v3.25.2
Shareholder Report
 6 Months Ended
May 31, 2025
USD ($)
holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
Entity Central Index Key 0000872825
Entity Investment Company Type N-1A
Document Period End Date May 31, 2025
C000018021 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name Investor Class
Trading Symbol TWMIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$651.26%
Expenses Paid, Amount $ 65
Expense Ratio, Percent 1.26%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000018023 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name I Class
Trading Symbol AMKIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$541.06%
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.06%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000189777 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name Y Class
Trading Symbol AEYMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Y Class$470.91%
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.91%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000018022 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name A Class
Trading Symbol AEMMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$771.51%
Expenses Paid, Amount $ 77
Expense Ratio, Percent 1.51%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000018024 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name C Class
Trading Symbol ACECX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1162.26%
Expenses Paid, Amount $ 116
Expense Ratio, Percent 2.26%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000055528 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name R Class
Trading Symbol AEMRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$901.76%
Expenses Paid, Amount $ 90
Expense Ratio, Percent 1.76%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000189779 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name R5 Class
Trading Symbol AEGMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$541.06%
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.06%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000131622 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name R6 Class
Trading Symbol AEDMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$470.91%
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.91%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000236495 [Member]  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Fund
Class Name G Class
Trading Symbol ACADX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (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$10.01%
Expenses Paid, Amount $ 1
Expense Ratio, Percent 0.01%
Net Assets $ 1,734,106,053
Holdings Count | holding 79
Advisory Fees Paid, Amount $ 5,406,394
Investment Company, Portfolio Turnover 29.00%
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%China28%
Short-Term Investments1.6%India19%
Other Assets and Liabilities(0.6)%Taiwan16%
 South Korea8%
 Brazil6%
C000018025 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name Investor Class
Trading Symbol TWGGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$561.10%
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.10%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000018027 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name I Class
Trading Symbol AGGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$460.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000189780 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name Y Class
Trading Symbol AGYGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Y Class$380.75%
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000018026 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name A Class
Trading Symbol AGGRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$691.35%
Expenses Paid, Amount $ 69
Expense Ratio, Percent 1.35%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000018030 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name C Class
Trading Symbol AGLCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1072.10%
Expenses Paid, Amount $ 107
Expense Ratio, Percent 2.10%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000018031 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name R Class
Trading Symbol AGORX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$821.60%
Expenses Paid, Amount $ 82
Expense Ratio, Percent 1.60%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000189781 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name R5 Class
