Performance Management - World Mutual Funds Prospectus |
Apr. 01, 2026 |
|---|---|
| Emerging Markets Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (2Q 2020): 21.32% Lowest Performance Quarter (1Q 2020): -23.22% |
| Performance Table Heading | Average Annual Total ReturnsFor the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes, other than foreign withholding tax) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
|
| Performance Availability Website Address [Text] | americancentury.com |
| Emerging Markets Fund | Emerging Markets Fund, Investor Class | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 21.32% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (23.22%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |
| Focused Global Growth Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (2Q 2020): 23.58% Lowest Performance Quarter (2Q 2022): -17.57% |
| Performance Table Heading | Average Annual Total ReturnsFor the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
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| Performance Availability Website Address [Text] | americancentury.com |
| Focused Global Growth Fund | FOCUSED GLOBAL GROWTH FUND, INVESTOR CLASS | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 23.58% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (17.57%) |
| Lowest Quarterly Return, Date | Jun. 30, 2022 |
| Focused International Growth Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (2Q 2020): 22.91% Lowest Performance Quarter (1Q 2020): -17.90% |
| Performance Table Heading | Average Annual Total ReturnsFor the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes, other than foreign withholding tax) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
|
| Performance Availability Website Address [Text] | americancentury.com |
| Focused International Growth Fund | Focused International Growth Fund, Investor Class | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 22.91% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (17.90%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |
| Global Small Cap Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows returns for the MSCI ACWI Small Cap Index, which the advisor considers to be more representative of the fund’s investment strategy. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Performance Additional Market Index [Text] | The table also shows returns for the MSCI ACWI Small Cap Index, which the advisor considers to be more representative of the fund’s investment strategy. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (2Q 2020): 37.39% Lowest Performance Quarter (4Q 2018): -23.15% |
| Performance Table Heading | Average Annual Total ReturnsFor the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes, other than foreign withholding tax) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
|
| Performance Availability Website Address [Text] | americancentury.com |
| Global Small Cap Fund | Global Small Cap Fund, Investor Class | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 37.39% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (23.15%) |
| Lowest Quarterly Return, Date | Dec. 31, 2018 |
| International Growth Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (2Q 2020): 22.43% Lowest Performance Quarter (1Q 2020): -19.18% |
| Performance Table Heading | Average Annual Total Returns For the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
|
| Performance Availability Website Address [Text] | americancentury.com |
| International Growth Fund | International Growth Fund, Investor Class | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 22.43% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (19.18%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |
| International Opportunities Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows returns for the MSCI ACWI ex-U.S. Small Cap Growth Index, which the advisor considers to be more representative of the fund’s investment strategy. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Performance Additional Market Index [Text] | The table also shows returns for the MSCI ACWI ex-U.S. Small Cap Growth Index, which the advisor considers to be more representative of the fund’s investment strategy. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (2Q 2020): 32.07% Lowest Performance Quarter (1Q 2020): -23.14% |
| Performance Table Heading | Average Annual Total Returns For the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
|
| Performance Availability Website Address [Text] | americancentury.com |
| International Opportunities Fund | INTERNATIONAL OPPORTUNITIES FUND, INVESTOR CLASS | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 32.07% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (23.14%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |
| International Small-Mid Cap Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows returns for the MSCI EAFE Small Cap Index, which the advisor considers to be more representative of the fund’s investment strategy. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Performance Additional Market Index [Text] | The table also shows returns for the MSCI EAFE Small Cap Index, which the advisor considers to be more representative of the fund’s investment strategy. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (2Q 2020): 33.95% Lowest Performance Quarter (1Q 2020): -25.14%
|
| Performance Table Heading | Average Annual Total Returns For the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes, other than foreign withholding tax) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. The after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
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| International Small-Mid Cap Fund | International Small-Mid Cap Fund, Investor Class | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 33.95% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (25.14%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |
| International Value Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows returns for the MSCI EAFE Value Index, which the advisor considers to be more representative of the fund’s investment strategy. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Performance Additional Market Index [Text] | The table also shows returns for the MSCI EAFE Value Index, which the advisor considers to be more representative of the fund’s investment strategy. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (4Q 2020): 19.80% Lowest Performance Quarter (1Q 2020): -22.90% |
| Performance Table Heading | Average Annual Total Returns For the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
|
| Performance Availability Website Address [Text] | americancentury.com |
| International Value Fund | INTERNATIONAL VALUE FUND, INVESTOR CLASS | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 19.80% |
| Highest Quarterly Return, Date | Dec. 31, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (22.90%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |
| Non-U.S. Intrinsic Value Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance |
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, please visit americancentury.com. Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.
|
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown. |
| Bar Chart [Heading] | Calendar Year Total Returns |
| Bar Chart Closing [Text Block] | Highest Performance Quarter (4Q 2022): 21.67% Lowest Performance Quarter (1Q 2020): -35.69%
|
| Performance Table Heading | Average Annual Total ReturnsFor the calendar year ended December 31, 2025 |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes, other than foreign withholding tax) |
| Performance Table Closing [Text Block] | The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.
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| Performance Availability Website Address [Text] | americancentury.com |
| Non-U.S. Intrinsic Value Fund | NON-U.S. INTRINSIC VALUE FUND, INVESTOR CLASS | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Performance Quarter |
| Highest Quarterly Return | 21.67% |
| Highest Quarterly Return, Date | Dec. 31, 2022 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Performance Quarter |
| Lowest Quarterly Return | (35.69%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |