C000222947 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Low Volatility ETF                                                    
Class Name     American Century Low Volatility ETF                                                    
Trading Symbol     LVOL                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Low Volatility ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Low Volatility ETF$320.29%
                                                   
Expenses Paid, Amount     $ 32                                                    
Expense Ratio, Percent     0.29%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Low Volatility ETF returned 20.05% for the reporting period ended August 31, 2024.
The fund seeks capital appreciation. The commentary below refers to the fund’s performance compared to the S&P 500 Index.
Lower-volatility equities have historically done well relative to the broader market when stocks fall, but lag when they rally. Stocks performed very well during the fiscal year, repeatedly reaching record highs, led by the so-called Magnificent Seven mega-cap technology stocks. Consistent with managing the risk of unprecedented market concentration, we underweighted these seven names.
The relative lack of exposure to the Magnificent Seven can be seen in the list of the portfolio’s leading detractors from performance compared with the benchmark. The number-one relative detractor was NVIDIA, to which the portfolio had no exposure. Other notable relative detractors were underweight positions in Meta Platforms (parent of Facebook) and Microsoft.
Some of the key contributions to relative results came from industrials and materials stocks, which benefited from fading recession fears and hopes for an economic soft landing. Returning to the Magnificent Seven, having no exposure to electric vehicle maker Tesla significantly benefited relative results. The stock performed very well in 2023 but gave back some of those gains in 2024.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 12, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Low Volatility ETF20.05%10.19%1/12/21
S&P 50027.14%13.23%
                                                   
Performance Inception Date                                       Jan. 12, 2021                  
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610 $ 12,949,610
Holdings Count | holding 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100
Advisory Fees Paid, Amount     $ 33,150                                                    
Investment Company, Portfolio Turnover     53.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.4%Software11%
Short-Term Investments0.5%Financial Services8%
Other Assets and Liabilities0.1%Technology Hardware, Storage and Peripherals7%
 IT Services6%
 Insurance6%
                                                   
C000218645 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Mid Cap Growth Impact ETF                                                    
Class Name     American Century Mid Cap Growth Impact ETF                                                    
Trading Symbol     MID                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Mid Cap Growth Impact ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Mid Cap Growth Impact ETF$510.45%
                                                   
Expenses Paid, Amount     $ 51                                                    
Expense Ratio, Percent     0.45%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Mid Cap Growth Impact ETF returned 26.29% for the reporting period ended August 31, 2024.
This fund seeks long-term capital growth. The commentary below refers to the fund’s performance compared to the Russell Midcap Growth Index.
A risk-on environment over much of the 12-month period broadly favored large-cap stocks, particularly those related to artificial intelligence. This was despite elevated interest rates and worries about a recession that did not happen. Concerns about AI investment and slowing economic conditions led to a rotation to lower volatility and higher-quality stocks near the end of the period.
Stock picks in the industrials sector contributed to the fund’s performance during the 12-month period. Investment in Vertiv Holdings helped drive outperformance as the company, which provides electrical cooling infrastructure equipment, benefited from enthusiasm for AI. Strategic selections in the building products industry also gave results a lift.
Choices of investments in the health care sector contributed to performance. In particular, the biotechnology industry, led by an overweight position in Viking Therapeutics, helped relative results. Shares in Viking advanced on encouraging data for its weight-loss drug. In addition, avoiding certain names in the health care technology and pharmaceuticals industries proved fortuitous.
Security selection in the financials sector slowed results. The fund is broadly underweight in the sector and allocation among names in the financial services and banking industries curbed performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
July 13, 2020 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Mid Cap Growth Impact ETF26.29%11.08%7/13/20
Regulatory Index
Russell 300026.14%16.24%
Performance Index
Russell Midcap Growth19.07%9.77%
                                                   
Performance Inception Date                                             Jul. 13, 2020            
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677 $ 70,328,677
Holdings Count | holding 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39
Advisory Fees Paid, Amount     $ 262,180                                                    
Investment Company, Portfolio Turnover     68.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks97.5%Chemicals9%
Short-Term Investments2.5%Diversified Consumer Services8%
Other Assets and Liabilities0.0%Semiconductors and Semiconductor Equipment7%
 Health Care Equipment and Supplies6%
 Software6%
                                                   
C000241171 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Multisector Floating Income ETF                                                    
Class Name     American Century Multisector Floating Income ETF                                                    
Trading Symbol     FUSI                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Multisector Floating Income ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Multisector Floating Income ETF$280.27%
                                                   
Expenses Paid, Amount     $ 28                                                    
Expense Ratio, Percent     0.27%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Multisector Floating Income ETF returned 6.99% for the reporting period ended August 31, 2024.
The fund seeks income. As a secondary objective, the fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. 1-3 Month Treasury Bill Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. Credit-sensitive securities generally outperformed government securities for the period. Against this backdrop, our out-of-index allocation to the securitized sector aided performance.
Our collateralized loan obligations, non-agency commercial mortgage-backed securities and non-agency collateralized mortgage obligations (CMOs) were top contributors. Exposure to asset-backed securities and agency CMOs also aided performance, but to a smaller degree.
An underweight position versus the index in government securities modestly detracted from performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
March 14, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Multisector Floating Income ETF6.99%7.20%3/14/23
Regulatory Index
Bloomberg U.S. Aggregate Bond7.30%4.76%
Performance Index
Bloomberg U.S. 1-3 Month Treasury Bill5.54%5.38%
                                                   
Performance Inception Date           Mar. 14, 2023                                              
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039 $ 58,512,039
Holdings Count | holding 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126
Advisory Fees Paid, Amount     $ 79,367                                                    
Investment Company, Portfolio Turnover     98.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Collateralized Loan Obligations36.4%
Asset-Backed Securities18.5%
Commercial Mortgage-Backed Securities15.4%
Collateralized Mortgage Obligations9.0%
U.S. Treasury Securities6.6%
Short-Term Investments13.7%
Other Assets and Liabilities0.4%
 
                                                   
C000228610 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Multisector Income ETF                                                    
Class Name     American Century Multisector Income ETF                                                    
Trading Symbol     MUSI                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Multisector Income ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Multisector Income ETF$380.36%
                                                   
Expenses Paid, Amount     $ 38                                                    
Expense Ratio, Percent     0.36%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Multisector Income ETF returned 10.44% for the reporting period ended August 31, 2024.
The fund seeks to provide a high level of current income and total return. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Aggregate Bond Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. Credit-sensitive securities generally outperformed government securities for the period. Against this backdrop, our sector allocations broadly aided performance.
An overweight position versus the index in investment-grade credit, which outperformed the broader U.S. bond market, was a top contributor to performance. Additionally, an out-of-index position in high-yield credit, which outperformed investment-grade credit, further boosted results.
Our overweight position in the securitized sector also was a main contributor to performance. Our focus on credit-sensitive subsectors, including asset-backed securities, non-agency collateralized mortgage obligations, non-agency commercial mortgage-backed securities and collateralized loan obligations, drove the sector’s results.
Our allocation to emerging markets debt and an underweight in U.S. government securities also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 29, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Multisector Income ETF10.44%0.70%6/29/21
Bloomberg U.S. Aggregate Bond7.30%-1.68%
                                                   
Performance Inception Date                               Jun. 29, 2021                          
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724 $ 188,555,724
Holdings Count | holding 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367 367
Advisory Fees Paid, Amount     $ 633,521                                                    
Investment Company, Portfolio Turnover     147.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds50.3%
U.S. Government Agency Mortgage-Backed Securities11.9%
Preferred Stocks10.4%
Collateralized Mortgage Obligations5.6%
U.S. Treasury Securities5.4%
Collateralized Loan Obligations5.3%
Asset-Backed Securities4.9%
Commercial Mortgage-Backed Securities3.1%
Bank Loan Obligations1.0%
Sovereign Governments and Agencies0.3%
Short-Term Investments3.6%
Other Assets and Liabilities(1.8)%
 
                                                   
C000222948 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Quality Convertible Securities ETF                                                    
Class Name     American Century Quality Convertible Securities ETF                                                    
Trading Symbol     QCON                                                    
Security Exchange Name     CboeBZX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Quality Convertible Securities ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Quality Convertible Securities ETF$340.32%
                                                   
Expenses Paid, Amount     $ 34                                                    
Expense Ratio, Percent     0.32%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Quality Convertible Securities ETF returned 11.37% for the reporting period ended August 31, 2024.
This fund seeks total return. The commentary below refers to the fund’s performance compared to the ICE BofA Convertible Index.
Convertible securities gained during the 12-month period. Interest rates increased and remained elevated to combat inflation, which gradually declined. Equities markets were generally strong during the period, due largely to enthusiasm for artificial intelligence. Concerns about the sturdiness of the U.S. economy led to a rotation into lower-volatility securities later in the period.
The fund’s higher positive delta — an estimate of how much the price changes for a derivative based on price movements for the underlying security — relative to the index throughout the 12-month period was the main contributor to the fund’s performance.
The fund’s focus on what we believe are higher-quality issuers added value and contributed to the fund’s performance throughout the period.
The fund’s lower duration relative to the index aided relative performance, particularly during the first eight months of the period when rates were rising.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
February 16, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Quality Convertible Securities ETF11.37%-1.08%2/16/21
Regulatory Index
Russell 300026.14%10.48%
Performance Index
ICE BofA Convertible9.57%-1.98%
The regulatory index is provided as a broad measure of market performance. The performance index is provided because the advisor believes it is more reflective of the fund’s investment strategy.
                                                   
Performance Inception Date                                     Feb. 16, 2021                    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082 $ 43,426,082
Holdings Count | holding 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115
Advisory Fees Paid, Amount     $ 120,033                                                    
Investment Company, Portfolio Turnover     63.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Convertible Bonds88.4%Software15%
Convertible Preferred Stocks10.2%Health Care Equipment and Supplies9%
Short-Term Investments3.1%Electric Utilities9%
Other Assets and Liabilities(1.7)%Hotels, Restaurants and Leisure8%
 Banks5%
                                                   
C000202058 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Quality Diversified International ETF                                                    
Class Name     American Century Quality Diversified International ETF                                                    
Trading Symbol     QINT                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Quality Diversified International ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Quality Diversified International ETF$430.39%
                                                   
Expenses Paid, Amount     $ 43                                                    
Expense Ratio, Percent     0.39%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Quality Diversified International ETF returned 20.91% for the reporting period ended August 31, 2024.
The commentary below refers to the fund’s performance compared to the MSCI World ex USA Index.
Global stocks in developed markets outside the U.S. broadly advanced during the 12-month period. Enthusiasm for artificial intelligence helped propel global equities in the information technology sector. At the same time, stocks for health care companies involved in the development of new and promising pharmaceutical treatments to effectively treat obesity also gained.
Strategic stock selections in the consumer staples sector contributed to the fund’s performance. The fund is underweight in the food products industry, which was under pressure during the period, and avoiding exposure to Nestle helped drive results.
Information technology benefited from significant investments in AI, so the fund’s overweight position, combined with security selection in the sector, also contributed to performance. The semiconductors industry is a prime beneficiary of AI, so our overweight and stock picks in the space gave results a boost.
Holdings in the materials sector slowed performance. The fund is overweight in materials and security selection in the sector dampened results. Stock picks in the metals and mining industry weighed on performance as an overweight position in Fortescue was a key detractor during the period.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 10, 2018 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
American Century Quality Diversified International ETF20.91%9.49%7.08%9/10/18
MSCI World ex USA19.45%8.72%7.17%
American Century Quality Diversified International Equity20.87%N/AN/A
                                                   
Performance Inception Date                                                       Sep. 10, 2018  
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243 $ 213,795,243
Holdings Count | holding 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385 385
Advisory Fees Paid, Amount     $ 857,536                                                    
Investment Company, Portfolio Turnover     78.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.3%Japan20%
Warrants0.0%United Kingdom12%
Short-Term Investments1.4%France9%
Other Assets and Liabilities(0.7)%Canada8%
 Switzerland6%
                                                   
C000222949 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Quality Preferred ETF                                                    
Class Name     American Century Quality Preferred ETF                                                    
Trading Symbol     QPFF                                                    
Security Exchange Name     CboeBZX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Quality Preferred ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Quality Preferred ETF$340.32%
                                                   
Expenses Paid, Amount     $ 34                                                    
Expense Ratio, Percent     0.32%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Quality Preferred ETF returned 11.98% for the reporting period ended August 31, 2024.
The fund seeks current income and capital appreciation. The commentary below refers to the fund’s performance compared to the ICE Exchange-Listed Preferred & Hybrid Securities Index.
Preferred securities gained during the period as bond yields fell. Inflation gradually cooled, as did economic growth during the latter half of the period. Equities were strong during the period due largely to enthusiasm for artificial intelligence. Concerns about AI investments and the sturdiness of the U.S. economy led to a rotation into lower-volatility securities later in the period.
Spreads narrowed during the 12-month period, which detracted from the fund’s relative performance. The fund’s allocation to institutional preferred securities also weighed on performance, given that exchange-traded preferred securities outperformed.
The fund’s short duration versus the index contributed to relative performance, particularly during the first eight months of the period when rates were rising.
The fund’s focus on what we believe are higher-quality issuers also gave performance a lift. Strong security selection in the utilities aided results as the sector broadly benefited from advancements in AI, which is expected to increase demand for electricity.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
February 16, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Quality Preferred ETF11.98%3.28%2/16/21
Regulatory Index
Russell 300026.14%10.48%
Performance Index
ICE Exchange-Listed Preferred & Hybrid Securities12.64%1.68%
                                                   
Performance Inception Date                                     Feb. 16, 2021                    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583 $ 80,271,583
Holdings Count | holding 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164 164
Advisory Fees Paid, Amount     $ 203,931                                                    
Investment Company, Portfolio Turnover     84.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Preferred Stocks78.8%Banks24%
Corporate Bonds10.4%Insurance16%
Convertible Preferred Stocks9.4%Capital Markets13%
Short-Term Investments12.7%Electric Utilities10%
Other Assets and Liabilities(11.3)%Consumer Finance5%
                                                   
C000231722 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Select High Yield ETF                                                    
Class Name     American Century Select High Yield ETF                                                    
Trading Symbol     AHYB                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Select High Yield ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Select High Yield ETF$470.45%
                                                   
Expenses Paid, Amount     $ 47                                                    
Expense Ratio, Percent     0.45%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Select High Yield ETF returned 10.89% for the reporting period ended August 31, 2024.
The fund seeks to provide high current income. The commentary below refers to the fund’s performance compared to the ICE BofA US High Yield Constrained (BB-B) Index.
Changing expectations for Federal Reserve (Fed) rate cuts led to Treasury market volatility during the period. But, as inflation slowly moderated and the labor market weakened, a Fed policy shift appeared imminent, and Treasury yields declined overall. High-yield earnings generally remained resilient, and high-yield bonds delivered solid gains for the period.
An underweight position versus the index in Rakuten Group, a Japan-based e-commerce company, weighed on results. The company reentered high-yield benchmarks in January and reported improvements. We remained cautious toward company management.
Exposure in the pharmaceuticals sector also detracted from results. Specifically, an underweight in specialty pharmaceutical and medical device company Bausch Health Cos., which rallied in May, weighed on performance. Uncertainties around the company’s plans to spin off its eye care business and concerns about liability management prompted our underweight.
Positioning in the support services sector aided results, largely due to our position in office supplies retailer Staples. The company extended its recovery via margin expansion and free cash flow improvements. A position in specialty chemicals company Solenis, which consistently reported strong operating performance and deleveraging progress, also boosted performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
November 16, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Select High Yield ETF10.89%2.41%11/16/21
Regulatory Index
Bloomberg U.S. Aggregate Bond7.30%-1.77%
Performance Index
ICE BofA US High Yield Constrained (BB-B)11.95%2.59%
                                                   
Performance Inception Date                         Nov. 16, 2021                                
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324 $ 34,713,324
Holdings Count | holding 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596 596
Advisory Fees Paid, Amount     $ 148,680                                                    
Investment Company, Portfolio Turnover     30.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds95.6%
Preferred Stocks0.5%
Short-Term Investments6.0%
Other Assets and Liabilities(2.1)%
 
                                                   
C000237948 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Short Duration Strategic Income ETF                                                    
Class Name     American Century Short Duration Strategic Income ETF                                                    
Trading Symbol     SDSI                                                    
Security Exchange Name     NASDAQ                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Short Duration Strategic Income ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Short Duration Strategic Income ETF$330.32%
                                                   
Expenses Paid, Amount     $ 33                                                    
Expense Ratio, Percent     0.32%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Short Duration Strategic Income ETF returned 7.98% for the reporting period ended August 31, 2024.
The fund seeks income. As a secondary objective, the fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. 1-3 Year Government/Credit Bond Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. Credit-sensitive securities generally outperformed government securities for the period. Against this backdrop, our sector allocations broadly aided performance.
An overweight position versus the index in investment-grade credit, which outperformed the broader U.S. bond market, was a top contributor to performance. Additionally, an out-of-index position in high-yield credit, which outperformed investment-grade credit, further boosted results.
Our overweight position in the securitized sector also was a main contributor to performance. Our focus on credit-sensitive subsectors, including asset-backed securities, collateralized loan obligations, non-agency commercial mortgage-backed securities and non-agency collateralized mortgage obligations drove the sector’s results.
Our allocation to emerging markets debt and an underweight in U.S. government securities also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
October 11, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Short Duration Strategic Income ETF7.98%6.86%10/11/22
Regulatory Index
Bloomberg U.S. Aggregate Bond7.30%5.94%
Performance Index
Bloomberg U.S. 1-3 Year Government/Credit Bond6.25%4.83%
                                                   
Performance Inception Date               Oct. 11, 2022                                          
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081 $ 54,126,081
Holdings Count | holding 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286 286
Advisory Fees Paid, Amount     $ 121,864                                                    
Investment Company, Portfolio Turnover     207.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds42.3%
U.S. Treasury Securities26.9%
Collateralized Mortgage Obligations8.6%
Preferred Stocks7.6%
Collateralized Loan Obligations4.3%
Asset-Backed Securities4.0%
Commercial Mortgage-Backed Securities3.7%
Bank Loan Obligations0.9%
Sovereign Governments and Agencies0.1%
Short-Term Investments0.8%
Other Assets and Liabilities0.8%
 
                                                   
C000218646 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Sustainable Equity ETF                                                    
Class Name     American Century Sustainable Equity ETF                                                    
Trading Symbol     ESGA                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Sustainable Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Material Fund Change Notice [Text Block]     This report describes changes to the fund that occurred during the reporting period.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Sustainable Equity ETF$440.39%
                                                   
Expenses Paid, Amount     $ 44                                                    
Expense Ratio, Percent     0.39%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Sustainable Equity ETF returned 24.77% for the reporting period ended August 31, 2024.
The fund seeks long-term capital growth. The commentary below refers to the fund’s performance compared to the S&P 500 Index.
A risk-on environment over much of the 12-month period broadly favored large-cap stocks, particularly those related to artificial intelligence. This was despite elevated interest rates and worries about a recession that did not happen. Concerns about AI investment and slowing economic conditions led to a rotation to lower volatility and higher-quality stocks near the end of the period.
Positioning in the health care sector contributed most to performance. These stocks benefited from solid earnings growth and attractive valuations given uncertainty about the economy. Biotechnology stocks performed well amid a surge in innovation, which saw progress on treatments for some of mankind’s most intractable diseases, including drugs for obesity, Alzheimer’s and heart disease.
Stock choices in the information technology sector detracted most from performance compared with the benchmark. While our positioning among the so-called Magnificent Seven stocks was beneficial overall, we were underweight in select communications equipment, electronic equipment and semiconductor stocks, which benefited from investor focus on AI-related technology.
Energy stocks also detracted. Oil prices fell beginning in late 2023 because of uncertainty around the pace of global economic growth. That weighed on energy producers and equipment and services companies. Elsewhere, it hurt to be underweight real estate investment trusts, which rebounded during the period as investors began to anticipate Federal Reserve interest rate cuts.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
July 13, 2020 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Sustainable Equity ETF24.77%15.58%7/13/20
S&P 50027.14%16.91%
                                                   
Performance Inception Date                                             Jul. 13, 2020            
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385 $ 263,280,385
Holdings Count | holding 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101 101
Advisory Fees Paid, Amount     $ 747,576                                                    
Investment Company, Portfolio Turnover     18.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.6%Semiconductors and Semiconductor Equipment11%
Short-Term Investments0.3%Software11%
Other Assets and Liabilities0.1%Technology Hardware, Storage and Peripherals7%
 Interactive Media and Services6%
 Capital Markets4%
                                                   
Material Fund Change [Text Block]    
Fund Changes
Effective December 10, 2024, American Century Sustainable Equity ETF will be renamed American Century Large Cap Equity ETF, and the fund’s ticker will change from ESGA to ACLC.
                                                   
C000228612 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century Sustainable Growth ETF                                                    
Class Name     American Century Sustainable Growth ETF                                                    
Trading Symbol     ESGY                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century Sustainable Growth ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Material Fund Change Notice [Text Block]     This report describes changes to the fund that occurred during the reporting period.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century Sustainable Growth ETF$450.39%
                                                   
Expenses Paid, Amount     $ 45                                                    
Expense Ratio, Percent     0.39%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century Sustainable Growth ETF returned 28.41% for the reporting period ended August 31, 2024.
The fund seeks capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 1000 Growth Index.
A risk-on environment over much of the 12-month period broadly favored large-cap stocks, particularly those related to artificial intelligence. This was despite elevated interest rates and worries about a recession that did not happen. Concerns about AI investment and slowing economic conditions led to a rotation to lower volatility and higher-quality stocks near the end of the period.
Stock picks and an underweight in the industrials sector contributed most to the fund’s performance, led by positioning among ground transportation stocks. Consumer discretionary was another source of strength. Stock selection contributed, and it helped to be underweight this lagging sector. Both sectors were vulnerable to worries about a potential economic slowdown.
Stock choices in the information technology sector detracted most from performance compared with the benchmark. While our positioning among the so-called Magnificent Seven stocks was beneficial overall, we were underweight in select semiconductor, communications equipment and electronic equipment stocks, which benefited from investor focus on AI-related technology.
Financials stocks also detracted. Our choices among financial services stocks detracted most in the sector. We favored the stocks of electronic payment networks such as Visa, Mastercard and Block (formerly Square). Unfortunately, these companies were hit by worries about the effect on their business of a potential economic slowdown.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 29, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
American Century Sustainable Growth ETF28.41%10.30%6/29/21
Regulatory Index
Russell 100026.60%9.56%
Performance Index
Russell 1000 Growth30.75%10.67%
                                                   
Performance Inception Date                               Jun. 29, 2021                          
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709 $ 17,355,709
Holdings Count | holding 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85
Advisory Fees Paid, Amount     $ 55,504                                                    
Investment Company, Portfolio Turnover     31.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Software21%
Short-Term Investments0.2%Semiconductors and Semiconductor Equipment17%
Other Assets and Liabilities0.0%Technology Hardware, Storage and Peripherals12%
 Interactive Media and Services11%
 Broadline Retail5%
                                                   
Material Fund Change [Text Block]    
Fund Changes
Effective December 10, 2024, American Century Sustainable Growth ETF will be renamed American Century Large Cap Growth ETF, and the fund’s ticker will change from ESGY to ACGR.
                                                   
C000202059 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century U.S. Quality Growth ETF                                                    
Class Name     American Century U.S. Quality Growth ETF                                                    
Trading Symbol     QGRO                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century U.S. Quality Growth ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century U.S. Quality Growth ETF$330.29%
                                                   