Trading Symbol AGFGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$460.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000131623 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused Global Growth Fund
Class Name R6 Class
Trading Symbol AGGDX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$380.75%
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75%
Net Assets $ 642,461,617
Holdings Count | holding 38
Advisory Fees Paid, Amount $ 3,093,989
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 Stocks98.6%United States68%
Short-Term Investments1.6%United Kingdom6%
Other Assets and Liabilities(0.2)%France5%
 Japan5%
 Germany3%
C000167113 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused International Growth Fund
Class Name Investor Class
Trading Symbol AFCNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$571.10%
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.10%
Net Assets $ 131,240,843
Holdings Count | holding 48
Advisory Fees Paid, Amount $ 217,826
Investment Company, Portfolio Turnover 45.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.4%Japan15%
Short-Term Investments3.2%Germany14%
Other Assets and Liabilities(1.6)%United Kingdom14%
 France11%
 Switzerland8%
C000167114 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused International Growth Fund
Class Name I Class
Trading Symbol AFCSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$470.90%
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.90%
Net Assets $ 131,240,843
Holdings Count | holding 48
Advisory Fees Paid, Amount $ 217,826
Investment Company, Portfolio Turnover 45.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.4%Japan15%
Short-Term Investments3.2%Germany14%
Other Assets and Liabilities(1.6)%United Kingdom14%
 France11%
 Switzerland8%
C000167115 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused International Growth Fund
Class Name A Class
Trading Symbol AFCLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$701.35%
Expenses Paid, Amount $ 70
Expense Ratio, Percent 1.35%
Net Assets $ 131,240,843
Holdings Count | holding 48
Advisory Fees Paid, Amount $ 217,826
Investment Company, Portfolio Turnover 45.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.4%Japan15%
Short-Term Investments3.2%Germany14%
Other Assets and Liabilities(1.6)%United Kingdom14%
 France11%
 Switzerland8%
C000167116 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused International Growth Fund
Class Name C Class
Trading Symbol AFCHX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1092.10%
Expenses Paid, Amount $ 109
Expense Ratio, Percent 2.10%
Net Assets $ 131,240,843
Holdings Count | holding 48
Advisory Fees Paid, Amount $ 217,826
Investment Company, Portfolio Turnover 45.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.4%Japan15%
Short-Term Investments3.2%Germany14%
Other Assets and Liabilities(1.6)%United Kingdom14%
 France11%
 Switzerland8%
C000167117 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused International Growth Fund
Class Name R Class
Trading Symbol AFCWX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$831.60%
Expenses Paid, Amount $ 83
Expense Ratio, Percent 1.60%
Net Assets $ 131,240,843
Holdings Count | holding 48
Advisory Fees Paid, Amount $ 217,826
Investment Company, Portfolio Turnover 45.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.4%Japan15%
Short-Term Investments3.2%Germany14%
Other Assets and Liabilities(1.6)%United Kingdom14%
 France11%
 Switzerland8%
C000167118 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused International Growth Fund
Class Name R6 Class
Trading Symbol AFCMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$390.75%
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.75%
Net Assets $ 131,240,843
Holdings Count | holding 48
Advisory Fees Paid, Amount $ 217,826
Investment Company, Portfolio Turnover 45.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.4%Japan15%
Short-Term Investments3.2%Germany14%
Other Assets and Liabilities(1.6)%United Kingdom14%
 France11%
 Switzerland8%
C000212502 [Member]  
Shareholder Report [Line Items]  
Fund Name Focused International Growth Fund
Class Name G Class
Trading Symbol AFCGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (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$10.01%
Expenses Paid, Amount $ 1
Expense Ratio, Percent 0.01%
Net Assets $ 131,240,843
Holdings Count | holding 48
Advisory Fees Paid, Amount $ 217,826
Investment Company, Portfolio Turnover 45.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.4%Japan15%
Short-Term Investments3.2%Germany14%
