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Shareholder Report
 12 Months Ended 44 Months Ended 72 Months Ended 80 Months Ended 84 Months Ended 104 Months Ended 116 Months Ended
Nov. 30, 2025
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Nov. 30, 2025
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Nov. 30, 2025
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Nov. 30, 2025
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Nov. 30, 2025
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Shareholder Report [Line Items]              
Document Type N-CSR            
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 Nov. 30, 2025            
Shareholder Report Annual or Semi-Annual Annual Shareholder Report            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1461.26%
            
Expenses Paid, Amount $ 146            
Expense Ratio, Percent 1.26%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund Investor Class returned 31.85% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
4398046511114
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class31.85%2.57%7.00%
MSCI Emerging Markets29.51%5.06%7.85%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$1231.06%
            
Expenses Paid, Amount $ 123            
Expense Ratio, Percent 1.06%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund I Class returned 32.01% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class32.01%2.77%7.22%
MSCI Emerging Markets29.51%5.06%7.85%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Y Class$1060.91%
            
Expenses Paid, Amount $ 106            
Expense Ratio, Percent 0.91%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund Y Class returned 32.21% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
Y Class32.21%2.92%6.42%4/10/17
MSCI Emerging Markets29.51%5.06%6.74%—
            
Performance Inception Date           Apr. 10, 2017  
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1751.51%
            
Expenses Paid, Amount $ 175            
Expense Ratio, Percent 1.51%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund A Class returned 31.45% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class31.45%2.31%6.73%
A Class - with sales charge23.89%1.10%6.10%
MSCI Emerging Markets29.51%5.06%7.85%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2602.26%
            
Expenses Paid, Amount $ 260            
Expense Ratio, Percent 2.26%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund C Class returned 30.43% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class30.43%1.54%5.93%
MSCI Emerging Markets29.51%5.06%7.85%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$2031.76%
            
Expenses Paid, Amount $ 203            
Expense Ratio, Percent 1.76%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund R Class returned 31.11% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class31.11%2.05%6.46%
MSCI Emerging Markets29.51%5.06%7.85%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$1231.06%
            
Expenses Paid, Amount $ 123            
Expense Ratio, Percent 1.06%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund R5 Class returned 32.10% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R5 Class32.10%2.77%6.26%4/10/17
MSCI Emerging Markets29.51%5.06%6.74%—
            
Performance Inception Date           Apr. 10, 2017  
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$1060.91%
            
Expenses Paid, Amount $ 106            
Expense Ratio, Percent 0.91%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund R6 Class returned 32.18% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R6 Class32.18%2.91%7.36%
MSCI Emerging Markets29.51%5.06%7.85%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Emerging Markets Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$10.01%
            
Expenses Paid, Amount $ 1            
Expense Ratio, Percent 0.01%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Emerging Markets Fund G Class returned 33.39% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI Emerging Markets Index.
•
The information technology sector was the leading contributor to relative performance amid continued artificial intelligence (AI)-related demand. In the electronic equipment, instruments and components industry, advanced printed circuit board supplier Gold Circuit Electronics was a contributor. The industrials sector was another source of strength.
•
Notable individual contributors included Zhongji Innolight, a supplier of high-end optical transceivers for AI data centers and 5G networks, and HD Hyundai Electric, an electrical equipment manufacturer. Delta Electronics, a supplier of power and automation solutions, also helped.
•
The consumer discretionary sector detracted from relative performance. In the hotels, restaurants and leisure industry, MakeMyTrip, a large online travel services provider in India, was a source of weakness. The health care sector also detracted.
•
Other individual detractors included e-commerce platform Alibaba Group Holding and DLF, the India-based real estate developer. Sun Pharmaceutical Industries, the India-based drug manufacturer, also hurt results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 1, 2022 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class33.39%8.06%4/1/22
MSCI Emerging Markets29.51%7.65%—
            
Performance Inception Date   Apr. 01, 2022          
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883 $ 1,716,037,883
Holdings Count | holding 82 82 82 82 82 82 82
Advisory Fees Paid, Amount $ 11,332,012            
Investment Company, Portfolio Turnover 58.00%            
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%China25%
Short-Term Investments2.5%Taiwan19%
Other Assets and Liabilities(0.9)%India14%
 South Korea12%
 Brazil7%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1171.10%
            
Expenses Paid, Amount $ 117            
Expense Ratio, Percent 1.10%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund Investor Class returned 13.25% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class13.25%7.59%10.83%
MSCI ACWI18.21%11.97%11.41%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$960.90%
            
Expenses Paid, Amount $ 96            
Expense Ratio, Percent 0.90%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund I Class returned 13.44% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class13.44%7.80%11.05%
MSCI ACWI18.21%11.97%11.41%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Y Class$800.75%
            
Expenses Paid, Amount $ 80            
Expense Ratio, Percent 0.75%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund Y Class returned 13.68% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
Y Class13.68%7.97%12.25%4/10/17
MSCI ACWI18.21%11.97%11.72%—
            
Performance Inception Date           Apr. 10, 2017  
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1441.35%
            
Expenses Paid, Amount $ 144            
Expense Ratio, Percent 1.35%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund A Class returned 13.00% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class13.00%7.34%10.56%
A Class - with sales charge6.50%6.07%9.91%
MSCI ACWI18.21%11.97%11.41%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2232.10%
            
Expenses Paid, Amount $ 223            
Expense Ratio, Percent 2.10%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund C Class returned 12.17% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class12.17%6.53%9.74%
MSCI ACWI18.21%11.97%11.41%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1701.60%
            
Expenses Paid, Amount $ 170            
Expense Ratio, Percent 1.60%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund R Class returned 12.72% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class12.72%7.07%10.28%
MSCI ACWI18.21%11.97%11.41%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$960.90%
            
Expenses Paid, Amount $ 96            
Expense Ratio, Percent 0.90%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund R5 Class returned 13.52% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R5 Class13.52%7.82%12.09%4/10/17
MSCI ACWI18.21%11.97%11.72%—
            
Performance Inception Date           Apr. 10, 2017  
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused Global Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$800.75%
            
Expenses Paid, Amount $ 80            
Expense Ratio, Percent 0.75%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused Global Growth Fund R6 Class returned 13.71% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Index.
•
The industrials sector was the leading detractor from relative performance. Inside the electrical equipment industry, Schneider Electric, which provides products and solutions in energy management and digital transformation, hurt results. The financials sector also detracted.
•
Other notable detractors included Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, and Techtronic Industries, a designer and manufacturer of power tools. Roper Technologies, a provider of niche solutions and software for industrial end markets, also dragged on relative performance.
•
Not owning anything in the consumer staples sector was the biggest contributor to relative performance. The energy sector also contributed.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Broadcom, a semiconductor and networking solutions firm. Howmet Aerospace, a maker of parts for transportation and defense industries, benefited relative performance as well.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R6 Class13.71%7.97%11.22%
MSCI ACWI18.21%11.97%11.41%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864 $ 635,014,864
Holdings Count | holding 37 37 37 37 37 37 37
Advisory Fees Paid, Amount $ 6,448,400            
Investment Company, Portfolio Turnover 68.00%            
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%United States68%
Short-Term Investments1.0%France7%
Other Assets and Liabilities0.0%United Kingdom7%
 Hong Kong4%
 Taiwan4%
            
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 annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1161.10%
            
Expenses Paid, Amount $ 116            
Expense Ratio, Percent 1.10%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused International Growth Fund Investor Class returned 10.96% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI ACWI ex USA Index.
•
The consumer discretionary sector was the leading detractor from relative performance. In the specialty retail industry, Zalando, a Germany-based online retailer, was a notable drag on performance. The industrials sector also detracted from results.
•
Other notable individual detractors included MakeMyTrip, an India-based largest online travel services provider, and Terumo, a Japan-based medical device company. Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, was another area of weakness.
•
The energy sector was a leading contributor to results. In the oil, gas and consumable fuels industry, a position in TC Energy, a Canadian energy infrastructure services company, helped, as did not owning other companies. The communication services and real estate sectors also contributed.
•
Other notable individual contributors included NEC, the Japan-based information technology company, and Societe Generale, the France-based investment bank. Owning Siemens Energy, the Germany-based energy company, also helped results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
Investor Class10.96%1.35%7.63%3/29/16
MSCI ACWI ex USA26.04%8.41%8.61%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463
Holdings Count | holding 47 47 47 47 47 47 47
Advisory Fees Paid, Amount $ 445,829            
Investment Company, Portfolio Turnover 90.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.6%Japan16%
Short-Term Investments5.4%France15%
Other Assets and Liabilities(3.0)%United Kingdom9%
 China7%
 Taiwan7%
            
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 annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$950.90%
            
Expenses Paid, Amount $ 95            
Expense Ratio, Percent 0.90%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused International Growth Fund I Class returned 11.14% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI ACWI ex USA Index.
•
The consumer discretionary sector was the leading detractor from relative performance. In the specialty retail industry, Zalando, a Germany-based online retailer, was a notable drag on performance. The industrials sector also detracted from results.
•
Other notable individual detractors included MakeMyTrip, an India-based largest online travel services provider, and Terumo, a Japan-based medical device company. Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, was another area of weakness.
•
The energy sector was a leading contributor to results. In the oil, gas and consumable fuels industry, a position in TC Energy, a Canadian energy infrastructure services company, helped, as did not owning other companies. The communication services and real estate sectors also contributed.
•
Other notable individual contributors included NEC, the Japan-based information technology company, and Societe Generale, the France-based investment bank. Owning Siemens Energy, the Germany-based energy company, also helped results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
I Class11.14%1.54%7.84%3/29/16
MSCI ACWI ex USA26.04%8.41%8.61%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463
Holdings Count | holding 47 47 47 47 47 47 47
Advisory Fees Paid, Amount $ 445,829            
Investment Company, Portfolio Turnover 90.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.6%Japan16%
Short-Term Investments5.4%France15%
Other Assets and Liabilities(3.0)%United Kingdom9%
 China7%
 Taiwan7%
            
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 annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1421.35%
            
Expenses Paid, Amount $ 142            
Expense Ratio, Percent 1.35%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused International Growth Fund A Class returned 10.68% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI ACWI ex USA Index.
•
The consumer discretionary sector was the leading detractor from relative performance. In the specialty retail industry, Zalando, a Germany-based online retailer, was a notable drag on performance. The industrials sector also detracted from results.
•
Other notable individual detractors included MakeMyTrip, an India-based largest online travel services provider, and Terumo, a Japan-based medical device company. Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, was another area of weakness.
•
The energy sector was a leading contributor to results. In the oil, gas and consumable fuels industry, a position in TC Energy, a Canadian energy infrastructure services company, helped, as did not owning other companies. The communication services and real estate sectors also contributed.
•
Other notable individual contributors included NEC, the Japan-based information technology company, and Societe Generale, the France-based investment bank. Owning Siemens Energy, the Germany-based energy company, also helped results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
A Class10.68%1.09%7.36%3/29/16
A Class - with sales charge4.32%-0.10%6.70%3/29/16
MSCI ACWI ex USA26.04%8.41%8.61%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463
Holdings Count | holding 47 47 47 47 47 47 47
Advisory Fees Paid, Amount $ 445,829            
Investment Company, Portfolio Turnover 90.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.6%Japan16%
Short-Term Investments5.4%France15%
Other Assets and Liabilities(3.0)%United Kingdom9%
 China7%
 Taiwan7%
            
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 annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2202.10%
            
Expenses Paid, Amount $ 220            
Expense Ratio, Percent 2.10%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused International Growth Fund C Class returned 9.91% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI ACWI ex USA Index.
•
The consumer discretionary sector was the leading detractor from relative performance. In the specialty retail industry, Zalando, a Germany-based online retailer, was a notable drag on performance. The industrials sector also detracted from results.
•
Other notable individual detractors included MakeMyTrip, an India-based largest online travel services provider, and Terumo, a Japan-based medical device company. Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, was another area of weakness.
•
The energy sector was a leading contributor to results. In the oil, gas and consumable fuels industry, a position in TC Energy, a Canadian energy infrastructure services company, helped, as did not owning other companies. The communication services and real estate sectors also contributed.
•
Other notable individual contributors included NEC, the Japan-based information technology company, and Societe Generale, the France-based investment bank. Owning Siemens Energy, the Germany-based energy company, also helped results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
C Class9.91%0.34%6.56%3/29/16
MSCI ACWI ex USA26.04%8.41%8.61%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463
Holdings Count | holding 47 47 47 47 47 47 47
Advisory Fees Paid, Amount $ 445,829            
Investment Company, Portfolio Turnover 90.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.6%Japan16%
Short-Term Investments5.4%France15%
Other Assets and Liabilities(3.0)%United Kingdom9%
 China7%
 Taiwan7%
            
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 annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1681.60%
            
Expenses Paid, Amount $ 168            
Expense Ratio, Percent 1.60%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused International Growth Fund R Class returned 10.41% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI ACWI ex USA Index.
•
The consumer discretionary sector was the leading detractor from relative performance. In the specialty retail industry, Zalando, a Germany-based online retailer, was a notable drag on performance. The industrials sector also detracted from results.
•
Other notable individual detractors included MakeMyTrip, an India-based largest online travel services provider, and Terumo, a Japan-based medical device company. Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, was another area of weakness.
•
The energy sector was a leading contributor to results. In the oil, gas and consumable fuels industry, a position in TC Energy, a Canadian energy infrastructure services company, helped, as did not owning other companies. The communication services and real estate sectors also contributed.
•
Other notable individual contributors included NEC, the Japan-based information technology company, and Societe Generale, the France-based investment bank. Owning Siemens Energy, the Germany-based energy company, also helped results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R Class10.41%0.84%7.09%3/29/16
MSCI ACWI ex USA26.04%8.41%8.61%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463
Holdings Count | holding 47 47 47 47 47 47 47
Advisory Fees Paid, Amount $ 445,829            
Investment Company, Portfolio Turnover 90.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.6%Japan16%
Short-Term Investments5.4%France15%
Other Assets and Liabilities(3.0)%United Kingdom9%
 China7%
 Taiwan7%
            
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 annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$790.75%
            
Expenses Paid, Amount $ 79            
Expense Ratio, Percent 0.75%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused International Growth Fund R6 Class returned 11.29% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI ACWI ex USA Index.
•
The consumer discretionary sector was the leading detractor from relative performance. In the specialty retail industry, Zalando, a Germany-based online retailer, was a notable drag on performance. The industrials sector also detracted from results.
•
Other notable individual detractors included MakeMyTrip, an India-based largest online travel services provider, and Terumo, a Japan-based medical device company. Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, was another area of weakness.
•
The energy sector was a leading contributor to results. In the oil, gas and consumable fuels industry, a position in TC Energy, a Canadian energy infrastructure services company, helped, as did not owning other companies. The communication services and real estate sectors also contributed.
•
Other notable individual contributors included NEC, the Japan-based information technology company, and Societe Generale, the France-based investment bank. Owning Siemens Energy, the Germany-based energy company, also helped results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R6 Class11.29%1.70%8.00%3/29/16
MSCI ACWI ex USA26.04%8.41%8.61%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463
Holdings Count | holding 47 47 47 47 47 47 47
Advisory Fees Paid, Amount $ 445,829            
Investment Company, Portfolio Turnover 90.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.6%Japan16%
Short-Term Investments5.4%France15%
Other Assets and Liabilities(3.0)%United Kingdom9%
 China7%
 Taiwan7%
            
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 annual shareholder report contains important information about Focused International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$10.01%
            
