v3.26.1
Shareholder Report
12 Months Ended 111 Months Ended
Jun. 30, 2026
USD ($)
holding
Jun. 30, 2026
USD ($)
holding
Shareholder Report [Line Items]    
Document Type N-CSR  
Amendment Flag false  
Registrant Name AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS, INC.  
Entity Central Index Key 0000827060  
Entity Investment Company Type N-1A  
Document Period End Date Jun. 30, 2026  
Shareholder Report Annual or Semi-Annual Annual Shareholder Report  
C000016466 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Core Equity Fund  
Class Name Investor Class  
Trading Symbol BEQGX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Core Equity Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$740.66%
 
Expenses Paid, Amount $ 74  
Expense Ratio, Percent 0.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Core Equity Fund Investor Class returned 23.26% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. The commentary below refers to the fund's performance compared to the S&P 500 Index.
The health care sector was a positive contributor to relative performance, driven by strong security selection. Positioning in the health care equipment and supplies and pharmaceuticals industries contributed most to relative results. Pharmaceutical giants Merck & Co. and Johnson & Johnson were the sector's main sources of strength.
The financials sector also benefited from positive security selection. The capital markets and banking industries were the strongest contributors to the sector's positive result. Multinational bank Citigroup was the leading source of the strength.
The information technology sector was a detractor from relative performance, driven by weak security selection. An overweight allocation and stock choices meant software stocks detracted most at the industry level. A lack of exposure to Intel, a designer and manufacturer of semiconductors and computing hardware, was the number one overall detractor regardless of sector.
The consumer staples sector detracted from relative performance, with an overweight allocation being the primary driver. The consumer staples distribution and retail industry hurt relative results the most. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a notable detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class23.26%10.95%13.43%
S&P 50022.32%13.41%15.51%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,911,687,395 $ 1,911,687,395
Holdings Count | holding 182 182
Advisory Fees Paid, Amount $ 11,671,105  
Investment Company, Portfolio Turnover 97.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.4%Semiconductors and Semiconductor Equipment19%
Short-Term Investments0.4%Technology Hardware, Storage and Peripherals10%
Other Assets and Liabilities0.2%Interactive Media and Services8%
Banks7%
Software6%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.  
C000016468 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Core Equity Fund  
Class Name I Class  
Trading Symbol AMEIX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Core Equity Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$510.46%
 
Expenses Paid, Amount $ 51  
Expense Ratio, Percent 0.46%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Core Equity Fund I Class returned 23.52% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. The commentary below refers to the fund's performance compared to the S&P 500 Index.
The health care sector was a positive contributor to relative performance, driven by strong security selection. Positioning in the health care equipment and supplies and pharmaceuticals industries contributed most to relative results. Pharmaceutical giants Merck & Co. and Johnson & Johnson were the sector's main sources of strength.
The financials sector also benefited from positive security selection. The capital markets and banking industries were the strongest contributors to the sector's positive result. Multinational bank Citigroup was the leading source of the strength.
The information technology sector was a detractor from relative performance, driven by weak security selection. An overweight allocation and stock choices meant software stocks detracted most at the industry level. A lack of exposure to Intel, a designer and manufacturer of semiconductors and computing hardware, was the number one overall detractor regardless of sector.
The consumer staples sector detracted from relative performance, with an overweight allocation being the primary driver. The consumer staples distribution and retail industry hurt relative results the most. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a notable detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class23.52%11.17%13.65%
S&P 50022.32%13.41%15.51%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,911,687,395 $ 1,911,687,395
Holdings Count | holding 182 182
Advisory Fees Paid, Amount $ 11,671,105  
Investment Company, Portfolio Turnover 97.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.4%Semiconductors and Semiconductor Equipment19%
Short-Term Investments0.4%Technology Hardware, Storage and Peripherals10%
Other Assets and Liabilities0.2%Interactive Media and Services8%
Banks7%
Software6%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.  
C000016467 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Core Equity Fund  
Class Name A Class  
Trading Symbol BEQAX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Core Equity Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1010.91%
 