Expenses Paid, Amount     $ 33                                                    
Expense Ratio, Percent     0.29%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century U.S. Quality Growth ETF returned 27.27% for the reporting period ended August 31, 2024.
The commentary below refers to the fund’s performance compared to the Russell 1000 Growth Index.
A risk-on environment over much of the 12-month period broadly favored large-cap stocks, particularly those related to artificial intelligence. This was despite elevated interest rates and worries about a recession that did not happen. Concerns about AI investment and slowing economic conditions led to a rotation to lower volatility and higher-quality stocks near the end of the period.
Consumer discretionary stocks contributed the most to performance. It helped to be underweight in electric vehicle maker Tesla specifically and the automobiles industry more broadly. High interest rates and worries about the economy meant many automakers resorted to price cuts to boost automobile sales. Elsewhere in the sector, select holdings among specialty retailers performed well.
Positioning in the information technology sector detracted most from relative performance. Semiconductor stocks, which benefited from investor focus on AI-related technology, performed very well. Unfortunately, two of the top three overall detractors were underweight positions in semiconductor companies NVIDIA and Broadcom.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 10, 2018 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
American Century U.S. Quality Growth ETF27.27%16.73%14.66%9/10/18
Regulatory Index
Russell 100026.60%15.55%13.47%
Performance Index
American Century U.S. Quality Growth27.79%N/AN/A
Russell 1000 Growth30.75%19.08%16.80%
                                                   
Performance Inception Date                                                       Sep. 10, 2018  
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497 $ 860,374,497
Holdings Count | holding 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185 185
Advisory Fees Paid, Amount     $ 2,332,342                                                    
Investment Company, Portfolio Turnover     172.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks98.9%Software23%
Rights0.0%Semiconductors and Semiconductor Equipment6%
Other Assets and Liabilities1.1%Hotels, Restaurants and Leisure5%
 Biotechnology5%
 Textiles, Apparel and Luxury Goods4%
                                                   
C000197602 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     American Century U.S. Quality Value ETF                                                    
Class Name     American Century U.S. Quality Value ETF                                                    
Trading Symbol     VALQ                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about American Century U.S. Quality Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.                                                    
Additional Information Phone Number     1-800-345-2021                                                    
Additional Information Website     americancentury.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
American Century U.S. Quality Value ETF$320.29%
                                                   
Expenses Paid, Amount     $ 32                                                    
Expense Ratio, Percent     0.29%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
American Century U.S. Quality Value ETF returned 22.91% for the reporting period ended August 31, 2024.
The commentary below refers to the fund’s performance compared to the Russell 1000 Value Index.
A risk-on environment during the period broadly favored large-cap stocks, particularly those related to artificial intelligence. This occurred despite elevated interest rates and worries about a recession that did not happen. Concerns about AI investment and slowing economic conditions led to a rotation toward lower volatility and higher-quality stocks near the end of the period.
Holdings in the information technology sector, for which the fund is overweight relative to the benchmark, contributed to performance during the 12-month period. Stock picks in the semiconductors industry buoyed results. Holdings in companies like Broadcom and Qualcomm aided performance, as did a lack of exposure to Intel, which posted disappointing earnings and suspended its dividend.
Allocation among names in the energy sector also contributed to the fund’s performance. Falling oil prices generally pressured stocks in the oil, gas and consumable fuels industry, so the fund’s underweight position and allocation among names in the industry helped results. Not owning names in the energy equipment and services industry also aided relative performance.
The fund’s underweight position relative to the benchmark in the financials sector curbed performance. Not owning large banks like JPMorgan Chase & Co., Bank of America and Wells Fargo & Co. weighed on results as shares in those institutions broadly advanced during the period. Underweight positions in the capital markets and insurance industries also detracted.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 11, 2018 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
American Century U.S. Quality Value ETF22.91%11.61%8.69%1/11/18
Regulatory Index
Russell 100026.60%15.55%12.95%
Performance Index
Russell 1000 Value21.15%11.16%8.54%
American Century U.S. Quality Value23.33%N/AN/A
                                                   
Performance Inception Date                                                         Jan. 11, 2018
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit americancentury.com for more recent performance information.                                                    
Net Assets $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766 $ 235,968,766
Holdings Count | holding 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242 242
Advisory Fees Paid, Amount     $ 620,921                                                    
Investment Company, Portfolio Turnover     126.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.7%Household Products8%
Other Assets and Liabilities0.3%Electronic Equipment, Instruments and Components6%
 Technology Hardware, Storage and Peripherals5%
 Consumer Staples Distribution & Retail5%
 Machinery5%
                                                   
C000237947 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis All Equity Markets ETF                                                    
Class Name     Avantis All Equity Markets ETF                                                    
Trading Symbol     AVGE                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis All Equity Markets ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis All Equity Markets ETF$30.03%
                                                   
Expenses Paid, Amount     $ 3                                                    
Expense Ratio, Percent     0.03%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis All Equity Markets ETF returned 21.16% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI ACWI IMI.
Global stocks rallied for the 12-month period, which was characterized by weak economic growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and growth broadly outpaced value.
Overweight positions versus the benchmark in large-, mid- and smaller-cap companies, which underperformed, detracted from performance. An underweight to mega caps, which outperformed, also detracted from results.
The fund’s underweight in companies with the lowest combined profitability and book-to-market characteristics, which outperformed, weighed on performance. An overweight to companies with the highest profitability and book-to-market metrics, which underperformed, also detracted.
Country weightings aided performance, largely due to an overweight position in the U.S. and an underweight in France.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 27, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis All Equity Markets ETF21.16%23.51%9/27/22
MSCI ACWI IMI22.62%24.42%
                                                   
Performance Inception Date             Sep. 27, 2022                                            
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207 $ 418,840,207
Holdings Count | holding 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15
Advisory Fees Paid, Amount     $ 93,190                                                    
Investment Company, Portfolio Turnover     2.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Domestic Equity Funds71.4%
International Equity Funds28.5%
Short-Term Investments0.1%
Other Assets and Liabilities0.0%
 
                                                   
C000243037 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis All Equity Markets Value ETF                                                    
Class Name     Avantis All Equity Markets Value ETF                                                    
Trading Symbol     AVGV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis All Equity Markets Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis All Equity Markets Value ETF$30.03%
                                                   
Expenses Paid, Amount     $ 3                                                    
Expense Ratio, Percent     0.03%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis All Equity Markets Value ETF returned 19.95% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI ACWI IMI Value.
Global stocks rallied for the 12-month period, which was characterized by weak economic growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and growth broadly outpaced value.
Overweight positions versus the benchmark in mid- and smaller-cap companies, which underperformed, detracted from performance. An underweight to mega caps, which outperformed, also detracted from results.
The fund’s underweight in companies with the lowest combined profitability and book-to-market characteristics, which outperformed, weighed on performance. An overweight to companies with the highest profitability and book-to-market metrics, which underperformed, also detracted.
Avoiding real estate investment trusts, which underperformed, modestly aided results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 27, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis All Equity Markets Value ETF19.95%20.49%6/27/23
Regulatory Index
MSCI ACWI IMI22.62%21.12%
Performance Index
MSCI ACWI IMI Value20.63%19.38%
                                                   
Performance Inception Date         Jun. 27, 2023                                                
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813 $ 96,172,813
Holdings Count | holding 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
Advisory Fees Paid, Amount     $ 16,886                                                    
Investment Company, Portfolio Turnover     8.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Domestic Equity Funds61.7%
International Equity Funds38.2%
Short-Term Investments0.1%
Other Assets and Liabilities0.0%
 
                                                   
C000243040 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis All International Markets Equity ETF                                                    
Class Name     Avantis All International Markets Equity ETF                                                    
Trading Symbol     AVNM                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis All International Markets Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis All International Markets Equity ETF$30.03%
                                                   
Expenses Paid, Amount     $ 3                                                    
Expense Ratio, Percent     0.03%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis All International Markets Equity ETF returned 18.20% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI ACWI ex USA IMI.
Non-U.S. stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and value broadly outpaced growth.
Country allocations were a key contributor to performance, led by overweight positions versus the benchmark in Taiwan and India.
Overweight positions versus the benchmark in large-, mid- and smaller-cap companies, which underperformed, detracted from performance. An underweight to mega caps, which outperformed, also detracted from results.
The fund’s underweight in companies with the lowest combined profitability and book-to-market characteristics, which outperformed, weighed on performance. An overweight to companies with the highest profitability and book-to-market metrics, which underperformed, also detracted.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 27, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis All International Markets Equity ETF18.20%16.68%6/27/23
MSCI ACWI ex USA IMI17.78%15.54%
                                                   
Performance Inception Date         Jun. 27, 2023                                                
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947 $ 42,545,947
Holdings Count | holding 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
Advisory Fees Paid, Amount     $ 4,153                                                    
Investment Company, Portfolio Turnover     0.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
International Equity Funds100.0%
Short-Term Investments1.2%
Other Assets and Liabilities(1.2)%
 
 
                                                   
C000243041 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis All International Markets Value ETF                                                    
Class Name     Avantis All International Markets Value ETF                                                    
Trading Symbol     AVNV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis All International Markets Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis All International Markets Value ETF$30.03%
                                                   
Expenses Paid, Amount     $ 3                                                    
Expense Ratio, Percent     0.03%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis All International Markets Value ETF returned 18.11% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI ACWI ex USA IMI Value.
Non-U.S. stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and value broadly outpaced growth.
Overweight positions versus the benchmark in mid- and smaller-cap companies, which underperformed, detracted from performance. An underweight to mega caps, which outperformed, also detracted from results.
The fund’s underweight in companies with the lowest combined profitability and book-to-market characteristics, which outperformed, weighed on performance. An overweight to companies with the highest profitability and book-to-market metrics, which underperformed, detracted modestly.
Avoiding real estate investment trusts, which underperformed, aided results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 27, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis All International Markets Value ETF18.11%17.33%6/27/23
Regulatory Index
MSCI ACWI ex USA IMI17.78%15.54%
Performance Index
MSCI ACWI ex USA IMI Value19.10%17.92%
                                                   
Performance Inception Date         Jun. 27, 2023                                                
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601 $ 3,096,601
Holdings Count | holding 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
Advisory Fees Paid, Amount     $ 558                                                    
Investment Company, Portfolio Turnover     0.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
International Equity Funds99.9%
Short-Term Investments0.1%
Other Assets and Liabilities0.0%
 
 
                                                   
C000221278 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Core Fixed Income ETF                                                    
Class Name     Avantis Core Fixed Income ETF                                                    
Trading Symbol     AVIG                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Core Fixed Income ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Core Fixed Income ETF$160.15%
                                                   
Expenses Paid, Amount     $ 16                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Core Fixed Income ETF returned 7.77% for the reporting period ended August 31, 2024.
The fund seeks to maximize total return. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Aggregate Bond Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. Corporate bonds generally outperformed the broad market, as economic growth and corporate earnings remained resilient and credit spreads tightened.
Yield curve positioning and asset allocation were the primary drivers of fund performance. The fund maintained a duration position in line with the benchmark’s.
The fund’s overweight to the corporate sector aided performance as credit spreads tightened during the 12-month period.
The fund’s positioning on the yield curve and exposure to bonds with higher carry and roll-down also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
October 13, 2020 through August 31, 2024

14
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Core Fixed Income ETF7.77%-1.74%10/13/20
Bloomberg U.S. Aggregate Bond7.30%-1.65%
                                                   
Performance Inception Date                                           Oct. 13, 2020              
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926 $ 787,624,926
Holdings Count | holding 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754 754
Advisory Fees Paid, Amount     $ 995,747                                                    
Investment Company, Portfolio Turnover     324.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds62.7%
U.S. Treasury Securities24.7%
U.S. Government Agency Mortgage-Backed Securities18.4%
U.S. Government Agency Securities1.6%
Sovereign Governments and Agencies0.6%
Short-Term Investments10.5%
Other Assets and Liabilities(18.5)%
                                                   
C000221279 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Core Municipal Fixed Income ETF                                                    
Class Name     Avantis Core Municipal Fixed Income ETF                                                    
Trading Symbol     AVMU                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Core Municipal Fixed Income ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Core Municipal Fixed Income ETF$150.15%
                                                   
Expenses Paid, Amount     $ 15                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Core Municipal Fixed Income ETF returned 5.10% for the reporting period ended August 31, 2024.
The fund seeks current income that is exempt from federal income tax. The commentary below refers to the fund’s performance compared to the S&P National AMT-Free Municipal Bond Index.
Aided by a late-2023 rally, municipal bonds generally delivered gains for the 12-month period.
The fund’s underweight duration positioning compared to the benchmark was the primary driver of performance.
To maintain exposure to the bonds with highest carry and roll-down, the fund primarily invested in bonds with less than 20 years to maturity. The underweight to bonds with maturities greater than 20 years detracted from performance. These bonds were the highest performing among the municipal cohort for the reporting period, given the broad rally in fixed income across the entire municipal bond curve.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
December 8, 2020 through August 31, 2024

14
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Core Municipal Fixed Income ETF5.10%-0.17%12/8/20
S&P National AMT-Free Municipal Bond5.74%0.23%
                                                   
Performance Inception Date                                         Dec. 08, 2020                
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753 $ 144,260,753
Holdings Count | holding 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578 578
Advisory Fees Paid, Amount     $ 195,239                                                    
Investment Company, Portfolio Turnover     19.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Portfolio at a Glance
Municipal Securities98.7%Weighted Average Life to Maturity13 years
Short-Term Investments0.3%Modified Duration5 years
Other Assets and Liabilities1.0%
 
 
                                                   
C000214349 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Emerging Markets Equity ETF                                                    
Class Name     Avantis Emerging Markets Equity ETF                                                    
Trading Symbol     AVEM                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Emerging Markets Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Emerging Markets Equity ETF$360.33%
                                                   
Expenses Paid, Amount     $ 36                                                    
Expense Ratio, Percent     0.33%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Emerging Markets Equity ETF returned 17.35% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI Emerging Markets IMI.
Against a backdrop of modest global growth and moderating global inflation, emerging markets (EM) stocks rallied for the 12-month period but lagged developed markets stocks. Within the EM universe, the value style broadly outperformed growth.
The fund’s overweight versus the index in companies with the highest profitability and book-to-market characteristics, which outperformed, contributed to performance. An underweight to companies with the lowest profitability and book-to-market characteristics, which underperformed, also aided results.
The fund’s underweight to mega-cap stocks, which outperformed for the period, detracted from results. Additionally, overweight exposure to mid- and small-cap stocks weighed on performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 17, 2019 through August 31, 2024

14
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Emerging Markets Equity ETF17.35%6.70%9/17/19
MSCI Emerging Markets IMI15.22%4.95%
                                                   
Performance Inception Date                                                   Sep. 17, 2019      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085 $ 6,283,031,085
Holdings Count | holding 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444 3,444
Advisory Fees Paid, Amount     $ 16,239,694                                                    
Investment Company, Portfolio Turnover     2.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks100.8%India22%
Rights0.0%China22%
Warrants0.0%Taiwan22%
Short-Term Investments0.4%South Korea13%
Other Assets and Liabilities(1.2)%Brazil5%
                                                   
C000247037 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Emerging Markets ex-China Equity ETF                                                    
Class Name     Avantis Emerging Markets ex-China Equity ETF                                                    
Trading Symbol     AVXC                                                    
Security Exchange Name     NASDAQ                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Emerging Markets ex-China Equity ETF for the period of March 19, 2024 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
Avantis Emerging Markets ex-China Equity ETF$160.33%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 16                                                    
Expense Ratio, Percent     0.33%                                                    
Net Assets $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818 $ 25,726,818
Holdings Count | holding 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247 2,247
Advisory Fees Paid, Amount     $ 18,299                                                    
Investment Company, Portfolio Turnover     4.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.8%Taiwan26%
Rights0.0%India26%
Warrants0.0%South Korea16%
Short-Term Investments0.3%Brazil7%
Other Assets and Liabilities(0.1)%South Africa5%
                                                   
C000246147 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Emerging Markets Small Cap Equity ETF                                                    
Class Name     Avantis Emerging Markets Small Cap Equity ETF                                                    
Trading Symbol     AVEE                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Emerging Markets Small Cap Equity ETF for the period of November 7, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
Avantis Emerging Markets Small Cap Equity ETF$360.42%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 36                                                    
Expense Ratio, Percent     0.42%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Emerging Markets Small Cap Equity ETF returned 12.02% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI Emerging Markets Small Cap Index.
Global stocks rallied for the fiscal year. Despite underperforming their developed markets peers, largely due to losses in China, emerging markets stocks broadly delivered solid gains. Within the emerging markets asset class, small-cap stocks generally outperformed large-cap stocks, and the value style outpaced growth.
Overweight positions versus the index in micro- and small-cap stocks weighed on results for the period from the fund’s inception through its August 31 fiscal year-end. Underweight positions in mid-, large- and mega-cap stocks also detracted.
Country exposure detracted from performance. Specifically, an overweight position in China and an underweight in India weighed on results.
The fund’s emphasis on stocks with high profitability and book-to-market characteristics aided performance. Similarly, its focus on underweighting companies with unattractive profitability and book-to-market metrics lifted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
November 7, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
Since InceptionInception Date
Avantis Emerging Markets Small Cap Equity ETF12.02%11/7/23
Regulatory Index
MSCI Emerging Markets17.09%
Performance Index
MSCI Emerging Markets Small Cap18.37%
                                                   
Performance Inception Date Nov. 07, 2023                                                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136 $ 22,374,136
Holdings Count | holding 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883 1,883
Advisory Fees Paid, Amount     $ 42,500                                                    
Investment Company, Portfolio Turnover     2.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks100.3%Taiwan21%
Warrants0.0%India20%
Rights0.0%China19%
Short-Term Investments0.2%South Korea12%
Other Assets and Liabilities(0.5)%Brazil8%
                                                   
C000229745 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Emerging Markets Value ETF                                                    
Class Name     Avantis Emerging Markets Value ETF                                                    
Trading Symbol     AVES                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Emerging Markets Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Emerging Markets Value ETF$390.36%
                                                   
Expenses Paid, Amount     $ 39                                                    
Expense Ratio, Percent     0.36%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Emerging Markets Value ETF returned 17.36% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI Emerging Markets IMI Value.
Against a backdrop of modest global growth and moderating global inflation, emerging markets (EM) stocks rallied for the 12-month period but lagged developed markets stocks. Within the EM universe, the value style broadly outperformed growth.
The fund’s overweight versus the index in companies with the highest combined profitability and book-to-market characteristics, which outperformed for the period, contributed to performance. An underweight to companies with the lowest profitability and book-to-market traits, which underperformed, also boosted results.
The fund’s underweight position in mega-cap stocks, which outperformed, and overweight in smaller-cap stocks, which underperformed, detracted from performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 28, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Emerging Markets Value ETF17.36%2.85%9/28/21
Regulatory Index
MSCI Emerging Markets IMI15.22%-1.20%
Performance Index
MSCI Emerging Markets IMI Value16.92%2.00%
                                                   
Performance Inception Date                             Sep. 28, 2021                            
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776 $ 500,630,776
Holdings Count | holding 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613 1,613
Advisory Fees Paid, Amount     $ 1,404,647                                                    
Investment Company, Portfolio Turnover     17.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks101.0%India24%
Rights0.0%Taiwan22%
Warrants0.0%China21%
Short-Term Investments0.7%South Korea13%
Other Assets and Liabilities(1.7)%Brazil5%
                                                   
C000237946 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Inflation Focused Equity ETF                                                    
Class Name     Avantis Inflation Focused Equity ETF                                                    
Trading Symbol     AVIE                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Inflation Focused Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Inflation Focused Equity ETF$270.25%
                                                   
Expenses Paid, Amount     $ 27                                                    
Expense Ratio, Percent     0.25%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Inflation Focused Equity ETF returned 16.56% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 3000 Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results.
The fund’s overweight versus the index in inflation-sensitive sectors, including energy, consumer staples and materials, detracted from performance. The fund holds no exposure to the outperforming information technology sector, which also weighed on results.
The fund’s underweight position in mega-cap companies, which outperformed, also detracted from relative results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 27, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Inflation Focused Equity ETF16.56%19.19%9/27/22
Russell 300026.14%26.49%
                                                   
Performance Inception Date             Sep. 27, 2022                                            
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323 $ 5,268,323
Holdings Count | holding 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357 357
Advisory Fees Paid, Amount     $ 10,718                                                    
Investment Company, Portfolio Turnover     2.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.7%Oil, Gas and Consumable Fuels22%
Short-Term Investments0.2%Insurance12%
Other Assets and Liabilities0.1%Pharmaceuticals11%
 Biotechnology10%
 Health Care Providers and Services10%
                                                   
C000214351 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Equity ETF                                                    
Class Name     Avantis International Equity ETF                                                    
Trading Symbol     AVDE                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis International Equity ETF$250.23%
                                                   
Expenses Paid, Amount     $ 25                                                    
Expense Ratio, Percent     0.23%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Equity ETF returned 18.98% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA IMI.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and value broadly outpaced growth.
Performance across book-to-market and profitability quartiles was mixed. The fund’s underweight versus the index in companies with the lowest combined profitability and book-to-market characteristics contributed to performance. Its overweight to the highest profitability and book-to-market companies detracted from results.
Avoiding real estate investment trusts, which underperformed for the period, modestly aided results.
The fund’s underweight to mega-cap stocks, which outperformed for the period, detracted from performance. Additionally, overweights to mid- and small-cap stocks, which underperformed, weighed on results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 24, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis International Equity ETF18.98%8.52%9/24/19
MSCI World ex USA IMI18.80%7.81%
                                                   
Performance Inception Date                                                     Sep. 24, 2019    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733 $ 5,227,021,733
Holdings Count | holding 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240 3,240
Advisory Fees Paid, Amount     $ 9,258,644                                                    
Investment Company, Portfolio Turnover     3.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.6%Japan21%
Rights0.0%United Kingdom13%
Warrants0.0%Canada10%
Short-Term Investments0.4%France9%
Other Assets and Liabilities0.0%Switzerland8%
                                                   
C000229746 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Large Cap Value ETF                                                    
Class Name     Avantis International Large Cap Value ETF                                                    
Trading Symbol     AVIV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Large Cap Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis International Large Cap Value ETF$270.25%
                                                   
Expenses Paid, Amount     $ 27                                                    
Expense Ratio, Percent     0.25%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Large Cap Value ETF returned 17.68% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA Value Index.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Within the large-cap universe, value stocks broadly outperformed growth stocks.
The fund’s emphasis on companies with the highest profitability and book-to-market characteristics, which underperformed, weighed on results.
An overweight position versus the index in mid-cap stocks, which underperformed, detracted from results. An underweight to mega-cap stocks, which outperformed, also detracted.
Avoiding real estate investment trusts, which underperformed for the period, modestly contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 28, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis International Large Cap Value ETF17.68%6.90%9/28/21
Regulatory Index
MSCI World ex USA19.45%5.24%
Performance Index
MSCI World ex USA Value20.58%8.58%
                                                   
Performance Inception Date                             Sep. 28, 2021                            
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486 $ 421,630,486
Holdings Count | holding 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493 493
Advisory Fees Paid, Amount     $ 816,387                                                    
Investment Company, Portfolio Turnover     16.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.5%Japan19%
Short-Term Investments0.6%United Kingdom16%
Other Assets and Liabilities(0.1)%Canada10%
 Switzerland10%
 France9%
                                                   
C000243038 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Small Cap Equity ETF                                                    
Class Name     Avantis International Small Cap Equity ETF                                                    
Trading Symbol     AVDS                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Small Cap Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis International Small Cap Equity ETF$320.30%
                                                   
Expenses Paid, Amount     $ 32                                                    
Expense Ratio, Percent     0.30%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Small Cap Equity ETF returned 15.78% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA Small Cap Index.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Within the small-cap universe, value stocks broadly outperformed growth stocks.
The fund’s emphasis on companies with the highest combined profitability and book-to-market characteristics, which outperformed, aided performance. An underweight position versus the index in companies with the lowest profitability and book-to-market characteristics, which underperformed, also contributed to results.
Avoiding real estate investment trusts, which underperformed, lifted performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
July 18, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis International Small Cap Equity ETF15.78%10.78%7/18/23
Regulatory Index
MSCI World ex USA19.45%13.74%
Performance Index
MSCI World ex USA Small Cap14.76%9.84%
                                                   
Performance Inception Date       Jul. 18, 2023                                                  
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614 $ 37,473,614
Holdings Count | holding 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665 2,665
Advisory Fees Paid, Amount     $ 41,313                                                    
Investment Company, Portfolio Turnover     7.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.6%Japan31%
Warrants0.0%United Kingdom14%
Short-Term Investments0.4%Canada9%
Other Assets and Liabilities0.0%Australia8%
 Sweden5%
                                                   
C000214352 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Small Cap Value ETF                                                    
Class Name     Avantis International Small Cap Value ETF                                                    
Trading Symbol     AVDV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Small Cap Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis International Small Cap Value ETF$400.36%
                                                   
Expenses Paid, Amount     $ 40                                                    
Expense Ratio, Percent     0.36%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Small Cap Value ETF returned 21.09% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA Small Cap Index.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Within the small-cap universe, value stocks broadly outperformed growth stocks.
The fund’s emphasis on companies with the highest profitability and book-to-market characteristics, which outperformed, contributed to performance. An underweight position versus the index in companies with the lowest profitability and book-to-market traits, which underperformed, also aided results.
Additionally, avoiding real estate investment trusts, which underperformed for the period, lifted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 24, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis International Small Cap Value ETF21.09%9.66%9/24/19
Regulatory Index
MSCI World ex USA19.45%8.09%
Performance Index
MSCI World ex USA Small Cap14.76%6.15%
                                                   
Performance Inception Date                                                     Sep. 24, 2019    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724 $ 6,607,920,724
Holdings Count | holding 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366 1,366
Advisory Fees Paid, Amount     $ 18,447,202                                                    
Investment Company, Portfolio Turnover     8.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.6%Japan31%
Rights0.0%United Kingdom14%
Warrants0.0%Canada10%
Short-Term Investments0.4%Australia8%
Other Assets and Liabilities0.0%Sweden5%
                                                   
C000243039 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Moderate Allocation ETF                                                    
Class Name     Avantis Moderate Allocation ETF                                                    
Trading Symbol     AVMA                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Moderate Allocation ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Moderate Allocation ETF$30.03%
                                                   
Expenses Paid, Amount     $ 3                                                    
Expense Ratio, Percent     0.03%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Moderate Allocation ETF returned 16.68% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the custom index, which consists of 65% MSCI ACWI IMI/35% Bloomberg U.S. Government/Credit 1-5 Year Index.
Global stocks rallied for the 12-month period, which was characterized by weak economic growth, falling interest rates, moderating inflation and resilient corporate earnings results. Against this backdrop, U.S. stocks delivered solid gains but lagged global stocks.
Within the fund’s equity portfolio, overweights versus the index in large-, mid- and smaller-cap stocks, which underperformed, weighed on results. An underweight position in mega caps, which outperformed, also detracted.
The fund’s underweight in companies with the lowest combined profitability and book-to-market characteristics, which outperformed, weighed on performance. An overweight to companies with the highest profitability and book-to-market metrics, which underperformed, detracted modestly.
Within the fixed-income component, an overweight to the corporate sector aided performance as credit spreads tightened during the 12-month period. The fund’s positioning on the yield curve and exposure to bonds with higher carry and roll-down also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 27, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Moderate Allocation ETF16.68%15.97%6/27/23
Regulatory Index
MSCI ACWI IMI22.62%21.12%
Bloomberg U.S. Aggregate Bond7.30%5.31%
Performance Index
65% MSCI ACWI IMI/35% Bloomberg U.S. Government/Credit 1-5 Year16.97%15.81%
                                                   
Performance Inception Date         Jun. 27, 2023                                                
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035 $ 16,162,035
Holdings Count | holding 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17
Advisory Fees Paid, Amount     $ 2,461                                                    
Investment Company, Portfolio Turnover     0.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Domestic Equity Funds48.7%
Domestic Fixed Income Funds31.9%
International Equity Funds19.3%
Short-Term Investments0.1%
Other Assets and Liabilities0.0%
                                                   
C000229748 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Real Estate ETF                                                    
Class Name     Avantis Real Estate ETF                                                    
Trading Symbol     AVRE                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Real Estate ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Real Estate ETF$190.17%
                                                   
Expenses Paid, Amount     $ 19                                                    
Expense Ratio, Percent     0.17%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Real Estate ETF returned 18.38% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the S&P Global REIT Index.
Against a backdrop of falling Treasury yields and broad stock market gains, real estate stocks rallied for the 12-month period.
The fund’s position in telecommunication tower real estate investment trusts (REITs), which are excluded from the index, contributed to performance. An underweight position versus the index in office REITs also aided results. Conversely, underweights in retail and specialized REITs weighed on performance.
The fund’s underweight in smaller-cap REITs, which underperformed, contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 28, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Real Estate ETF18.38%0.10%9/28/21
Regulatory Index
MSCI World IMI23.54%7.52%
Performance Index
S&P Global REIT18.12%0.54%
                                                   
Performance Inception Date                             Sep. 28, 2021                            
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376 $ 558,563,376
Holdings Count | holding 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294 294
Advisory Fees Paid, Amount     $ 702,925                                                    
Investment Company, Portfolio Turnover     2.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Sectors (as a % of net assets)
Common Stocks99.7%Specialized REITs29%
Rights0.0%Industrial REITs18%
Short-Term Investments0.2%Retail REITs16%
Other Assets and Liabilities0.1%Residential REITs13%
 Health Care REITs10%
                                                   
C000234360 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Responsible Emerging Markets Equity ETF                                                    
Class Name     Avantis Responsible Emerging Markets Equity ETF                                                    
Trading Symbol     AVSE                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Responsible Emerging Markets Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Responsible Emerging Markets Equity ETF$360.33%
                                                   
Expenses Paid, Amount     $ 36                                                    
Expense Ratio, Percent     0.33%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Responsible Emerging Markets Equity ETF returned 18.23% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI Emerging Markets IMI.
Against a backdrop of modest global growth and moderating global inflation, emerging markets (EM) stocks rallied for the 12-month period but lagged developed markets stocks. Within the EM universe, the value style broadly outperformed growth.
The fund’s underweight versus the benchmark to companies with the lowest profitability and book-to-market characteristics, which underperformed, contributed to performance. The fund’s overweight to companies with the highest profitability and book-to-market traits, which outperformed, also aided results.
Overall, country exposure contributed to performance, mainly due to overweight positions in Taiwan and India and avoiding Saudi Arabia.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
March 28, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Responsible Emerging Markets Equity ETF18.23%4.80%3/28/22
MSCI Emerging Markets IMI15.22%2.67%
                                                   
Performance Inception Date                   Mar. 28, 2022                                      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671 $ 81,466,671
Holdings Count | holding 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288
Advisory Fees Paid, Amount     $ 221,279                                                    
Investment Company, Portfolio Turnover     5.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks100.9%India24%
Warrants0.0%Taiwan22%
Rights0.0%China21%
Short-Term Investments0.8%South Korea13%
Other Assets and Liabilities(1.7)%Brazil5%
                                                   
C000234361 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Responsible International Equity ETF                                                    
Class Name     Avantis Responsible International Equity ETF                                                    
Trading Symbol     AVSD                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Responsible International Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Responsible International Equity ETF$250.23%
                                                   
Expenses Paid, Amount     $ 25                                                    
Expense Ratio, Percent     0.23%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Responsible International Equity ETF returned 20.94% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA IMI.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and value broadly outpaced growth.
The fund’s underweight versus the benchmark to companies with the lowest profitability and book-to-market characteristics, which underperformed, aided performance. The fund’s overweight to companies with high profitability and book-to-market characteristics, which outperformed, also lifted results.
The fund’s overweight position in the financials sector and underweights in the energy and consumer staples sectors aided performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
March 15, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Responsible International Equity ETF20.94%9.53%3/15/22
MSCI World ex USA IMI18.80%9.20%
                                                   
Performance Inception Date                     Mar. 15, 2022                                    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720 $ 149,076,720
Holdings Count | holding 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075 2,075
Advisory Fees Paid, Amount     $ 297,574                                                    
Investment Company, Portfolio Turnover     5.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.6%Japan21%
Rights0.0%United Kingdom14%
Warrants0.0%Canada10%
Short-Term Investments0.8%France9%
Other Assets and Liabilities(0.4)%Switzerland8%
                                                   
C000234362 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Responsible U.S. Equity ETF                                                    
Class Name     Avantis Responsible U.S. Equity ETF                                                    
Trading Symbol     AVSU                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Responsible U.S. Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Responsible U.S. Equity ETF$170.15%
                                                   
Expenses Paid, Amount     $ 17                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Responsible U.S. Equity ETF returned 24.98% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 3000 Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the U.S. market, stocks of companies with the largest market capitalizations broadly outperformed their smaller peers, while growth and value styles were mixed.
The fund’s overweight position versus the benchmark in large-, mid- and smaller-cap companies, which underperformed, weighed on performance. An underweight to mega-cap companies, which outperformed, also detracted.
The fund’s underweight to companies with the lowest profitability and book-to-market characteristics, which underperformed, aided performance. An overweight to companies with the highest profitability and book-to-market traits also lifted results.
The fund’s underweight position in the energy sector and overweight exposure to the financials sector contributed to performance. An underweight to the real estate sector also aided results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
March 15, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Responsible U.S. Equity ETF24.98%11.64%3/15/22
Russell 300026.14%13.02%
                                                   
Performance Inception Date                     Mar. 15, 2022                                    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762 $ 291,224,762
Holdings Count | holding 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286 1,286
Advisory Fees Paid, Amount     $ 345,009                                                    
Investment Company, Portfolio Turnover     3.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Semiconductors and Semiconductor Equipment9%
Rights0.0%Software7%
Short-Term Investments0.1%Technology Hardware, Storage and Peripherals6%
Other Assets and Liabilities0.1%Banks6%
 Interactive Media and Services5%
                                                   
C000221280 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Short-Term Fixed Income ETF                                                    
Class Name     Avantis Short-Term Fixed Income ETF                                                    
Trading Symbol     AVSF                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Short-Term Fixed Income ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis Short-Term Fixed Income ETF$160.15%
                                                   
Expenses Paid, Amount     $ 16                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Short-Term Fixed Income ETF returned 6.74% for the reporting period ended August 31, 2024.
The fund seeks to maximize total return. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Government/Credit 1-5 Year Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. However, credit spread performance was somewhat mixed among short-dated corporate bonds. Credit spreads widened for bonds with less than two years to maturity and tightened for bonds with maturities between three to five years.
Duration positioning and asset allocation were the primary drivers of fund performance.
The fund’s overweight versus the benchmark to the corporate sector aided performance. The fund’s positioning on the yield curve across various maturities also contributed to performance.
To maintain exposure to the bonds with highest carry and roll-down, the fund maintained a duration slightly shorter than the benchmark’s. This detracted from performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
October 13, 2020 through August 31, 2024