Expenses Paid, Amount $ 1            
Expense Ratio, Percent 0.01%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Focused International Growth Fund G Class returned 12.15% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI ACWI ex USA Index.
•
The consumer discretionary sector was the leading detractor from relative performance. In the specialty retail industry, Zalando, a Germany-based online retailer, was a notable drag on performance. The industrials sector also detracted from results.
•
Other notable individual detractors included MakeMyTrip, an India-based largest online travel services provider, and Terumo, a Japan-based medical device company. Bank Central Asia, an Indonesia-based provider of commercial banking and financial services, was another area of weakness.
•
The energy sector was a leading contributor to results. In the oil, gas and consumable fuels industry, a position in TC Energy, a Canadian energy infrastructure services company, helped, as did not owning other companies. The communication services and real estate sectors also contributed.
•
Other notable individual contributors included NEC, the Japan-based information technology company, and Societe Generale, the France-based investment bank. Owning Siemens Energy, the Germany-based energy company, also helped results.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 1, 2019 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
G Class12.15%2.45%8.09%4/1/19
MSCI ACWI ex USA26.04%8.41%8.39%—
            
Performance Inception Date       Apr. 01, 2019      
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463 $ 156,951,463
Holdings Count | holding 47 47 47 47 47 47 47
Advisory Fees Paid, Amount $ 445,829            
Investment Company, Portfolio Turnover 90.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.6%Japan16%
Short-Term Investments5.4%France15%
Other Assets and Liabilities(3.0)%United Kingdom9%
 China7%
 Taiwan7%
            
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 annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1141.11%
            
Expenses Paid, Amount $ 114            
Expense Ratio, Percent 1.11%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Small Cap Fund Investor Class returned 4.76% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Small Cap Index.
•
The information technology sector was the biggest drag on relative performance, with software serving as a particular area of weakness. Docebo, an artificial intelligence-powered platform for online learning, and Q2 Holdings, a provider of virtual banking solutions, hurt results. The financials sector also detracted.
•
Other notable individual detractors included Triumph Financial, a U.S.-based regional bank, and Freshpet, the pet food company. RH, the home furnishings retailer, also dragged on results.
•
The consumer discretionary sector contributed to relative performance. Ryohin Keikaku, a Japan-based retailer of household products, was a notable contributor inside the broadline retail industry. The energy sector also contributed.
•
Other notable individual contributors included Lundin Gold, a Canada-based gold mining company, and BPER Banca, an Italian financial services firm. Aritzia, a Canadian retailer focused on women's attire, also acted as a source of strength.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
Investor Class4.76%4.51%11.90%3/29/16
Regulatory Index
MSCI ACWI18.21%11.97%12.10%—
Performance Index
MSCI ACWI Small Cap12.34%8.64%9.59%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212
Holdings Count | holding 130 130 130 130 130 130 130
Advisory Fees Paid, Amount $ 822,372            
Investment Company, Portfolio Turnover 140.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks109.6%United States53%
Exchange-Traded Funds0.0%Canada14%
Short-Term Investments4.2%Japan13%
Other Assets and Liabilities(13.8)%Australia6%
 China3%
            
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 annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$930.91%
            
Expenses Paid, Amount $ 93            
Expense Ratio, Percent 0.91%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Small Cap Fund I Class returned 4.95% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Small Cap Index.
•
The information technology sector was the biggest drag on relative performance, with software serving as a particular area of weakness. Docebo, an artificial intelligence-powered platform for online learning, and Q2 Holdings, a provider of virtual banking solutions, hurt results. The financials sector also detracted.
•
Other notable individual detractors included Triumph Financial, a U.S.-based regional bank, and Freshpet, the pet food company. RH, the home furnishings retailer, also dragged on results.
•
The consumer discretionary sector contributed to relative performance. Ryohin Keikaku, a Japan-based retailer of household products, was a notable contributor inside the broadline retail industry. The energy sector also contributed.
•
Other notable individual contributors included Lundin Gold, a Canada-based gold mining company, and BPER Banca, an Italian financial services firm. Aritzia, a Canadian retailer focused on women's attire, also acted as a source of strength.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
I Class4.95%4.72%12.13%3/29/16
Regulatory Index
MSCI ACWI18.21%11.97%12.10%—
Performance Index
MSCI ACWI Small Cap12.34%8.64%9.59%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212
Holdings Count | holding 130 130 130 130 130 130 130
Advisory Fees Paid, Amount $ 822,372            
Investment Company, Portfolio Turnover 140.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks109.6%United States53%
Exchange-Traded Funds0.0%Canada14%
Short-Term Investments4.2%Japan13%
Other Assets and Liabilities(13.8)%Australia6%
 China3%
            
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 annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1391.36%
            
Expenses Paid, Amount $ 139            
Expense Ratio, Percent 1.36%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Small Cap Fund A Class returned 4.43% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Small Cap Index.
•
The information technology sector was the biggest drag on relative performance, with software serving as a particular area of weakness. Docebo, an artificial intelligence-powered platform for online learning, and Q2 Holdings, a provider of virtual banking solutions, hurt results. The financials sector also detracted.
•
Other notable individual detractors included Triumph Financial, a U.S.-based regional bank, and Freshpet, the pet food company. RH, the home furnishings retailer, also dragged on results.
•
The consumer discretionary sector contributed to relative performance. Ryohin Keikaku, a Japan-based retailer of household products, was a notable contributor inside the broadline retail industry. The energy sector also contributed.
•
Other notable individual contributors included Lundin Gold, a Canada-based gold mining company, and BPER Banca, an Italian financial services firm. Aritzia, a Canadian retailer focused on women's attire, also acted as a source of strength.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
A Class4.43%4.24%11.62%3/29/16
A Class - with sales charge-1.57%3.01%10.94%3/29/16
Regulatory Index
MSCI ACWI18.21%11.97%12.10%—
Performance Index
MSCI ACWI Small Cap12.34%8.64%9.59%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212
Holdings Count | holding 130 130 130 130 130 130 130
Advisory Fees Paid, Amount $ 822,372            
Investment Company, Portfolio Turnover 140.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks109.6%United States53%
Exchange-Traded Funds0.0%Canada14%
Short-Term Investments4.2%Japan13%
Other Assets and Liabilities(13.8)%Australia6%
 China3%
            
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 annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2152.11%
            
Expenses Paid, Amount $ 215            
Expense Ratio, Percent 2.11%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Small Cap Fund C Class returned 3.71% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Small Cap Index.
•
The information technology sector was the biggest drag on relative performance, with software serving as a particular area of weakness. Docebo, an artificial intelligence-powered platform for online learning, and Q2 Holdings, a provider of virtual banking solutions, hurt results. The financials sector also detracted.
•
Other notable individual detractors included Triumph Financial, a U.S.-based regional bank, and Freshpet, the pet food company. RH, the home furnishings retailer, also dragged on results.
•
The consumer discretionary sector contributed to relative performance. Ryohin Keikaku, a Japan-based retailer of household products, was a notable contributor inside the broadline retail industry. The energy sector also contributed.
•
Other notable individual contributors included Lundin Gold, a Canada-based gold mining company, and BPER Banca, an Italian financial services firm. Aritzia, a Canadian retailer focused on women's attire, also acted as a source of strength.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
C Class3.71%3.46%10.79%3/29/16
Regulatory Index
MSCI ACWI18.21%11.97%12.10%—
Performance Index
MSCI ACWI Small Cap12.34%8.64%9.59%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212
Holdings Count | holding 130 130 130 130 130 130 130
Advisory Fees Paid, Amount $ 822,372            
Investment Company, Portfolio Turnover 140.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks109.6%United States53%
Exchange-Traded Funds0.0%Canada14%
Short-Term Investments4.2%Japan13%
Other Assets and Liabilities(13.8)%Australia6%
 China3%
            
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 annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1641.61%
            
Expenses Paid, Amount $ 164            
Expense Ratio, Percent 1.61%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Small Cap Fund R Class returned 4.21% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Small Cap Index.
•
The information technology sector was the biggest drag on relative performance, with software serving as a particular area of weakness. Docebo, an artificial intelligence-powered platform for online learning, and Q2 Holdings, a provider of virtual banking solutions, hurt results. The financials sector also detracted.
•
Other notable individual detractors included Triumph Financial, a U.S.-based regional bank, and Freshpet, the pet food company. RH, the home furnishings retailer, also dragged on results.
•
The consumer discretionary sector contributed to relative performance. Ryohin Keikaku, a Japan-based retailer of household products, was a notable contributor inside the broadline retail industry. The energy sector also contributed.
•
Other notable individual contributors included Lundin Gold, a Canada-based gold mining company, and BPER Banca, an Italian financial services firm. Aritzia, a Canadian retailer focused on women's attire, also acted as a source of strength.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R Class4.21%3.98%11.34%3/29/16
Regulatory Index
MSCI ACWI18.21%11.97%12.10%—
Performance Index
MSCI ACWI Small Cap12.34%8.64%9.59%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212
Holdings Count | holding 130 130 130 130 130 130 130
Advisory Fees Paid, Amount $ 822,372            
Investment Company, Portfolio Turnover 140.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks109.6%United States53%
Exchange-Traded Funds0.0%Canada14%
Short-Term Investments4.2%Japan13%
Other Assets and Liabilities(13.8)%Australia6%
 China3%
            
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 annual shareholder report contains important information about Global Small Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$780.76%
            
Expenses Paid, Amount $ 78            
Expense Ratio, Percent 0.76%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Small Cap Fund R6 Class returned 5.07% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI Small Cap Index.
•
The information technology sector was the biggest drag on relative performance, with software serving as a particular area of weakness. Docebo, an artificial intelligence-powered platform for online learning, and Q2 Holdings, a provider of virtual banking solutions, hurt results. The financials sector also detracted.
•
Other notable individual detractors included Triumph Financial, a U.S.-based regional bank, and Freshpet, the pet food company. RH, the home furnishings retailer, also dragged on results.
•
The consumer discretionary sector contributed to relative performance. Ryohin Keikaku, a Japan-based retailer of household products, was a notable contributor inside the broadline retail industry. The energy sector also contributed.
•
Other notable individual contributors included Lundin Gold, a Canada-based gold mining company, and BPER Banca, an Italian financial services firm. Aritzia, a Canadian retailer focused on women's attire, also acted as a source of strength.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
March 29, 2016 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R6 Class5.07%4.87%12.29%3/29/16
Regulatory Index
MSCI ACWI18.21%11.97%12.10%—
Performance Index
MSCI ACWI Small Cap12.34%8.64%9.59%—
            
Performance Inception Date             Mar. 29, 2016
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212 $ 83,217,212
Holdings Count | holding 130 130 130 130 130 130 130
Advisory Fees Paid, Amount $ 822,372            
Investment Company, Portfolio Turnover 140.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks109.6%United States53%
Exchange-Traded Funds0.0%Canada14%
Short-Term Investments4.2%Japan13%
Other Assets and Liabilities(13.8)%Australia6%
 China3%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1281.21%
            
Expenses Paid, Amount $ 128            
Expense Ratio, Percent 1.21%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund Investor Class returned 10.88% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class10.88%2.28%5.90%
MSCI EAFE24.50%9.27%7.72%
MSCI EAFE Growth15.39%5.06%7.15%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$1071.01%
            
Expenses Paid, Amount $ 107            
Expense Ratio, Percent 1.01%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund I Class returned 11.14% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class11.14%2.49%6.12%
MSCI EAFE24.50%9.27%7.72%
MSCI EAFE Growth15.39%5.06%7.15%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Y Class$910.86%
            
Expenses Paid, Amount $ 91            
Expense Ratio, Percent 0.86%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund Y Class returned 11.32% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
Y Class11.32%2.64%7.18%4/10/17
MSCI EAFE24.50%9.27%8.22%—
MSCI EAFE Growth15.39%5.06%7.80%—
            
Performance Inception Date           Apr. 10, 2017  
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1541.46%
            
Expenses Paid, Amount $ 154            
Expense Ratio, Percent 1.46%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund A Class returned 10.63% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class10.63%2.02%5.64%
A Class - with sales charge4.27%0.82%5.02%
MSCI EAFE24.50%9.27%7.72%
MSCI EAFE Growth15.39%5.06%7.15%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2322.21%
            
Expenses Paid, Amount $ 232            
Expense Ratio, Percent 2.21%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund C Class returned 9.79% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class9.79%1.27%4.85%
MSCI EAFE24.50%9.27%7.72%
MSCI EAFE Growth15.39%5.06%7.15%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1801.71%
            
Expenses Paid, Amount $ 180            
Expense Ratio, Percent 1.71%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund R Class returned 10.37% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class10.37%1.77%5.38%
MSCI EAFE24.50%9.27%7.72%
MSCI EAFE Growth15.39%5.06%7.15%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$1071.01%
            
Expenses Paid, Amount $ 107            
Expense Ratio, Percent 1.01%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund R5 Class returned 11.13% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R5 Class11.13%2.49%7.02%4/10/17
MSCI EAFE24.50%9.27%8.22%—
MSCI EAFE Growth15.39%5.06%7.80%—
            
Performance Inception Date           Apr. 10, 2017  
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$910.86%
            
Expenses Paid, Amount $ 91            
Expense Ratio, Percent 0.86%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund R6 Class returned 11.34% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R6 Class11.34%2.63%6.27%
MSCI EAFE24.50%9.27%7.72%
MSCI EAFE Growth15.39%5.06%7.15%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Growth Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$20.02%
            
Expenses Paid, Amount $ 2            
Expense Ratio, Percent 0.02%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Growth Fund G Class returned 12.30% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Index.
•
The financials sector, which was an underweight in the portfolio, was the leading detractor from relative performance. In the banking industry, not owning firms such as Banco Santander, a financial services company, dragged on performance. Interest rate cuts in some markets were expected to spur credit demand, helping banks. The consumer discretionary sector also hurt results.
•
Notable individual detractors included Novo Nordisk, the Denmark-based drugmaker, and Keyence, the Japan-based factory automation firm. London Stock Exchange Group, a U.K.-based financial exchange and data and analytics company, also hurt results.
•
The energy sector was a contributor to relative performance. In the oil, gas and consumable fuels industry, not owning oil and gas companies like Shell and TotalEnergies benefited results.
•
Notable individual contributors included Societe Generale, the France-based investment bank, and Siemens Energy, the Germany-based energy company. A position in NEC, the Japan-based information technology company, also benefited relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 1, 2022 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class12.30%4.64%4/1/22
MSCI EAFE24.50%10.22%—
MSCI EAFE Growth15.39%6.36%—
            
Performance Inception Date   Apr. 01, 2022          
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611 $ 2,649,859,611
Holdings Count | holding 103 103 103 103 103 103 103
Advisory Fees Paid, Amount $ 14,810,162            
Investment Company, Portfolio Turnover 65.00%            
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%Japan19%
Short-Term Investments2.3%France17%
Other Assets and Liabilities(1.9)%United Kingdom15%
 Germany8%
 Switzerland7%
            
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 annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1631.46%
            
Expenses Paid, Amount $ 163            
Expense Ratio, Percent 1.46%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Opportunities Fund Investor Class returned 23.21% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Small Cap Growth Index.
•
The financials sector was the leading contributor to the portfolio's relative performance, with banks acting as a particular source of strength. Owning the National Bank of Greece, a portfolio-only holding, helped results. The materials sector also contributed.
•
Notable individual contributors included Lundin Gold, a Canadian gold mining company, and Hyundai Rotem, a South Korean manufacturer of railway rolling stock and defense equipment. Owning Tower Semiconductor, a maker of analog semiconductors, also helped.
•
The health care sector detracted from relative performance, with the biotechnology industry dragging on results. Positions in PeptiDream, which is developing peptide-based medicines, and Hugel, a South Korea-based medical aesthetics company, hurt. The energy sector also detracted.
•
Other notable detractors were Vista Energy, an oil and gas production company, and NEXTDC, an Australia-based operator of data centers. Redcare Pharmacy, the European online pharmacy retailer, was another source of weakness.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class23.21%2.13%6.46%
Regulatory Index
MSCI ACWI ex USA26.04%8.41%7.89%
Performance Index
MSCI ACWI ex USA Small Cap Growth21.83%5.22%7.34%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371
Holdings Count | holding 114 114 114 114 114 114 114
Advisory Fees Paid, Amount $ 6,669,139            
Investment Company, Portfolio Turnover 119.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.9%Japan20%
Exchange-Traded Funds0.0%Canada16%
Short-Term Investments4.0%Australia8%
Other Assets and Liabilities(2.9)%Taiwan6%
 India6%
            
