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World Mutual Funds Prospectus | Emerging Markets Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
World Mutual Funds Prospectus | Emerging Markets Small Cap Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
World Mutual Funds Prospectus | Focused Global Growth Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
World Mutual Funds Prospectus | Focused International Growth Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
World Mutual Funds Prospectus | Global Small Cap Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
World Mutual Funds Prospectus | International Value Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
World Mutual Funds Prospectus | Non-U.S. Intrinsic Value Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Capital Portfolios Prospectus | GLOBAL REAL ESTATE FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Capital Portfolios Prospectus | REAL ESTATE FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Mutual Funds, Inc | HERITAGE FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Mutual Funds, Inc | SMALL CAP GROWTH FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Mutual Funds, Inc | SUSTAINABLE EQUITY FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century International Bond Fund | EMERGING MARKETS DEBT FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century International Bond Fund | GLOBAL BOND FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century California Tax-Free and Municipal Funds | California High-Yield Municipal Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century California Tax-Free and Municipal Funds | California Intermediate-Term Tax-Free Bond Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2025 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2030 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2035 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2040 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2045 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2050 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2055 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2060 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE 2065 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE IN RETIREMENT PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2015 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2020 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2025 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2030 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2035 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2040 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2045 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2050 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2055 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2060 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Asset Allocation Portfolio | ONE CHOICE BLEND+ 2065 PORTFOLIO  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS INC | STRATEGIC ALLOCATION: AGGRESSIVE FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS INC | STRATEGIC ALLOCATION: CONSERVATIVE FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS INC | STRATEGIC ALLOCATION: MODERATE FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Growth Funds | FOCUSED DYNAMIC GROWTH FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Quantitative Equity Funds Prospectus | DISCIPLINED CORE VALUE FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Quantitative Equity Funds Prospectus | EQUITY GROWTH FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Quantitative Equity Funds Prospectus | GLOBAL GOLD FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
American Century Quantitative Equity Funds Prospectus | SMALL COMPANY FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
AMERICAN CENTURY MUNICIPAL TRUST | HIGH-YIELD MUNICIPAL FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None
AMERICAN CENTURY MUNICIPAL TRUST | INTERMEDIATE-TERM TAX-FREE BOND FUND  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Prospectus Supplement
Supplement dated August 1, 2024
newaci_logoblk.jpg
Emerging Markets Fund n Emerging Markets Small Cap Fund n Focused Global Growth Fund
Focused International Growth Fund n Global Small Cap Fund n International Value Fund n Non-U.S. Intrinsic Value Fund
(Prospectuses dated April 1, 2024)

Global Real Estate Fund n Real Estate Fund n Heritage Fund n Small Cap Growth Fund Sustainable Equity Fund n Emerging Markets Debt Fund n Global Bond Fund
(Prospectuses dated March 1, 2024)

California High-Yield Municipal Fund n California Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated January 1, 2024)

One Choice© 2025 Portfolio n One Choice© 2030 Portfolio n One Choice© 2035 Portfolio
One Choice© 2040 Portfolio n One Choice© 2045 Portfolio n One Choice© 2050 Portfolio
One Choice© 2055 Portfolio n One Choice© 2060 Portfolio n One Choice© 2065 Portfolio
One Choice© In Retirement Portfolio n One Choice© Blend+ 2015 Portfolio
One Choice© Blend+ 2020 Portfolio n One Choice© Blend+ 2025 Portfolio
One Choice© Blend+ 2030 Portfolio n One Choice© Blend+2035 Portfolio
One Choice© Blend+ 2040 Portfolio n One Choice© Blend+ 2045 Portfolio
One Choice© Blend+ 2050 Portfolio n One Choice© Blend+ 2055 Portfolio
One Choice© Blend+ 2060 Portfolio n One Choice© Blend+ 2065 Portfolio
Strategic Allocation: Aggressive Fund n Strategic Allocation: Conservative Fund
Strategic Allocation: Moderate Fund n Focused Dynamic Growth Fund
(Prospectuses dated December 1, 2023)

Disciplined Core Value Fund n Equity Growth Fund n Global Gold Fund n Small Company Fund
(Prospectuses dated November 1, 2023)

High-Yield Municipal Fund n Intermediate-Term Tax-Free Bond Fund
(Prospectuses dated October 1, 2023)


Beginning October 2024, the total eligible investments required to qualify for a waiver of the annual account maintenance fee will change from $10,000 to $25,000. Such fee will also be waived for any accounts for which the shareholder has elected to receive electronic delivery of all fund/account documents.

As a result, the Shareholder Fees table in each prospectus is updated to reflect the following:

Investor Class
All other classes
Maximum Annual Account Maintenance Fee
(waived if eligible investments total at least $25,000
or shareholder has elected electronic delivery)

$25

None