14
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis Short-Term Fixed Income ETF6.74%0.61%10/13/20
Regulatory Index
Bloomberg U.S. Aggregate Bond7.30%-1.65%
Performance Index
Bloomberg U.S. Government/Credit 1-5 Year6.67%0.50%
                                                   
Performance Inception Date                                           Oct. 13, 2020              
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574 $ 407,649,574
Holdings Count | holding 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532
Advisory Fees Paid, Amount     $ 468,201                                                    
Investment Company, Portfolio Turnover     39.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds75.4%
U.S. Treasury Securities20.0%
U.S. Government Agency Securities2.3%
Sovereign Governments and Agencies0.2%
Short-Term Investments1.1%
Other Assets and Liabilities1.0%
                                                   
C000214353 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Equity ETF                                                    
Class Name     Avantis U.S. Equity ETF                                                    
Trading Symbol     AVUS                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis U.S. Equity ETF$170.15%
                                                   
Expenses Paid, Amount     $ 17                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Equity ETF returned 24.05% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 3000 Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the U.S. market, stocks of companies with the largest market capitalizations broadly outperformed their smaller peers, while growth and value styles were mixed.
Against this backdrop, the fund’s underweight versus the index in mega-cap stocks, which outperformed, weighed on results. Overweight positions in large-, mid-, small- and micro-cap stocks also detracted from results.
The fund’s sector weightings modestly detracted, largely due to an overweight to energy and an underweight to information technology.
The fund’s underweight to companies with the lowest profitability and book-to-market characteristics and overweight to companies with the highest profitability and book-to-market traits aided performance. Avoiding real estate investment trusts, which underperformed for the period, modestly boosted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 24, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis U.S. Equity ETF24.05%15.16%9/24/19
Russell 300026.14%15.05%
                                                   
Performance Inception Date                                                     Sep. 24, 2019    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153 $ 7,126,742,153
Holdings Count | holding 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288 2,288
Advisory Fees Paid, Amount     $ 8,858,000                                                    
Investment Company, Portfolio Turnover     1.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Semiconductors and Semiconductor Equipment7%
Rights0.0%Oil, Gas and Consumable Fuels7%
Escrow Interests0.0%Software6%
Short-Term Investments0.1%Banks6%
Other Assets and Liabilities0.1%Technology Hardware, Storage and Peripherals5%
                                                   
C000243042 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Large Cap Equity ETF                                                    
Class Name     Avantis U.S. Large Cap Equity ETF                                                    
Trading Symbol     AVLC                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Large Cap Equity ETF for the period of September 26, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
Avantis U.S. Large Cap Equity ETF$160.15%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 16                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Large Cap Equity ETF returned 32.49% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 1000 Index.
U.S. stocks rallied for the reporting period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the large-cap universe, growth stocks broadly outperformed value stocks.
The fund’s overweight versus the index in mid- and large-cap stocks, which underperformed between September 26, 2023 (the fund’s inception date), through August 31, 2024, weighed on results. Additionally, the fund’s underweight in mega-cap stocks, which outperformed, detracted from results.
A relative underweight in companies with the lowest combined profitability and book-to-market characteristics, which underperformed, aided the fund’s performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 26, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
Since InceptionInception Date
Avantis U.S. Large Cap Equity ETF32.49%9/26/23
Russell 100033.49%
                                                   
Performance Inception Date   Sep. 26, 2023                                                      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891 $ 396,167,891
Holdings Count | holding 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992 992
Advisory Fees Paid, Amount     $ 326,572                                                    
Investment Company, Portfolio Turnover     3.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Semiconductors and Semiconductor Equipment9%
Short-Term Investments0.1%Software8%
Other Assets and Liabilities0.1%Oil, Gas and Consumable Fuels6%
 Technology Hardware, Storage and Peripherals6%
 Interactive Media and Services5%
                                                   
C000229747 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Large Cap Value ETF                                                    
Class Name     Avantis U.S. Large Cap Value ETF                                                    
Trading Symbol     AVLV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Large Cap Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis U.S. Large Cap Value ETF$170.15%
                                                   
Expenses Paid, Amount     $ 17                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Large Cap Value ETF returned 21.25% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 1000 Value Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the large-cap universe, growth stocks broadly outperformed value stocks.
The fund focuses on companies with more attractive combined profitability and book-to-market characteristics in the large-cap universe. While results were mixed across this spectrum, names with better combined characteristics generally outperformed, contributing to the fund’s performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 21, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis U.S. Large Cap Value ETF21.25%11.29%9/21/21
Regulatory Index
Russell 100026.60%9.82%
Performance Index
Russell 1000 Value21.15%8.85%
                                                   
Performance Inception Date                           Sep. 21, 2021                              
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092 $ 4,348,250,092
Holdings Count | holding 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309 309
Advisory Fees Paid, Amount     $ 4,100,779                                                    
Investment Company, Portfolio Turnover     5.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Oil, Gas and Consumable Fuels14%
Short-Term Investments0.2%Insurance7%
Other Assets and Liabilities0.0%Consumer Staples Distribution & Retail7%
 Banks6%
 Interactive Media and Services6%
                                                   
C000246148 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Mid Cap Equity ETF                                                    
Class Name     Avantis U.S. Mid Cap Equity ETF                                                    
Trading Symbol     AVMC                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Mid Cap Equity ETF for the period of November 7, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
Avantis U.S. Mid Cap Equity ETF$170.18%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 17                                                    
Expense Ratio, Percent     0.18%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Mid Cap Equity ETF returned 28.10% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell Midcap Index.
Amid a backdrop of moderating inflation, resilient economic growth, solid earnings results and stable Federal Reserve policy, U.S.mid-cap stocks rallied for the reporting period. Mid-cap stocks broadly outperformed their smaller-cap peers but lagged large caps.
The fund’s underweight versus the index to micro- and small-cap stocks, which underperformed, aided fund performance for the period from the fund’s inception through August 31, 2024. A corresponding overweight to mid-cap stocks, which underperformed, weighed on results.
The fund’s emphasis on companies with the highest combined profitability and book-to-market characteristics detracted from performance.
The fund’s avoidance of real estate investment trusts, which outperformed, weighed on results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
November 7, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
Since InceptionInception Date
Avantis U.S. Mid Cap Equity ETF28.10%11/7/23
Regulatory Index
Russell 300030.27%
Performance Index
Russell Midcap27.92%
                                                   
Performance Inception Date Nov. 07, 2023                                                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220 $ 96,897,220
Holdings Count | holding 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521 521
Advisory Fees Paid, Amount     $ 45,661                                                    
Investment Company, Portfolio Turnover     3.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Insurance6%
Short-Term Investments0.1%Oil, Gas and Consumable Fuels6%
Other Assets and Liabilities0.1%Capital Markets5%
 Machinery5%
 Banks5%
                                                   
C000246149 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Mid Cap Value ETF                                                    
Class Name     Avantis U.S. Mid Cap Value ETF                                                    
Trading Symbol     AVMV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Mid Cap Value ETF for the period of November 7, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
Avantis U.S. Mid Cap Value ETF$190.20%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 19                                                    
Expense Ratio, Percent     0.20%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Mid Cap Value ETF returned 28.81% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell Midcap Value Index.
Amid a backdrop of moderating inflation, resilient economic growth, solid earnings results and stable Federal Reserve policy, U.S.mid-cap stocks rallied for the reporting period. Mid-cap stocks broadly outperformed their smaller-cap peers but lagged large caps. Within the mid-cap universe, the value style generally outpaced the growth style.
The fund’s emphasis on companies with the highest profitability characteristics, which outperformed, aided performance for the nearly 10-month period from the fund’s inception through August 31, 2024. An underweight position versus the index to companies in the lowest profitability quartile, which underperformed, also boosted results.
Meanwhile, an overweight to companies with the highest book-to-market values and underweight to companies with the lowest book-to-market metrics detracted from results.
The fund’s avoidance of real estate investment trusts, which outperformed for the reporting period, weighed on performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
November 7, 2023 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
Since InceptionInception Date
Avantis U.S. Mid Cap Value ETF28.81%11/7/23
Regulatory Index
Russell 300030.27%
Performance Index
Russell Midcap Value28.59%
                                                   
Performance Inception Date Nov. 07, 2023                                                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176 $ 71,586,176
Holdings Count | holding 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232 232
Advisory Fees Paid, Amount     $ 36,182                                                    
Investment Company, Portfolio Turnover     10.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.7%Oil, Gas and Consumable Fuels10%
Short-Term Investments0.1%Banks8%
Other Assets and Liabilities0.2%Insurance8%
 Specialty Retail6%
 Building Products5%
                                                   
C000233056 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Small Cap Equity ETF                                                    
Class Name     Avantis U.S. Small Cap Equity ETF                                                    
Trading Symbol     AVSC                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Small Cap Equity ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis U.S. Small Cap Equity ETF$270.25%
                                                   
Expenses Paid, Amount     $ 27                                                    
Expense Ratio, Percent     0.25%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Small Cap Equity ETF returned 18.11% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 2000 Index.
Amid a backdrop of moderating inflation, resilient economic growth, solid earnings results and stable Federal Reserve policy, U.S. small-cap stocks rallied for the reporting period.
The fund’s underweight versus the index in companies with the lowest profitability and book-to-market characteristics, which underperformed, aided performance for the 12-month period. Overweighting companies with the highest profitability and book-to-market characteristics, which outperformed, modestly contributed to results.
Large overweights to micro- and small-cap stocks, which underperformed, weighed on results for the period.
Avoiding real estate investment trusts, which outperformed for the period, modestly detracted from performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 11, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis U.S. Small Cap Equity ETF18.11%4.47%1/11/22
Regulatory Index
Russell 300026.14%7.81%
Performance Index
Russell 200018.47%1.90%
                                                   
Performance Inception Date                       Jan. 11, 2022                                  
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611 $ 1,312,837,611
Holdings Count | holding 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235 1,235
Advisory Fees Paid, Amount     $ 2,051,854                                                    
Investment Company, Portfolio Turnover     5.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.9%Banks19%
Rights0.0%Oil, Gas and Consumable Fuels5%
Short-Term Investments0.8%Biotechnology5%
Other Assets and Liabilities(0.7)%Machinery4%
 Insurance3%
                                                   
C000214354 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Small Cap Value ETF                                                    
Class Name     Avantis U.S. Small Cap Value ETF                                                    
Trading Symbol     AVUV                                                    
Security Exchange Name     NYSEArca                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Small Cap Value ETF for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Avantis U.S. Small Cap Value ETF$280.25%
                                                   
Expenses Paid, Amount     $ 28                                                    
Expense Ratio, Percent     0.25%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Small Cap Value ETF returned 20.24% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 2000 Value Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the small-cap universe, value stocks broadly outperformed their growth-stock counterparts.
Against this backdrop, the fund’s focus on companies with the highest combined profitability and book-to-market characteristics contributed to performance. An underweight position versus the index in the lowest profitability and book-to-market companies also boosted results.
An overweight position in small- and mid-cap stocks and an underweight in micro-cap stocks aided results. Avoiding real estate investment trusts, which underperformed for the period, also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
September 24, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Avantis U.S. Small Cap Value ETF20.24%15.91%9/24/19
Regulatory Index
Russell 300026.14%15.05%
Performance Index
Russell 2000 Value19.25%9.38%
                                                   
Performance Inception Date                                                     Sep. 24, 2019    
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878 $ 13,186,674,878
Holdings Count | holding 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737 737
Advisory Fees Paid, Amount     $ 24,182,002                                                    
Investment Company, Portfolio Turnover     4.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Banks19%
Short-Term Investments0.1%Oil, Gas and Consumable Fuels11%
Other Assets and Liabilities0.1%Financial Services4%
 Specialty Retail4%
 Energy Equipment and Services4%
                                                   
C000221281 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Core Fixed Income Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVIGX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Core Fixed Income Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$160.15%
                                                   