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 annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$1411.26%
            
Expenses Paid, Amount $ 141            
Expense Ratio, Percent 1.26%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Opportunities Fund I Class returned 23.53% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Small Cap Growth Index.
•
The financials sector was the leading contributor to the portfolio's relative performance, with banks acting as a particular source of strength. Owning the National Bank of Greece, a portfolio-only holding, helped results. The materials sector also contributed.
•
Notable individual contributors included Lundin Gold, a Canadian gold mining company, and Hyundai Rotem, a South Korean manufacturer of railway rolling stock and defense equipment. Owning Tower Semiconductor, a maker of analog semiconductors, also helped.
•
The health care sector detracted from relative performance, with the biotechnology industry dragging on results. Positions in PeptiDream, which is developing peptide-based medicines, and Hugel, a South Korea-based medical aesthetics company, hurt. The energy sector also detracted.
•
Other notable detractors were Vista Energy, an oil and gas production company, and NEXTDC, an Australia-based operator of data centers. Redcare Pharmacy, the European online pharmacy retailer, was another source of weakness.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class23.53%2.34%6.67%
Regulatory Index
MSCI ACWI ex USA26.04%8.41%7.89%
Performance Index
MSCI ACWI ex USA Small Cap Growth21.83%5.22%7.34%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371
Holdings Count | holding 114 114 114 114 114 114 114
Advisory Fees Paid, Amount $ 6,669,139            
Investment Company, Portfolio Turnover 119.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.9%Japan20%
Exchange-Traded Funds0.0%Canada16%
Short-Term Investments4.0%Australia8%
Other Assets and Liabilities(2.9)%Taiwan6%
 India6%
            
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 annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1911.71%
            
Expenses Paid, Amount $ 191            
Expense Ratio, Percent 1.71%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Opportunities Fund A Class returned 22.89% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Small Cap Growth Index.
•
The financials sector was the leading contributor to the portfolio's relative performance, with banks acting as a particular source of strength. Owning the National Bank of Greece, a portfolio-only holding, helped results. The materials sector also contributed.
•
Notable individual contributors included Lundin Gold, a Canadian gold mining company, and Hyundai Rotem, a South Korean manufacturer of railway rolling stock and defense equipment. Owning Tower Semiconductor, a maker of analog semiconductors, also helped.
•
The health care sector detracted from relative performance, with the biotechnology industry dragging on results. Positions in PeptiDream, which is developing peptide-based medicines, and Hugel, a South Korea-based medical aesthetics company, hurt. The energy sector also detracted.
•
Other notable detractors were Vista Energy, an oil and gas production company, and NEXTDC, an Australia-based operator of data centers. Redcare Pharmacy, the European online pharmacy retailer, was another source of weakness.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class22.89%1.87%6.19%
A Class - with sales charge15.82%0.67%5.56%
Regulatory Index
MSCI ACWI ex USA26.04%8.41%7.89%
Performance Index
MSCI ACWI ex USA Small Cap Growth21.83%5.22%7.34%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371
Holdings Count | holding 114 114 114 114 114 114 114
Advisory Fees Paid, Amount $ 6,669,139            
Investment Company, Portfolio Turnover 119.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.9%Japan20%
Exchange-Traded Funds0.0%Canada16%
Short-Term Investments4.0%Australia8%
Other Assets and Liabilities(2.9)%Taiwan6%
 India6%
            
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 annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2732.46%
            
Expenses Paid, Amount $ 273            
Expense Ratio, Percent 2.46%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Opportunities Fund C Class returned 21.96% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Small Cap Growth Index.
•
The financials sector was the leading contributor to the portfolio's relative performance, with banks acting as a particular source of strength. Owning the National Bank of Greece, a portfolio-only holding, helped results. The materials sector also contributed.
•
Notable individual contributors included Lundin Gold, a Canadian gold mining company, and Hyundai Rotem, a South Korean manufacturer of railway rolling stock and defense equipment. Owning Tower Semiconductor, a maker of analog semiconductors, also helped.
•
The health care sector detracted from relative performance, with the biotechnology industry dragging on results. Positions in PeptiDream, which is developing peptide-based medicines, and Hugel, a South Korea-based medical aesthetics company, hurt. The energy sector also detracted.
•
Other notable detractors were Vista Energy, an oil and gas production company, and NEXTDC, an Australia-based operator of data centers. Redcare Pharmacy, the European online pharmacy retailer, was another source of weakness.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class21.96%1.12%5.40%
Regulatory Index
MSCI ACWI ex USA26.04%8.41%7.89%
Performance Index
MSCI ACWI ex USA Small Cap Growth21.83%5.22%7.34%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371
Holdings Count | holding 114 114 114 114 114 114 114
Advisory Fees Paid, Amount $ 6,669,139            
Investment Company, Portfolio Turnover 119.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.9%Japan20%
Exchange-Traded Funds0.0%Canada16%
Short-Term Investments4.0%Australia8%
Other Assets and Liabilities(2.9)%Taiwan6%
 India6%
            
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 annual shareholder report contains important information about International Opportunities Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$2181.96%
            
Expenses Paid, Amount $ 218            
Expense Ratio, Percent 1.96%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Opportunities Fund R Class returned 22.65% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Small Cap Growth Index.
•
The financials sector was the leading contributor to the portfolio's relative performance, with banks acting as a particular source of strength. Owning the National Bank of Greece, a portfolio-only holding, helped results. The materials sector also contributed.
•
Notable individual contributors included Lundin Gold, a Canadian gold mining company, and Hyundai Rotem, a South Korean manufacturer of railway rolling stock and defense equipment. Owning Tower Semiconductor, a maker of analog semiconductors, also helped.
•
The health care sector detracted from relative performance, with the biotechnology industry dragging on results. Positions in PeptiDream, which is developing peptide-based medicines, and Hugel, a South Korea-based medical aesthetics company, hurt. The energy sector also detracted.
•
Other notable detractors were Vista Energy, an oil and gas production company, and NEXTDC, an Australia-based operator of data centers. Redcare Pharmacy, the European online pharmacy retailer, was another source of weakness.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class22.65%1.62%5.93%
Regulatory Index
MSCI ACWI ex USA26.04%8.41%7.89%
Performance Index
MSCI ACWI ex USA Small Cap Growth21.83%5.22%7.34%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371 $ 504,538,371
Holdings Count | holding 114 114 114 114 114 114 114
Advisory Fees Paid, Amount $ 6,669,139            
Investment Company, Portfolio Turnover 119.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.9%Japan20%
Exchange-Traded Funds0.0%Canada16%
Short-Term Investments4.0%Australia8%
Other Assets and Liabilities(2.9)%Taiwan6%
 India6%
            
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 annual shareholder report contains important information about International Small-Mid Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1551.42%
            
Expenses Paid, Amount $ 155            
Expense Ratio, Percent 1.42%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Small-Mid Cap Fund Investor Class returned 18.13% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Small Cap Index.
•
The industrials sector was the leading detractor from relative performance. Inside the machinery industry, firms like Sulzer, a Switzerland-based firm that offers technology and services in fluid engineering, and Miura, a Japan-based producer of boilers and other energy conservation products, dragged. The information technology sector also weighed on results.
•
Other notable individual detractors included NEXTDC, an Australia-based data center operator, and Similarweb, a provider of web and app analytics. Redcare Pharmacy, a European web-based pharmacy, also hurt.
•
The consumer discretionary sector contributed to relative performance. Inside the specialty retail industry, Aritzia, a Canada-based retailer of women's clothing that is speeding up a U.S. expansion, supported results.
•
Other notable individual contributors included Tower Semiconductor, a maker of analog semiconductors, and BPER Banca, an Italy-based financial services firm. Ryohin Keikaku, a Japanese household products retailer, also helped relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class18.13%2.90%6.20%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Small Cap25.94%6.55%7.33%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539
Holdings Count | holding 117 117 117 117 117 117 117
Advisory Fees Paid, Amount $ 1,265,907            
Investment Company, Portfolio Turnover 128.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.9%Japan34%
Exchange-Traded Funds0.7%Australia10%
Short-Term Investments6.4%Canada10%
Other Assets and Liabilities(5.0)%United Kingdom10%
 Israel5%
            