Other Assets and Liabilities(1.6)%United Kingdom14%
 France11%
 Switzerland8%
C000167125 [Member]  
Shareholder Report [Line Items]  
Fund Name Global Small Cap Fund
Class Name Investor Class
Trading Symbol AGCVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$541.11%
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.11%
Net Assets $ 85,073,036
Holdings Count | holding 148
Advisory Fees Paid, Amount $ 386,077
Investment Company, Portfolio Turnover 71.00%
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%United States49%
Exchange-Traded Funds0.0%Canada11%
Short-Term Investments2.2%Japan8%
Other Assets and Liabilities(3.0)%Germany5%
 United Kingdom4%
C000167126 [Member]  
Shareholder Report [Line Items]  
Fund Name Global Small Cap Fund
Class Name I Class
Trading Symbol AGCSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$450.91%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.91%
Net Assets $ 85,073,036
Holdings Count | holding 148
Advisory Fees Paid, Amount $ 386,077
Investment Company, Portfolio Turnover 71.00%
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%United States49%
Exchange-Traded Funds0.0%Canada11%
Short-Term Investments2.2%Japan8%
Other Assets and Liabilities(3.0)%Germany5%
 United Kingdom4%
C000167127 [Member]  
Shareholder Report [Line Items]  
Fund Name Global Small Cap Fund
Class Name A Class
Trading Symbol AGCLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$671.36%
Expenses Paid, Amount $ 67
Expense Ratio, Percent 1.36%
Net Assets $ 85,073,036
Holdings Count | holding 148
Advisory Fees Paid, Amount $ 386,077
Investment Company, Portfolio Turnover 71.00%
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%United States49%
Exchange-Traded Funds0.0%Canada11%
Short-Term Investments2.2%Japan8%
Other Assets and Liabilities(3.0)%Germany5%
 United Kingdom4%
C000167128 [Member]  
Shareholder Report [Line Items]  
Fund Name Global Small Cap Fund
Class Name C Class
Trading Symbol AGCHX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1032.11%
Expenses Paid, Amount $ 103
Expense Ratio, Percent 2.11%
Net Assets $ 85,073,036
Holdings Count | holding 148
Advisory Fees Paid, Amount $ 386,077
Investment Company, Portfolio Turnover 71.00%
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%United States49%
Exchange-Traded Funds0.0%Canada11%
Short-Term Investments2.2%Japan8%
Other Assets and Liabilities(3.0)%Germany5%
 United Kingdom4%
C000167129 [Member]  
Shareholder Report [Line Items]  
Fund Name Global Small Cap Fund
Class Name R Class
Trading Symbol AGCWX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$791.61%
Expenses Paid, Amount $ 79
Expense Ratio, Percent 1.61%
Net Assets $ 85,073,036
Holdings Count | holding 148
Advisory Fees Paid, Amount $ 386,077
Investment Company, Portfolio Turnover 71.00%
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%United States49%
Exchange-Traded Funds0.0%Canada11%
Short-Term Investments2.2%Japan8%
Other Assets and Liabilities(3.0)%Germany5%
 United Kingdom4%
C000167130 [Member]  
Shareholder Report [Line Items]  
Fund Name Global Small Cap Fund
Class Name R6 Class
Trading Symbol AGCTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$370.76%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.76%
Net Assets $ 85,073,036
Holdings Count | holding 148
Advisory Fees Paid, Amount $ 386,077
Investment Company, Portfolio Turnover 71.00%
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%United States49%
Exchange-Traded Funds0.0%Canada11%
Short-Term Investments2.2%Japan8%
Other Assets and Liabilities(3.0)%Germany5%
 United Kingdom4%
C000018035 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name Investor Class
Trading Symbol TWIEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$641.23%
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.23%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000018037 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name I Class
Trading Symbol TGRIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$541.03%
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.03%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000189783 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name Y Class
Trading Symbol ATYGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Y Class$460.88%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.88%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000018036 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name A Class
Trading Symbol TWGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$771.48%