Expenses Paid, Amount     $ 16                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Core Fixed Income Fund Institutional Class returned 7.57% for the reporting period ended August 31, 2024.
The fund seeks to maximize total return. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Aggregate Bond Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. Corporate bonds generally outperformed the broad market, as economic growth and corporate earnings remained resilient and credit spreads tightened.
Yield curve positioning and asset allocation were the primary drivers of fund performance. The fund maintained a duration position in line with the benchmark’s.
The fund’s overweight to the corporate sector aided performance as credit spreads tightened during the 12-month period.
The fund’s positioning on the yield curve and exposure to bonds with higher carry and roll-down also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
February 24, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class7.57%-1.60%2/24/21
Bloomberg U.S. Aggregate Bond7.30%-1.37%
                                                   
Performance Inception Date                                 Feb. 24, 2021                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467
Holdings Count | holding 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343
Advisory Fees Paid, Amount     $ 8,624                                                    
Investment Company, Portfolio Turnover     325.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds61.8%
U.S. Treasury Securities24.6%
U.S. Government Agency Mortgage-Backed Securities19.0%
U.S. Government Agency Securities1.5%
Sovereign Governments and Agencies1.0%
Short-Term Investments12.1%
Other Assets and Liabilities(20.0)%
                                                   
C000226122 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Core Fixed Income Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVBNX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Core Fixed Income Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Core Fixed Income Fund G Class returned 7.73% for the reporting period ended August 31, 2024.
The fund seeks to maximize total return. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Aggregate Bond Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. Corporate bonds generally outperformed the broad market, as economic growth and corporate earnings remained resilient and credit spreads tightened.
Yield curve positioning and asset allocation were the primary drivers of fund performance. The fund maintained a duration position in line with the benchmark’s.
The fund’s overweight to the corporate sector aided performance as credit spreads tightened during the 12-month period.
The fund’s positioning on the yield curve and exposure to bonds with higher carry and roll-down also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
February 24, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class7.73%-1.42%2/24/21
Bloomberg U.S. Aggregate Bond7.30%-1.37%
                                                   
Performance Inception Date                                 Feb. 24, 2021                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467 $ 64,272,467
Holdings Count | holding 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343 343
Advisory Fees Paid, Amount     $ 8,624                                                    
Investment Company, Portfolio Turnover     325.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds61.8%
U.S. Treasury Securities24.6%
U.S. Government Agency Mortgage-Backed Securities19.0%
U.S. Government Agency Securities1.5%
Sovereign Governments and Agencies1.0%
Short-Term Investments12.1%
Other Assets and Liabilities(20.0)%
                                                   
C000214357 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Emerging Markets Equity Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVEEX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Emerging Markets Equity Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$360.33%
                                                   
Expenses Paid, Amount     $ 36                                                    
Expense Ratio, Percent     0.33%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Emerging Markets Equity Fund Institutional Class returned 18.01% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI Emerging Markets IMI.
Against a backdrop of modest global growth and moderating global inflation, emerging markets (EM) stocks rallied for the 12-month period but lagged developed markets stocks. Within the EM universe, the value style broadly outperformed growth.
The fund’s overweight versus the index in companies with the highest profitability and book-to-market characteristics, which outperformed, contributed to performance. An underweight to companies with the lowest profitability and book-to-market characteristics, which underperformed, also aided results.
The fund’s underweight to mega-cap stocks, which outperformed for the period, detracted from results. Additionally, overweight exposure to mid- and smaller-cap stocks weighed on performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
December 4, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class18.01%6.68%12/4/19
MSCI Emerging Markets IMI15.22%4.74%
                                                   
Performance Inception Date                                                 Dec. 04, 2019        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444
Holdings Count | holding 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185
Advisory Fees Paid, Amount     $ 1,137,338                                                    
Investment Company, Portfolio Turnover     10.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks100.2%India23%
Warrants0.0%China22%
Rights0.0%Taiwan21%
Short-Term Investments1.6%South Korea13%
Other Assets and Liabilities(1.8)%Brazil5%
                                                   
C000226120 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Emerging Markets Equity Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVENX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Emerging Markets Equity Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Emerging Markets Equity Fund G Class returned 18.36% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI Emerging Markets IMI.
Against a backdrop of modest global growth and moderating global inflation, emerging markets (EM) stocks rallied for the 12-month period but lagged developed markets stocks. Within the EM universe, the value style broadly outperformed growth.
The fund’s overweight versus the index in companies with the highest profitability and book-to-market characteristics, which outperformed, contributed to performance. An underweight to companies with the lowest profitability and book-to-market characteristics, which underperformed, also aided results.
The fund’s underweight to mega-cap stocks, which outperformed for the period, detracted from results. Additionally, overweight exposure to mid- and smaller-cap stocks weighed on performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 20, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class18.36%0.72%1/20/21
MSCI Emerging Markets IMI15.22%-2.74%
                                                   
Performance Inception Date                                   Jan. 20, 2021                      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444 $ 481,783,444
Holdings Count | holding 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185 3,185
Advisory Fees Paid, Amount     $ 1,137,338                                                    
Investment Company, Portfolio Turnover     10.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks100.2%India23%
Warrants0.0%China22%
Rights0.0%Taiwan21%
Short-Term Investments1.6%South Korea13%
Other Assets and Liabilities(1.8)%Brazil5%
                                                   
C000214358 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Equity Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVDEX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Equity Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$250.23%
                                                   
Expenses Paid, Amount     $ 25                                                    
Expense Ratio, Percent     0.23%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Equity Fund Institutional Class returned 18.99% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA IMI.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and value broadly outpaced growth.
Performance across book-to-market and profitability quartiles was mixed. The fund’s underweight versus the index in companies with the lowest combined profitability and book-to-market characteristics contributed to performance. The fund's overweight to the highest profitability and book-to-market companies detracted from results.
Avoiding real estate investment trusts, which underperformed for the period, modestly aided results.
The fund’s underweight to mega-cap stocks, which outperformed for the period, detracted from performance. Additionally, overweights to mid- and small-cap stocks, which underperformed, weighed on results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
December 4, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class18.99%7.84%12/4/19
MSCI World ex USA IMI18.80%7.30%
                                                   
Performance Inception Date                                                 Dec. 04, 2019        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063
Holdings Count | holding 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909
Advisory Fees Paid, Amount     $ 479,898                                                    
Investment Company, Portfolio Turnover     10.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.0%Japan22%
Rights0.0%United Kingdom13%
Warrants0.0%Canada10%
Short-Term Investments3.3%France9%
Other Assets and Liabilities(2.3)%Switzerland8%
                                                   
C000226121 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Equity Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVDNX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Equity Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Equity Fund G Class returned 19.14% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA IMI.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Large-cap stocks generally fared better than small caps, and value broadly outpaced growth.
Performance across book-to-market and profitability quartiles was mixed. The fund’s underweight versus the index in companies with the lowest combined profitability and book-to-market characteristics contributed to performance. The fund's overweight to the highest profitability and book-to-market companies detracted from results.
Avoiding real estate investment trusts, which underperformed for the period, modestly aided results.
The fund’s underweight to mega-cap stocks, which outperformed for the period, detracted from performance. Additionally, overweights to mid- and small-cap stocks, which underperformed, weighed on results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 20, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class19.14%6.30%1/20/21
MSCI World ex USA IMI18.80%5.47%
                                                   
Performance Inception Date                                   Jan. 20, 2021                      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063 $ 253,631,063
Holdings Count | holding 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909 2,909
Advisory Fees Paid, Amount     $ 479,898                                                    
Investment Company, Portfolio Turnover     10.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.0%Japan22%
Rights0.0%United Kingdom13%
Warrants0.0%Canada10%
Short-Term Investments3.3%France9%
Other Assets and Liabilities(2.3)%Switzerland8%
                                                   
C000214350 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Small Cap Value Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVDVX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Small Cap Value Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$400.36%
                                                   
Expenses Paid, Amount     $ 40                                                    
Expense Ratio, Percent     0.36%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Small Cap Value Fund Institutional Class returned 20.77% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA Small Cap Index.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Within the small-cap universe, value stocks broadly outperformed growth stocks.
The fund’s emphasis on companies with the highest profitability and book-to-market characteristics, which outperformed, contributed to performance. An underweight position versus the index in companies with the lowest profitability and book-to-market traits, which underperformed, also aided results.
Additionally, avoiding real estate investment trusts, which underperformed for the period, lifted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
December 4, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class20.77%9.07%12/4/19
Regulatory Index
MSCI World ex USA19.45%7.66%
Performance Index
MSCI World ex USA Small Cap14.76%5.17%
                                                   
Performance Inception Date                                                 Dec. 04, 2019        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715
Holdings Count | holding 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371
Advisory Fees Paid, Amount     $ 1,063,791                                                    
Investment Company, Portfolio Turnover     26.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan31%
Warrants0.0%United Kingdom14%
Rights0.0%Canada10%
Short-Term Investments3.5%Australia8%
Other Assets and Liabilities(2.0)%Sweden5%
                                                   
C000226117 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis International Small Cap Value Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVANX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis International Small Cap Value Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis International Small Cap Value Fund G Class returned 21.16% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the MSCI World ex USA Small Cap Index.
Non-U.S. developed markets stocks rallied for the 12-month period, which was characterized by weak global growth, falling interest rates, moderating inflation and resilient corporate earnings results. Within the small-cap universe, value stocks broadly outperformed growth stocks.
The fund’s emphasis on companies with the highest profitability and book-to-market characteristics, which outperformed, contributed to performance. An underweight position versus the index in companies with the lowest profitability and book-to-market traits, which underperformed, also aided results.
Additionally, avoiding real estate investment trusts, which underperformed for the period, lifted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 20, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class21.16%8.17%1/20/21
Regulatory Index
MSCI World ex USA19.45%6.16%
Performance Index
MSCI World ex USA Small Cap14.76%1.46%
                                                   
Performance Inception Date                                   Jan. 20, 2021                      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715 $ 367,593,715
Holdings Count | holding 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371 1,371
Advisory Fees Paid, Amount     $ 1,063,791                                                    
Investment Company, Portfolio Turnover     26.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan31%
Warrants0.0%United Kingdom14%
Rights0.0%Canada10%
Short-Term Investments3.5%Australia8%
Other Assets and Liabilities(2.0)%Sweden5%
                                                   
C000221283 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Short-Term Fixed Income Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVSFX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Short-Term Fixed Income Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$160.15%
                                                   
Expenses Paid, Amount     $ 16                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Short-Term Fixed Income Fund Institutional Class returned 6.71% for the reporting period ended August 31, 2024.
The fund seeks to maximize total return. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Government/Credit 1-5 Year Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. However, credit spread performance was somewhat mixed among short-dated corporate bonds. Credit spreads widened for bonds with less than two years to maturity and tightened for bonds with maturities between three to five years.
Duration positioning and asset allocation were the primary drivers of fund performance.
The fund’s overweight versus the benchmark to the corporate sector aided performance. The fund’s positioning on the yield curve across various maturities also contributed to performance.
To maintain exposure to the bonds with highest carry and roll-down, the fund maintained a duration slightly shorter than the benchmark’s. This detracted from performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
February 24, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class6.71%0.64%2/24/21
Regulatory Index
Bloomberg U.S. Aggregate Bond7.30%-1.37%
Performance Index
Bloomberg U.S. Government/Credit 1-5 Year6.67%0.51%
                                                   
Performance Inception Date                                 Feb. 24, 2021                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716
Holdings Count | holding 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161
Advisory Fees Paid, Amount     $ 12,737                                                    
Investment Company, Portfolio Turnover     44.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds73.9%
U.S. Treasury Securities19.7%
U.S. Government Agency Securities3.0%
Short-Term Investments2.0%
Other Assets and Liabilities1.4%
                                                   
C000226124 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis Short-Term Fixed Income Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVGNX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis Short-Term Fixed Income Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis Short-Term Fixed Income Fund G Class returned 6.87% for the reporting period ended August 31, 2024.
The fund seeks to maximize total return. The commentary below refers to the fund’s performance compared to the Bloomberg U.S. Government/Credit 1-5 Year Index.
Treasury yields declined and inflation moderated for the 12-month period, which supported widespread gains across the U.S. fixed-income market. However, credit spread performance was somewhat mixed among short-dated corporate bonds. Credit spreads widened for bonds with less than two years to maturity and tightened for bonds with maturities between three to five years.
Duration positioning and asset allocation were the primary drivers of fund performance.
The fund’s overweight versus the benchmark to the corporate sector aided performance. The fund’s positioning on the yield curve across various maturities also contributed to performance.
To maintain exposure to the bonds with highest carry and roll-down, the fund maintained a duration slightly shorter than the benchmark’s. This detracted from performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
February 24, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class6.87%0.79%2/24/21
Regulatory Index
Bloomberg U.S. Aggregate Bond7.30%-1.37%
Performance Index
Bloomberg U.S. Government/Credit 1-5 Year6.67%0.51%
                                                   
Performance Inception Date                                 Feb. 24, 2021                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716 $ 12,709,716
Holdings Count | holding 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161 161
Advisory Fees Paid, Amount     $ 12,737                                                    
Investment Company, Portfolio Turnover     44.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Corporate Bonds73.9%
U.S. Treasury Securities19.7%
U.S. Government Agency Securities3.0%
Short-Term Investments2.0%
Other Assets and Liabilities1.4%
                                                   
C000214355 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Equity Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVUSX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Equity Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$170.15%
                                                   
Expenses Paid, Amount     $ 17                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Equity Fund Institutional Class returned 23.72% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 3000 Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the U.S. market, stocks of companies with the largest market capitalizations broadly outperformed their smaller peers, while growth and value styles were mixed.
Against this backdrop, the fund’s underweight versus the index in mega-cap stocks, which outperformed, weighed on results. Overweight positions in large-, mid-, small- and micro-cap stocks also detracted from results.
The fund’s sector weightings modestly detracted, largely due to an overweight to energy and an underweight to information technology.
The fund’s underweight to companies with the lowest profitability and book-to-market characteristics and overweight to companies with the highest profitability and book-to-market traits aided performance. Avoiding real estate investment trusts, which underperformed for the period, modestly boosted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
December 4, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class23.72%14.37%12/4/19
Russell 300026.14%14.44%
                                                   
Performance Inception Date                                                 Dec. 04, 2019        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311
Holdings Count | holding 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899
Advisory Fees Paid, Amount     $ 921,762                                                    
Investment Company, Portfolio Turnover     10.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Semiconductors and Semiconductor Equipment7%
Rights0.0%Oil, Gas and Consumable Fuels7%
Escrow Interests0.0%Software6%
Short-Term Investments0.1%Banks6%
Other Assets and Liabilities0.1%Technology Hardware, Storage and Peripherals5%
                                                   
C000226118 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Equity Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVUNX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Equity Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Equity Fund G Class returned 23.88% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 3000 Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the U.S. market, stocks of companies with the largest market capitalizations broadly outperformed their smaller peers, while growth and value styles were mixed.
Against this backdrop, the fund’s underweight versus the index in mega-cap stocks, which outperformed, weighed on results. Overweight positions in large-, mid-, small- and micro-cap stocks also detracted from results.
The fund’s sector weightings modestly detracted, largely due to an overweight to energy and an underweight to information technology.
The fund’s underweight to companies with the lowest profitability and book-to-market characteristics and overweight to companies with the highest profitability and book-to-market traits aided performance. Avoiding real estate investment trusts, which underperformed for the period, modestly boosted results.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 20, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class23.88%11.23%1/20/21
Russell 300026.14%11.08%
                                                   
Performance Inception Date                                   Jan. 20, 2021                      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311 $ 745,829,311
Holdings Count | holding 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899 1,899
Advisory Fees Paid, Amount     $ 921,762                                                    
Investment Company, Portfolio Turnover     10.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.8%Semiconductors and Semiconductor Equipment7%
Rights0.0%Oil, Gas and Consumable Fuels7%
Escrow Interests0.0%Software6%
Short-Term Investments0.1%Banks6%
Other Assets and Liabilities0.1%Technology Hardware, Storage and Peripherals5%
                                                   
C000236476 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Large Cap Value Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVLVX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Large Cap Value Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$170.15%
                                                   
Expenses Paid, Amount     $ 17                                                    
Expense Ratio, Percent     0.15%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Large Cap Value Fund Institutional Class returned 21.77% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 1000 Value Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the large-cap universe, growth stocks broadly outperformed value stocks.
The fund focuses on companies with more attractive combined profitability and book-to-market characteristics in the large-cap universe. While results were mixed across this spectrum, names with better combined characteristics generally outperformed, contributing to the fund’s performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 21, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class21.77%18.01%6/21/22
Regulatory Index
Russell 100026.60%21.88%
Performance Index
Russell 1000 Value21.15%15.31%
                                                   
Performance Inception Date                 Jun. 21, 2022                                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503
Holdings Count | holding 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278
Advisory Fees Paid, Amount     $ 314,903                                                    
Investment Company, Portfolio Turnover     17.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Oil, Gas and Consumable Fuels12%
Short-Term Investments0.7%Banks7%
Other Assets and Liabilities(0.2)%Consumer Staples Distribution & Retail7%
 Insurance6%
 Interactive Media and Services5%
                                                   
C000236477 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Large Cap Value Fund                                                    
Class Name     G Class                                                    
Trading Symbol     ALCEX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Large Cap Value Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Large Cap Value Fund G Class returned 21.94% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 1000 Value Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the large-cap universe, growth stocks broadly outperformed value stocks.
The fund focuses on companies with more attractive combined profitability and book-to-market characteristics in the large-cap universe. While results were mixed across this spectrum, names with better combined characteristics generally outperformed, contributing to the fund’s performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
June 21, 2022 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class21.94%18.18%6/21/22
Regulatory Index
Russell 100026.60%21.88%
Performance Index
Russell 1000 Value21.15%15.31%
                                                   
Performance Inception Date                 Jun. 21, 2022                                        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503 $ 298,573,503
Holdings Count | holding 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278 278
Advisory Fees Paid, Amount     $ 314,903                                                    
Investment Company, Portfolio Turnover     17.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Oil, Gas and Consumable Fuels12%
Short-Term Investments0.7%Banks7%
Other Assets and Liabilities(0.2)%Consumer Staples Distribution & Retail7%
 Insurance6%
 Interactive Media and Services5%
                                                   
C000250327 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Small Cap Equity Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVSCX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Small Cap Equity Fund for the period of June 20, 2024 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
Institutional Class$50.25%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 5                                                    
Expense Ratio, Percent     0.25%                                                    
Net Assets $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053
Holdings Count | holding 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832
Advisory Fees Paid, Amount     $ 803                                                    
Investment Company, Portfolio Turnover     0.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Banks20%
Short-Term Investments0.8%Machinery4%
Other Assets and Liabilities(0.1)%Biotechnology4%
 Oil, Gas and Consumable Fuels4%
 Insurance4%
                                                   
C000250326 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Small Cap Equity Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVSBX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Small Cap Equity Fund for the period of June 20, 2024 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
*The costs of an investment would have been greater had the class been available for a full year.
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Net Assets $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053 $ 2,207,053
Holdings Count | holding 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832 832
Advisory Fees Paid, Amount     $ 803                                                    
Investment Company, Portfolio Turnover     0.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Banks20%
Short-Term Investments0.8%Machinery4%
Other Assets and Liabilities(0.1)%Biotechnology4%
 Oil, Gas and Consumable Fuels4%
 Insurance4%
                                                   
C000214356 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Small Cap Value Fund                                                    
Class Name     Institutional Class                                                    
Trading Symbol     AVUVX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Small Cap Value Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class$270.25%
                                                   
Expenses Paid, Amount     $ 27                                                    
Expense Ratio, Percent     0.25%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Small Cap Value Fund Institutional Class returned 19.76% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 2000 Value Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the small-cap universe, value stocks broadly outperformed their growth-stock counterparts.
Against this backdrop, the fund’s focus on companies with the highest combined profitability and book-to-market characteristics contributed to performance. An underweight position versus the index in the lowest profitability and book-to-market companies also boosted results.
An overweight position in small- and mid-cap stocks and an underweight in micro-cap stocks aided results. Avoiding real estate investment trusts, which underperformed for the period, also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
December 4, 2019 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
Institutional Class19.76%16.39%12/4/19
Regulatory Index
Russell 300026.14%14.44%
Performance Index
Russell 2000 Value19.25%8.89%
                                                   
Performance Inception Date                                                 Dec. 04, 2019        
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871
Holdings Count | holding 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693
Advisory Fees Paid, Amount     $ 1,502,919                                                    
Investment Company, Portfolio Turnover     21.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Banks16%
Short-Term Investments1.6%Oil, Gas and Consumable Fuels12%
Other Assets and Liabilities(0.9)%Financial Services5%
 Specialty Retail4%
 Energy Equipment and Services4%
                                                   
C000226119 [Member]                                                          
Shareholder Report [Line Items]                                                          
Fund Name     Avantis U.S. Small Cap Value Fund                                                    
Class Name     G Class                                                    
Trading Symbol     AVCNX                                                    
Annual or Semi-Annual Statement [Text Block]     This annual shareholder report contains important information about Avantis U.S. Small Cap Value Fund for the period of September 1, 2023 to August 31, 2024.                                                    
Shareholder Report Annual or Semi-Annual     annual shareholder report                                                    
Additional Information [Text Block]     You can find additional information about the fund at avantisinvestors.com/docs. You can also request this information by contacting us at 1-833-928-2684.                                                    
Additional Information Phone Number     1-833-928-2684                                                    
Additional Information Website     avantisinvestors.com/docs                                                    
Expenses [Text Block]    
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$00.00%
                                                   
Expenses Paid, Amount     $ 0                                                    
Expense Ratio, Percent     0.00%                                                    
Factors Affecting Performance [Text Block]    
What were the key factors that affected the fund’s performance?
Avantis U.S. Small Cap Value Fund G Class returned 20.03% for the reporting period ended August 31, 2024.
The fund seeks long-term capital appreciation. The commentary below refers to the fund’s performance compared to the Russell 2000 Value Index.
U.S. stocks rallied for the 12-month period, which was characterized by resilient economic growth, falling Treasury yields, moderating inflation and generally healthy corporate earnings results. Within the small-cap universe, value stocks broadly outperformed their growth-stock counterparts.
Against this backdrop, the fund’s focus on companies with the highest combined profitability and book-to-market characteristics contributed to performance. An underweight position versus the index in the lowest profitability and book-to-market companies also boosted results.
An overweight position in small- and mid-cap stocks and an underweight in micro-cap stocks aided results. Avoiding real estate investment trusts, which underperformed for the period, also contributed to performance.
                                                   
Line Graph [Table Text Block]    
Cumulative Performance (based on an initial $10,000 investment)
January 20, 2021 through August 31, 2024

10
                                                   
Average Annual Return [Table Text Block]    
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class20.03%13.96%1/20/21
Regulatory Index
Russell 300026.14%11.08%
Performance Index
Russell 2000 Value19.25%6.57%
                                                   
Performance Inception Date                                   Jan. 20, 2021                      
No Deduction of Taxes [Text Block]     The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.                                                    
Updated Performance Information Location [Text Block]     Visit avantisinvestors.com for more recent performance information.                                                    
Net Assets $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871 $ 861,219,871
Holdings Count | holding 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693 693
Advisory Fees Paid, Amount     $ 1,502,919                                                    
Investment Company, Portfolio Turnover     21.00%                                                    
Holdings [Text Block]    
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Banks16%
Short-Term Investments1.6%Oil, Gas and Consumable Fuels12%
Other Assets and Liabilities(0.9)%Financial Services5%
 Specialty Retail4%
 Energy Equipment and Services4%