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 annual shareholder report contains important information about International Small-Mid Cap Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$20.02%
            
Expenses Paid, Amount $ 2            
Expense Ratio, Percent 0.02%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Small-Mid Cap Fund G Class returned 19.86% for the reporting period ended November 30, 2025.
The fund seeks capital growth. The commentary below refers to the fund's performance compared to the MSCI EAFE Small Cap Index.
•
The industrials sector was the leading detractor from relative performance. Inside the machinery industry, firms like Sulzer, a Switzerland-based firm that offers technology and services in fluid engineering, and Miura, a Japan-based producer of boilers and other energy conservation products, dragged. The information technology sector also weighed on results.
•
Other notable individual detractors included NEXTDC, an Australia-based data center operator, and Similarweb, a provider of web and app analytics. Redcare Pharmacy, a European web-based pharmacy, also hurt.
•
The consumer discretionary sector contributed to relative performance. Inside the specialty retail industry, Aritzia, a Canada-based retailer of women's clothing that is speeding up a U.S. expansion, supported results.
•
Other notable individual contributors included Tower Semiconductor, a maker of analog semiconductors, and BPER Banca, an Italy-based financial services firm. Ryohin Keikaku, a Japanese household products retailer, also helped relative performance.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
G Class19.86%4.40%7.52%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Small Cap25.94%6.55%7.33%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539 $ 501,504,539
Holdings Count | holding 117 117 117 117 117 117 117
Advisory Fees Paid, Amount $ 1,265,907            
Investment Company, Portfolio Turnover 128.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks97.9%Japan34%
Exchange-Traded Funds0.7%Australia10%
Short-Term Investments6.4%Canada10%
Other Assets and Liabilities(5.0)%United Kingdom10%
 Israel5%
            
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 annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1311.12%
            
Expenses Paid, Amount $ 131            
Expense Ratio, Percent 1.12%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Value Fund Investor Class returned 33.75% for the reporting period ended November 30, 2025.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance relative to the MSCI EAFE Value Index.
•
Positioning in the financials sector contributed most to performance, led by selection and allocation decisions among banks. The majority of the top-10 individual contributors for the period were European-based banks, which benefited from comparatively attractive valuations and net interest margins, steady loan growth and still-solid credit trends.
•
The materials sector was another source of strength, led by positioning and stock choices in the construction materials and chemicals industries, respectively. Heidelberg Materials was the leading contributor, as it saw increased demand resulting from greater emphasis on more sustainable building products in Europe. Our chemicals holdings benefited from strong global fertilizer pricing.
•
Health care stocks were the leading detractors from performance, reflecting an overweight allocation and stock choices in the pharmaceuticals industry. These stocks were hurt by worries about drug pricing pressure and threatened tariffs from the Trump administration.
•
Elsewhere, the industrials and communication services sectors were modest detractors. Stock choices and underweight allocations to industrial conglomerates and construction and engineering companies hurt relative results. In communication services, some large diversified telecommunication holdings weighed on performance amid worries about large capital outlays and currency volatility.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class33.75%11.69%7.25%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Value34.10%13.42%8.03%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747
Holdings Count | holding 157 157 157 157 157 157 157
Advisory Fees Paid, Amount $ 2,811,703            
Investment Company, Portfolio Turnover 79.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan22%
Short-Term Investments0.9%United Kingdom18%
Other Assets and Liabilities0.6%France9%
 Switzerland7%
 Germany7%
            
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 annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$1080.92%
            
Expenses Paid, Amount $ 108            
Expense Ratio, Percent 0.92%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Value Fund I Class returned 34.11% for the reporting period ended November 30, 2025.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance relative to the MSCI EAFE Value Index.
•
Positioning in the financials sector contributed most to performance, led by selection and allocation decisions among banks. The majority of the top-10 individual contributors for the period were European-based banks, which benefited from comparatively attractive valuations and net interest margins, steady loan growth and still-solid credit trends.
•
The materials sector was another source of strength, led by positioning and stock choices in the construction materials and chemicals industries, respectively. Heidelberg Materials was the leading contributor, as it saw increased demand resulting from greater emphasis on more sustainable building products in Europe. Our chemicals holdings benefited from strong global fertilizer pricing.
•
Health care stocks were the leading detractors from performance, reflecting an overweight allocation and stock choices in the pharmaceuticals industry. These stocks were hurt by worries about drug pricing pressure and threatened tariffs from the Trump administration.
•
Elsewhere, the industrials and communication services sectors were modest detractors. Stock choices and underweight allocations to industrial conglomerates and construction and engineering companies hurt relative results. In communication services, some large diversified telecommunication holdings weighed on performance amid worries about large capital outlays and currency volatility.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class34.11%11.90%7.46%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Value34.10%13.42%8.03%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747
Holdings Count | holding 157 157 157 157 157 157 157
Advisory Fees Paid, Amount $ 2,811,703            
Investment Company, Portfolio Turnover 79.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan22%
Short-Term Investments0.9%United Kingdom18%
Other Assets and Liabilities0.6%France9%
 Switzerland7%
 Germany7%
            
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 annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1601.37%
            
Expenses Paid, Amount $ 160            
Expense Ratio, Percent 1.37%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Value Fund A Class returned 33.44% for the reporting period ended November 30, 2025.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance relative to the MSCI EAFE Value Index.
•
Positioning in the financials sector contributed most to performance, led by selection and allocation decisions among banks. The majority of the top-10 individual contributors for the period were European-based banks, which benefited from comparatively attractive valuations and net interest margins, steady loan growth and still-solid credit trends.
•
The materials sector was another source of strength, led by positioning and stock choices in the construction materials and chemicals industries, respectively. Heidelberg Materials was the leading contributor, as it saw increased demand resulting from greater emphasis on more sustainable building products in Europe. Our chemicals holdings benefited from strong global fertilizer pricing.
•
Health care stocks were the leading detractors from performance, reflecting an overweight allocation and stock choices in the pharmaceuticals industry. These stocks were hurt by worries about drug pricing pressure and threatened tariffs from the Trump administration.
•
Elsewhere, the industrials and communication services sectors were modest detractors. Stock choices and underweight allocations to industrial conglomerates and construction and engineering companies hurt relative results. In communication services, some large diversified telecommunication holdings weighed on performance amid worries about large capital outlays and currency volatility.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015, through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class33.44%11.42%6.98%
A Class - with sales charge25.77%10.10%6.35%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Value34.10%13.42%8.03%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747
Holdings Count | holding 157 157 157 157 157 157 157
Advisory Fees Paid, Amount $ 2,811,703            
Investment Company, Portfolio Turnover 79.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan22%
Short-Term Investments0.9%United Kingdom18%
Other Assets and Liabilities0.6%France9%
 Switzerland7%
 Germany7%
            
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 annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2472.12%
            
Expenses Paid, Amount $ 247            
Expense Ratio, Percent 2.12%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Value Fund C Class returned 32.56% for the reporting period ended November 30, 2025.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance relative to the MSCI EAFE Value Index.
•
Positioning in the financials sector contributed most to performance, led by selection and allocation decisions among banks. The majority of the top-10 individual contributors for the period were European-based banks, which benefited from comparatively attractive valuations and net interest margins, steady loan growth and still-solid credit trends.
•
The materials sector was another source of strength, led by positioning and stock choices in the construction materials and chemicals industries, respectively. Heidelberg Materials was the leading contributor, as it saw increased demand resulting from greater emphasis on more sustainable building products in Europe. Our chemicals holdings benefited from strong global fertilizer pricing.
•
Health care stocks were the leading detractors from performance, reflecting an overweight allocation and stock choices in the pharmaceuticals industry. These stocks were hurt by worries about drug pricing pressure and threatened tariffs from the Trump administration.
•
Elsewhere, the industrials and communication services sectors were modest detractors. Stock choices and underweight allocations to industrial conglomerates and construction and engineering companies hurt relative results. In communication services, some large diversified telecommunication holdings weighed on performance amid worries about large capital outlays and currency volatility.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class32.56%10.58%6.19%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Value34.10%13.42%8.03%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747
Holdings Count | holding 157 157 157 157 157 157 157
Advisory Fees Paid, Amount $ 2,811,703            
Investment Company, Portfolio Turnover 79.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan22%
Short-Term Investments0.9%United Kingdom18%
Other Assets and Liabilities0.6%France9%
 Switzerland7%
 Germany7%
            