Expenses Paid, Amount $ 77
Expense Ratio, Percent 1.48%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000018040 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name C Class
Trading Symbol AIWCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1162.23%
Expenses Paid, Amount $ 116
Expense Ratio, Percent 2.23%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000018041 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name R Class
Trading Symbol ATGRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$901.73%
Expenses Paid, Amount $ 90
Expense Ratio, Percent 1.73%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000189784 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name R5 Class
Trading Symbol ATGGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$541.03%
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.03%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000131624 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name R6 Class
Trading Symbol ATGDX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$460.88%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.88%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000236496 [Member]  
Shareholder Report [Line Items]  
Fund Name International Growth Fund
Class Name G Class
Trading Symbol ACAEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (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$20.03%
Expenses Paid, Amount $ 2
Expense Ratio, Percent 0.03%
Net Assets $ 2,716,754,511
Holdings Count | holding 96
Advisory Fees Paid, Amount $ 7,251,375
Investment Company, Portfolio Turnover 31.00%
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%Japan18%
Short-Term Investments1.1%United Kingdom15%
Other Assets and Liabilities(0.1)%France15%
 Germany14%
 Switzerland8%
C000018042 [Member]  
Shareholder Report [Line Items]  
Fund Name International Opportunities Fund
Class Name Investor Class
Trading Symbol AIOIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$761.46%
Expenses Paid, Amount $ 76
Expense Ratio, Percent 1.46%
Net Assets $ 479,954,347
Holdings Count | holding 131
Advisory Fees Paid, Amount $ 3,136,543
Investment Company, Portfolio Turnover 55.00%
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%Japan22%
Exchange-Traded Funds0.3%Canada11%
Short-Term Investments2.9%Germany9%
Other Assets and Liabilities(2.8)%United Kingdom8%
 India7%
C000018043 [Member]  
Shareholder Report [Line Items]  
Fund Name International Opportunities Fund
Class Name I Class
Trading Symbol ACIOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$651.26%
Expenses Paid, Amount $ 65
Expense Ratio, Percent 1.26%
Net Assets $ 479,954,347
Holdings Count | holding 131
Advisory Fees Paid, Amount $ 3,136,543
Investment Company, Portfolio Turnover 55.00%
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%Japan22%
Exchange-Traded Funds0.3%Canada11%
Short-Term Investments2.9%Germany9%
Other Assets and Liabilities(2.8)%United Kingdom8%
 India7%
C000088079 [Member]  
Shareholder Report [Line Items]  
Fund Name International Opportunities Fund
Class Name A Class
Trading Symbol AIVOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$891.71%
Expenses Paid, Amount $ 89
Expense Ratio, Percent 1.71%
Net Assets $ 479,954,347
Holdings Count | holding 131
Advisory Fees Paid, Amount $ 3,136,543
Investment Company, Portfolio Turnover 55.00%
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%Japan22%
Exchange-Traded Funds0.3%Canada11%
Short-Term Investments2.9%Germany9%
Other Assets and Liabilities(2.8)%United Kingdom8%
 India7%
C000088080 [Member]  
Shareholder Report [Line Items]  
Fund Name International Opportunities Fund
Class Name C Class
Trading Symbol AIOCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1272.46%
Expenses Paid, Amount $ 127
Expense Ratio, Percent 2.46%
Net Assets $ 479,954,347
Holdings Count | holding 131
Advisory Fees Paid, Amount $ 3,136,543
Investment Company, Portfolio Turnover 55.00%
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%Japan22%
Exchange-Traded Funds0.3%Canada11%
Short-Term Investments2.9%Germany9%
Other Assets and Liabilities(2.8)%United Kingdom8%
 India7%
C000088081 [Member]  
Shareholder Report [Line Items]  
Fund Name International Opportunities Fund
Class Name R Class
Trading Symbol AIORX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1011.96%
Expenses Paid, Amount $ 101
Expense Ratio, Percent 1.96%
Net Assets $ 479,954,347
Holdings Count | holding 131
Advisory Fees Paid, Amount $ 3,136,543
Investment Company, Portfolio Turnover 55.00%