Expenses Paid, Amount $ 101  
Expense Ratio, Percent 0.91%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Core Equity Fund A Class returned 22.93% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. The commentary below refers to the fund's performance compared to the S&P 500 Index.
The health care sector was a positive contributor to relative performance, driven by strong security selection. Positioning in the health care equipment and supplies and pharmaceuticals industries contributed most to relative results. Pharmaceutical giants Merck & Co. and Johnson & Johnson were the sector's main sources of strength.
The financials sector also benefited from positive security selection. The capital markets and banking industries were the strongest contributors to the sector's positive result. Multinational bank Citigroup was the leading source of the strength.
The information technology sector was a detractor from relative performance, driven by weak security selection. An overweight allocation and stock choices meant software stocks detracted most at the industry level. A lack of exposure to Intel, a designer and manufacturer of semiconductors and computing hardware, was the number one overall detractor regardless of sector.
The consumer staples sector detracted from relative performance, with an overweight allocation being the primary driver. The consumer staples distribution and retail industry hurt relative results the most. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a notable detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
The initial investment is adjusted to reflect the maximum initial sales charge.
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class22.93%10.67%13.14%
A Class - with sales charge15.86%9.36%12.47%
S&P 50022.32%13.41%15.51%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,911,687,395 $ 1,911,687,395
Holdings Count | holding 182 182
Advisory Fees Paid, Amount $ 11,671,105  
Investment Company, Portfolio Turnover 97.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.4%Semiconductors and Semiconductor Equipment19%
Short-Term Investments0.4%Technology Hardware, Storage and Peripherals10%
Other Assets and Liabilities0.2%Interactive Media and Services8%
Banks7%
Software6%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.  
C000016469 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Core Equity Fund  
Class Name C Class  
Trading Symbol AEYCX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Core Equity Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1841.66%
 
Expenses Paid, Amount $ 184  
Expense Ratio, Percent 1.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Core Equity Fund C Class returned 22.04% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. The commentary below refers to the fund's performance compared to the S&P 500 Index.
The health care sector was a positive contributor to relative performance, driven by strong security selection. Positioning in the health care equipment and supplies and pharmaceuticals industries contributed most to relative results. Pharmaceutical giants Merck & Co. and Johnson & Johnson were the sector's main sources of strength.
The financials sector also benefited from positive security selection. The capital markets and banking industries were the strongest contributors to the sector's positive result. Multinational bank Citigroup was the leading source of the strength.
The information technology sector was a detractor from relative performance, driven by weak security selection. An overweight allocation and stock choices meant software stocks detracted most at the industry level. A lack of exposure to Intel, a designer and manufacturer of semiconductors and computing hardware, was the number one overall detractor regardless of sector.
The consumer staples sector detracted from relative performance, with an overweight allocation being the primary driver. The consumer staples distribution and retail industry hurt relative results the most. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a notable detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class22.04%9.84%12.30%
S&P 50022.32%13.41%15.51%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,911,687,395 $ 1,911,687,395
Holdings Count | holding 182 182
Advisory Fees Paid, Amount $ 11,671,105  
Investment Company, Portfolio Turnover 97.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.4%Semiconductors and Semiconductor Equipment19%
Short-Term Investments0.4%Technology Hardware, Storage and Peripherals10%
Other Assets and Liabilities0.2%Interactive Media and Services8%
Banks7%
Software6%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.  
C000016470 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Core Equity Fund  
Class Name R Class  
Trading Symbol AEYRX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Core Equity Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1291.16%
 