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 annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1891.62%
            
Expenses Paid, Amount $ 189            
Expense Ratio, Percent 1.62%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Value Fund R Class returned 33.06% for the reporting period ended November 30, 2025.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance relative to the MSCI EAFE Value Index.
•
Positioning in the financials sector contributed most to performance, led by selection and allocation decisions among banks. The majority of the top-10 individual contributors for the period were European-based banks, which benefited from comparatively attractive valuations and net interest margins, steady loan growth and still-solid credit trends.
•
The materials sector was another source of strength, led by positioning and stock choices in the construction materials and chemicals industries, respectively. Heidelberg Materials was the leading contributor, as it saw increased demand resulting from greater emphasis on more sustainable building products in Europe. Our chemicals holdings benefited from strong global fertilizer pricing.
•
Health care stocks were the leading detractors from performance, reflecting an overweight allocation and stock choices in the pharmaceuticals industry. These stocks were hurt by worries about drug pricing pressure and threatened tariffs from the Trump administration.
•
Elsewhere, the industrials and communication services sectors were modest detractors. Stock choices and underweight allocations to industrial conglomerates and construction and engineering companies hurt relative results. In communication services, some large diversified telecommunication holdings weighed on performance amid worries about large capital outlays and currency volatility.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class33.06%11.11%6.71%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Value34.10%13.42%8.03%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747
Holdings Count | holding 157 157 157 157 157 157 157
Advisory Fees Paid, Amount $ 2,811,703            
Investment Company, Portfolio Turnover 79.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan22%
Short-Term Investments0.9%United Kingdom18%
Other Assets and Liabilities0.6%France9%
 Switzerland7%
 Germany7%
            
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 annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$900.77%
            
Expenses Paid, Amount $ 90            
Expense Ratio, Percent 0.77%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Value Fund R6 Class returned 34.17% for the reporting period ended November 30, 2025.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance relative to the MSCI EAFE Value Index.
•
Positioning in the financials sector contributed most to performance, led by selection and allocation decisions among banks. The majority of the top-10 individual contributors for the period were European-based banks, which benefited from comparatively attractive valuations and net interest margins, steady loan growth and still-solid credit trends.
•
The materials sector was another source of strength, led by positioning and stock choices in the construction materials and chemicals industries, respectively. Heidelberg Materials was the leading contributor, as it saw increased demand resulting from greater emphasis on more sustainable building products in Europe. Our chemicals holdings benefited from strong global fertilizer pricing.
•
Health care stocks were the leading detractors from performance, reflecting an overweight allocation and stock choices in the pharmaceuticals industry. These stocks were hurt by worries about drug pricing pressure and threatened tariffs from the Trump administration.
•
Elsewhere, the industrials and communication services sectors were modest detractors. Stock choices and underweight allocations to industrial conglomerates and construction and engineering companies hurt relative results. In communication services, some large diversified telecommunication holdings weighed on performance amid worries about large capital outlays and currency volatility.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
November 30, 2015 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R6 Class34.17%12.07%7.62%
Regulatory Index
MSCI EAFE24.50%9.27%7.72%
Performance Index
MSCI EAFE Value34.10%13.42%8.03%
            
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747
Holdings Count | holding 157 157 157 157 157 157 157
Advisory Fees Paid, Amount $ 2,811,703            
Investment Company, Portfolio Turnover 79.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan22%
Short-Term Investments0.9%United Kingdom18%
Other Assets and Liabilities0.6%France9%
 Switzerland7%
 Germany7%
            
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 annual shareholder report contains important information about International Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$20.02%
            
Expenses Paid, Amount $ 2            
Expense Ratio, Percent 0.02%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
International Value Fund G Class returned 35.29% for the reporting period ended November 30, 2025.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance relative to the MSCI EAFE Value Index.
•
Positioning in the financials sector contributed most to performance, led by selection and allocation decisions among banks. The majority of the top-10 individual contributors for the period were European-based banks, which benefited from comparatively attractive valuations and net interest margins, steady loan growth and still-solid credit trends.
•
The materials sector was another source of strength, led by positioning and stock choices in the construction materials and chemicals industries, respectively. Heidelberg Materials was the leading contributor, as it saw increased demand resulting from greater emphasis on more sustainable building products in Europe. Our chemicals holdings benefited from strong global fertilizer pricing.
•
Health care stocks were the leading detractors from performance, reflecting an overweight allocation and stock choices in the pharmaceuticals industry. These stocks were hurt by worries about drug pricing pressure and threatened tariffs from the Trump administration.
•
Elsewhere, the industrials and communication services sectors were modest detractors. Stock choices and underweight allocations to industrial conglomerates and construction and engineering companies hurt relative results. In communication services, some large diversified telecommunication holdings weighed on performance amid worries about large capital outlays and currency volatility.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 1, 2022 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 YearSince InceptionInception Date
G Class35.29%14.31%4/1/22
Regulatory Index
MSCI EAFE24.50%10.22%—
Performance Index
MSCI EAFE Value34.10%14.07%—
            
Performance Inception Date   Apr. 01, 2022          
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747 $ 1,431,274,747
Holdings Count | holding 157 157 157 157 157 157 157
Advisory Fees Paid, Amount $ 2,811,703            
Investment Company, Portfolio Turnover 79.00%            
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks98.5%Japan22%
Short-Term Investments0.9%United Kingdom18%
Other Assets and Liabilities0.6%France9%
 Switzerland7%
 Germany7%
            
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 annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1371.18%
            
Expenses Paid, Amount $ 137            
Expense Ratio, Percent 1.18%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Non-U.S. Intrinsic Value Fund Investor Class returned 31.67% for the reporting period ended November 30, 2025.
The fund seeks capital appreciation. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Index.
•
The fund’s stock selection in the financials sector was a significant contributor to performance during the period. While the fund is broadly underweight in the banking industry, select overweight positions that outperformed buoyed results. Fortuitous investment choices in the insurance industry also propelled performance.
•
Security selection in the health care sector aided performance. Holdings in the pharmaceuticals industry helped, both from avoiding exposure to certain benchmark names while taking overweight positions in others that outperformed. A lack of exposure to the health care equipment and supplies industry also contributed.
•
Security selection in the materials sector weighed on performance. A pair of holdings, one in the paper and forest products industry and the other in the chemicals industry, were the fund’s primary detractors in the materials sector.
•
Investment choices in the industrials sector hampered performance. A holding in the professional services industry weighed on results, as did a lack of exposure to the aerospace and defense industry.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
December 6, 2018 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
Investor Class31.67%11.35%7.05%12/6/18
MSCI ACWI ex USA26.04%8.41%9.37%—
            
Performance Inception Date         Dec. 06, 2018    
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705
Holdings Count | holding 58 58 58 58 58 58 58
Advisory Fees Paid, Amount $ 1,291,331            
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 Stocks98.3%United Kingdom30%
Short-Term Investments0.7%France19%
Other Assets and Liabilities1.0%Germany10%
 South Korea10%
 Netherlands6%
            
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 annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$1140.98%
            