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%Japan22%
Exchange-Traded Funds0.3%Canada11%
Short-Term Investments2.9%Germany9%
Other Assets and Liabilities(2.8)%United Kingdom8%
 India7%
C000152811 [Member]  
Shareholder Report [Line Items]  
Fund Name International Small-Mid Cap Fund
Class Name Investor Class
Trading Symbol ANTSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Small-Mid Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$731.41%
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.41%
Net Assets $ 527,511,245
Holdings Count | holding 125
Advisory Fees Paid, Amount $ 593,618
Investment Company, Portfolio Turnover 66.00%
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%Japan32%
Exchange-Traded Funds1.8%Australia10%
Short-Term Investments0.8%Germany10%
Other Assets and Liabilities(1.6)%United Kingdom9%
 Switzerland7%
C000152812 [Member]  
Shareholder Report [Line Items]  
Fund Name International Small-Mid Cap Fund
Class Name G Class
Trading Symbol ANTMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Small-Mid Cap Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (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$10.01%
Expenses Paid, Amount $ 1
Expense Ratio, Percent 0.01%
Net Assets $ 527,511,245
Holdings Count | holding 125
Advisory Fees Paid, Amount $ 593,618
Investment Company, Portfolio Turnover 66.00%
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%Japan32%
Exchange-Traded Funds1.8%Australia10%
Short-Term Investments0.8%Germany10%
Other Assets and Liabilities(1.6)%United Kingdom9%
 Switzerland7%
C000018052 [Member]  
Shareholder Report [Line Items]  
Fund Name International Value Fund
Class Name Investor Class
Trading Symbol ACEVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$621.13%
Expenses Paid, Amount $ 62
Expense Ratio, Percent 1.13%
Net Assets $ 1,401,821,274
Holdings Count | holding 185
Advisory Fees Paid, Amount $ 1,266,731
Investment Company, Portfolio Turnover 40.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.6%Japan20%
Short-Term Investments1.9%United Kingdom18%
Other Assets and Liabilities(0.5)%France13%
 Germany9%
 Switzerland8%
C000018053 [Member]  
Shareholder Report [Line Items]  
Fund Name International Value Fund
Class Name I Class
Trading Symbol ACVUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$510.93%
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.93%
Net Assets $ 1,401,821,274
Holdings Count | holding 185
Advisory Fees Paid, Amount $ 1,266,731
Investment Company, Portfolio Turnover 40.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.6%Japan20%
Short-Term Investments1.9%United Kingdom18%
Other Assets and Liabilities(0.5)%France13%
 Germany9%
 Switzerland8%
C000018054 [Member]  
Shareholder Report [Line Items]  
Fund Name International Value Fund
Class Name A Class
Trading Symbol MEQAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$761.38%
Expenses Paid, Amount $ 76
Expense Ratio, Percent 1.38%
Net Assets $ 1,401,821,274
Holdings Count | holding 185
Advisory Fees Paid, Amount $ 1,266,731
Investment Company, Portfolio Turnover 40.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.6%Japan20%
Short-Term Investments1.9%United Kingdom18%
Other Assets and Liabilities(0.5)%France13%
 Germany9%
 Switzerland8%
C000018056 [Member]  
Shareholder Report [Line Items]  
Fund Name International Value Fund
Class Name C Class
Trading Symbol ACCOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1172.13%
Expenses Paid, Amount $ 117
Expense Ratio, Percent 2.13%
Net Assets $ 1,401,821,274
Holdings Count | holding 185
Advisory Fees Paid, Amount $ 1,266,731
Investment Company, Portfolio Turnover 40.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.6%Japan20%
Short-Term Investments1.9%United Kingdom18%
Other Assets and Liabilities(0.5)%France13%
 Germany9%
 Switzerland8%
C000018057 [Member]  
Shareholder Report [Line Items]  
Fund Name International Value Fund
Class Name R Class
Trading Symbol ACVRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$891.63%
Expenses Paid, Amount $ 89
Expense Ratio, Percent 1.63%
Net Assets $ 1,401,821,274
Holdings Count | holding 185
Advisory Fees Paid, Amount $ 1,266,731
Investment Company, Portfolio Turnover 40.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.6%Japan20%
Short-Term Investments1.9%United Kingdom18%
Other Assets and Liabilities(0.5)%France13%
 Germany9%
 Switzerland8%
C000131625 [Member]  
Shareholder Report [Line Items]  
Fund Name International Value Fund
Class Name R6 Class