Expenses Paid, Amount $ 114            
Expense Ratio, Percent 0.98%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Non-U.S. Intrinsic Value Fund I Class returned 31.94% for the reporting period ended November 30, 2025.
The fund seeks capital appreciation. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Index.
•
The fund’s stock selection in the financials sector was a significant contributor to performance during the period. While the fund is broadly underweight in the banking industry, select overweight positions that outperformed buoyed results. Fortuitous investment choices in the insurance industry also propelled performance.
•
Security selection in the health care sector aided performance. Holdings in the pharmaceuticals industry helped, both from avoiding exposure to certain benchmark names while taking overweight positions in others that outperformed. A lack of exposure to the health care equipment and supplies industry also contributed.
•
Security selection in the materials sector weighed on performance. A pair of holdings, one in the paper and forest products industry and the other in the chemicals industry, were the fund’s primary detractors in the materials sector.
•
Investment choices in the industrials sector hampered performance. A holding in the professional services industry weighed on results, as did a lack of exposure to the aerospace and defense industry.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
December 3, 2019 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
I Class31.94%11.58%7.60%12/3/19
MSCI ACWI ex USA26.04%8.41%8.72%—
            
Performance Inception Date     Dec. 03, 2019        
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705
Holdings Count | holding 58 58 58 58 58 58 58
Advisory Fees Paid, Amount $ 1,291,331            
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 Stocks98.3%United Kingdom30%
Short-Term Investments0.7%France19%
Other Assets and Liabilities1.0%Germany10%
 South Korea10%
 Netherlands6%
            
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 annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1651.43%
            
Expenses Paid, Amount $ 165            
Expense Ratio, Percent 1.43%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Non-U.S. Intrinsic Value Fund A Class returned 31.41% for the reporting period ended November 30, 2025.
The fund seeks capital appreciation. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Index.
•
The fund’s stock selection in the financials sector was a significant contributor to performance during the period. While the fund is broadly underweight in the banking industry, select overweight positions that outperformed buoyed results. Fortuitous investment choices in the insurance industry also propelled performance.
•
Security selection in the health care sector aided performance. Holdings in the pharmaceuticals industry helped, both from avoiding exposure to certain benchmark names while taking overweight positions in others that outperformed. A lack of exposure to the health care equipment and supplies industry also contributed.
•
Security selection in the materials sector weighed on performance. A pair of holdings, one in the paper and forest products industry and the other in the chemicals industry, were the fund’s primary detractors in the materials sector.
•
Investment choices in the industrials sector hampered performance. A holding in the professional services industry weighed on results, as did a lack of exposure to the aerospace and defense industry.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
December 3, 2019 through November 30, 2025
The initial investment is adjusted to reflect the maximum initial sales charge.
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
A Class31.41%11.07%7.12%12/3/19
A Class - with sales charge23.85%9.76%6.07%12/3/19
MSCI ACWI ex USA26.04%8.41%8.72%—
            
Performance Inception Date     Dec. 03, 2019        
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705
Holdings Count | holding 58 58 58 58 58 58 58
Advisory Fees Paid, Amount $ 1,291,331            
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 Stocks98.3%United Kingdom30%
Short-Term Investments0.7%France19%
Other Assets and Liabilities1.0%Germany10%
 South Korea10%
 Netherlands6%
            
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 annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1941.68%
            
Expenses Paid, Amount $ 194            
Expense Ratio, Percent 1.68%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Non-U.S. Intrinsic Value Fund R Class returned 30.89% for the reporting period ended November 30, 2025.
The fund seeks capital appreciation. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Index.
•
The fund’s stock selection in the financials sector was a significant contributor to performance during the period. While the fund is broadly underweight in the banking industry, select overweight positions that outperformed buoyed results. Fortuitous investment choices in the insurance industry also propelled performance.
•
Security selection in the health care sector aided performance. Holdings in the pharmaceuticals industry helped, both from avoiding exposure to certain benchmark names while taking overweight positions in others that outperformed. A lack of exposure to the health care equipment and supplies industry also contributed.
•
Security selection in the materials sector weighed on performance. A pair of holdings, one in the paper and forest products industry and the other in the chemicals industry, were the fund’s primary detractors in the materials sector.
•
Investment choices in the industrials sector hampered performance. A holding in the professional services industry weighed on results, as did a lack of exposure to the aerospace and defense industry.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
December 3, 2019 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R Class30.89%10.79%6.83%12/3/19
MSCI ACWI ex USA26.04%8.41%8.72%—
            
Performance Inception Date     Dec. 03, 2019        
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705
Holdings Count | holding 58 58 58 58 58 58 58
Advisory Fees Paid, Amount $ 1,291,331            
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 Stocks98.3%United Kingdom30%
Short-Term Investments0.7%France19%
Other Assets and Liabilities1.0%Germany10%
 South Korea10%
 Netherlands6%
            
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 annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R6 Class$960.83%
            
Expenses Paid, Amount $ 96            
Expense Ratio, Percent 0.83%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Non-U.S. Intrinsic Value Fund R6 Class returned 32.11% for the reporting period ended November 30, 2025.
The fund seeks capital appreciation. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Index.
•
The fund’s stock selection in the financials sector was a significant contributor to performance during the period. While the fund is broadly underweight in the banking industry, select overweight positions that outperformed buoyed results. Fortuitous investment choices in the insurance industry also propelled performance.
•
Security selection in the health care sector aided performance. Holdings in the pharmaceuticals industry helped, both from avoiding exposure to certain benchmark names while taking overweight positions in others that outperformed. A lack of exposure to the health care equipment and supplies industry also contributed.
•
Security selection in the materials sector weighed on performance. A pair of holdings, one in the paper and forest products industry and the other in the chemicals industry, were the fund’s primary detractors in the materials sector.
•
Investment choices in the industrials sector hampered performance. A holding in the professional services industry weighed on results, as did a lack of exposure to the aerospace and defense industry.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
December 3, 2019 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R6 Class32.11%11.75%7.77%12/3/19
MSCI ACWI ex USA26.04%8.41%8.72%—
            
Performance Inception Date     Dec. 03, 2019        
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705
Holdings Count | holding 58 58 58 58 58 58 58
Advisory Fees Paid, Amount $ 1,291,331            
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 Stocks98.3%United Kingdom30%
Short-Term Investments0.7%France19%
Other Assets and Liabilities1.0%Germany10%
 South Korea10%
 Netherlands6%
            
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 annual shareholder report contains important information about Non-U.S. Intrinsic Value Fund for the period of December 1, 2024 to November 30, 2025.            
Shareholder Report Annual or Semi-Annual annual shareholder report            
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.            
Additional Information Phone Number 1-800-345-2021            
Additional Information Website americancentury.com/docs            
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
G Class$30.03%
            
Expenses Paid, Amount $ 3            
Expense Ratio, Percent 0.03%            
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Non-U.S. Intrinsic Value Fund G Class returned 33.08% for the reporting period ended November 30, 2025.
The fund seeks capital appreciation. The commentary below refers to the fund's performance relative to the MSCI ACWI ex USA Index.
•
The fund’s stock selection in the financials sector was a significant contributor to performance during the period. While the fund is broadly underweight in the banking industry, select overweight positions that outperformed buoyed results. Fortuitous investment choices in the insurance industry also propelled performance.
•
Security selection in the health care sector aided performance. Holdings in the pharmaceuticals industry helped, both from avoiding exposure to certain benchmark names while taking overweight positions in others that outperformed. A lack of exposure to the health care equipment and supplies industry also contributed.
•
Security selection in the materials sector weighed on performance. A pair of holdings, one in the paper and forest products industry and the other in the chemicals industry, were the fund’s primary detractors in the materials sector.
•
Investment choices in the industrials sector hampered performance. A holding in the professional services industry weighed on results, as did a lack of exposure to the aerospace and defense industry.
            
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
December 6, 2018 through November 30, 2025
10
            
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
G Class33.08%12.65%8.36%12/6/18
MSCI ACWI ex USA26.04%8.41%9.37%—
            
Performance Inception Date         Dec. 06, 2018    
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.            
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.            
Net Assets $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705 $ 556,957,705
Holdings Count | holding 58 58 58 58 58 58 58
Advisory Fees Paid, Amount $ 1,291,331            
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 Stocks98.3%United Kingdom30%
Short-Term Investments0.7%France19%
Other Assets and Liabilities1.0%Germany10%
 South Korea10%
 Netherlands6%