Trading Symbol ACVDX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$430.78%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.78%
Net Assets $ 1,401,821,274
Holdings Count | holding 185
Advisory Fees Paid, Amount $ 1,266,731
Investment Company, Portfolio Turnover 40.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.6%Japan20%
Short-Term Investments1.9%United Kingdom18%
Other Assets and Liabilities(0.5)%France13%
 Germany9%
 Switzerland8%
C000236497 [Member]  
Shareholder Report [Line Items]  
Fund Name International Value Fund
Class Name G Class
Trading Symbol ACAFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (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$20.03%
Expenses Paid, Amount $ 2
Expense Ratio, Percent 0.03%
Net Assets $ 1,401,821,274
Holdings Count | holding 185
Advisory Fees Paid, Amount $ 1,266,731
Investment Company, Portfolio Turnover 40.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.6%Japan20%
Short-Term Investments1.9%United Kingdom18%
Other Assets and Liabilities(0.5)%France13%
 Germany9%
 Switzerland8%
C000205778 [Member]  
Shareholder Report [Line Items]  
Fund Name Non-U.S. Intrinsic Value Fund
Class Name Investor Class
Trading Symbol ANTUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$651.20%
Expenses Paid, Amount $ 65
Expense Ratio, Percent 1.20%
Net Assets $ 568,668,032
Holdings Count | holding 58
Advisory Fees Paid, Amount $ 602,905
Investment Company, Portfolio Turnover 42.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.8%United Kingdom28%
Short-Term Investments2.2%France19%
Other Assets and Liabilities0.0%South Korea14%
 Germany11%
 Netherlands7%
C000216231 [Member]  
Shareholder Report [Line Items]  
Fund Name Non-U.S. Intrinsic Value Fund
Class Name I Class
Trading Symbol ANVHX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$541.00%
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.00%
Net Assets $ 568,668,032
Holdings Count | holding 58
Advisory Fees Paid, Amount $ 602,905
Investment Company, Portfolio Turnover 42.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.8%United Kingdom28%
Short-Term Investments2.2%France19%
Other Assets and Liabilities0.0%South Korea14%
 Germany11%
 Netherlands7%
C000216232 [Member]  
Shareholder Report [Line Items]  
Fund Name Non-U.S. Intrinsic Value Fund
Class Name A Class
Trading Symbol ANVLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$781.45%
Expenses Paid, Amount $ 78
Expense Ratio, Percent 1.45%
Net Assets $ 568,668,032
Holdings Count | holding 58
Advisory Fees Paid, Amount $ 602,905
Investment Company, Portfolio Turnover 42.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.8%United Kingdom28%
Short-Term Investments2.2%France19%
Other Assets and Liabilities0.0%South Korea14%
 Germany11%
 Netherlands7%
C000216233 [Member]  
Shareholder Report [Line Items]  
Fund Name Non-U.S. Intrinsic Value Fund
Class Name R Class
Trading Symbol ANVRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$921.70%
Expenses Paid, Amount $ 92
Expense Ratio, Percent 1.70%
Net Assets $ 568,668,032
Holdings Count | holding 58
Advisory Fees Paid, Amount $ 602,905
Investment Company, Portfolio Turnover 42.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.8%United Kingdom28%
Short-Term Investments2.2%France19%
Other Assets and Liabilities0.0%South Korea14%
 Germany11%
 Netherlands7%
C000216230 [Member]  
Shareholder Report [Line Items]  
Fund Name Non-U.S. Intrinsic Value Fund
Class Name R6 Class
Trading Symbol ANVMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$460.85%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.85%
Net Assets $ 568,668,032
Holdings Count | holding 58
Advisory Fees Paid, Amount $ 602,905
Investment Company, Portfolio Turnover 42.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.8%United Kingdom28%
Short-Term Investments2.2%France19%
Other Assets and Liabilities0.0%South Korea14%
 Germany11%
 Netherlands7%
C000205779 [Member]  
Shareholder Report [Line Items]  
Fund Name Non-U.S. Intrinsic Value Fund
Class Name G Class
Trading Symbol ANTGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-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 six months? (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$30.05%
Expenses Paid, Amount $ 3
Expense Ratio, Percent 0.05%
Net Assets $ 568,668,032
Holdings Count | holding 58
Advisory Fees Paid, Amount $ 602,905
Investment Company, Portfolio Turnover 42.00%
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.8%United Kingdom28%
Short-Term Investments2.2%France19%
Other Assets and Liabilities0.0%South Korea14%
 Germany11%
 Netherlands7%