Expenses Paid, Amount $ 129  
Expense Ratio, Percent 1.16%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Core Equity Fund R Class returned 22.63% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. The commentary below refers to the fund's performance compared to the S&P 500 Index.
The health care sector was a positive contributor to relative performance, driven by strong security selection. Positioning in the health care equipment and supplies and pharmaceuticals industries contributed most to relative results. Pharmaceutical giants Merck & Co. and Johnson & Johnson were the sector's main sources of strength.
The financials sector also benefited from positive security selection. The capital markets and banking industries were the strongest contributors to the sector's positive result. Multinational bank Citigroup was the leading source of the strength.
The information technology sector was a detractor from relative performance, driven by weak security selection. An overweight allocation and stock choices meant software stocks detracted most at the industry level. A lack of exposure to Intel, a designer and manufacturer of semiconductors and computing hardware, was the number one overall detractor regardless of sector.
The consumer staples sector detracted from relative performance, with an overweight allocation being the primary driver. The consumer staples distribution and retail industry hurt relative results the most. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a notable detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class22.63%10.39%12.86%
S&P 50022.32%13.41%15.51%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,911,687,395 $ 1,911,687,395
Holdings Count | holding 182 182
Advisory Fees Paid, Amount $ 11,671,105  
Investment Company, Portfolio Turnover 97.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.4%Semiconductors and Semiconductor Equipment19%
Short-Term Investments0.4%Technology Hardware, Storage and Peripherals10%
Other Assets and Liabilities0.2%Interactive Media and Services8%
Banks7%
Software6%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.  
C000189760 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Core Equity Fund  
Class Name R5 Class  
Trading Symbol AEYGX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Core Equity Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$510.46%
 
Expenses Paid, Amount $ 51  
Expense Ratio, Percent 0.46%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Core Equity Fund R5 Class returned 23.51% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. The commentary below refers to the fund's performance compared to the S&P 500 Index.
The health care sector was a positive contributor to relative performance, driven by strong security selection. Positioning in the health care equipment and supplies and pharmaceuticals industries contributed most to relative results. Pharmaceutical giants Merck & Co. and Johnson & Johnson were the sector's main sources of strength.
The financials sector also benefited from positive security selection. The capital markets and banking industries were the strongest contributors to the sector's positive result. Multinational bank Citigroup was the leading source of the strength.
The information technology sector was a detractor from relative performance, driven by weak security selection. An overweight allocation and stock choices meant software stocks detracted most at the industry level. A lack of exposure to Intel, a designer and manufacturer of semiconductors and computing hardware, was the number one overall detractor regardless of sector.
The consumer staples sector detracted from relative performance, with an overweight allocation being the primary driver. The consumer staples distribution and retail industry hurt relative results the most. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a notable detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R5 Class23.51%11.16%13.12%4/10/17
S&P 50022.32%13.41%15.24%
 
Performance Inception Date   Apr. 10, 2017
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,911,687,395 $ 1,911,687,395
Holdings Count | holding 182 182
Advisory Fees Paid, Amount $ 11,671,105  
Investment Company, Portfolio Turnover 97.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.4%Semiconductors and Semiconductor Equipment19%
Short-Term Investments0.4%Technology Hardware, Storage and Peripherals10%
Other Assets and Liabilities0.2%Interactive Media and Services8%
Banks7%
Software6%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Equity Growth Fund was renamed as Disciplined Core Equity Fund.  
C000016462 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Growth Fund  
Class Name Investor Class  
Trading Symbol ADSIX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Growth Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$990.92%
 
Expenses Paid, Amount $ 99  
Expense Ratio, Percent 0.92%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Growth Fund Investor Class returned 15.38% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance compared to the Russell 1000 Growth Index.
Within the industrials sector, stock picks were negative, weighing on the sector's overall contribution. Positioning in the aerospace and defense industry detracted most. An underweight to GE Vernova, a provider of power generation and energy technology equipment and services, was a top relative detractor.
Within the communication services sector, stock choices drove the sector's detraction. The interactive media and services industry was the primary source of weakness within the sector. Global music, podcast and audio streaming service Spotify Technology was a leading relative detractor.
Within health care, selection and allocation decisions were positive, supporting the sector's favorable contribution. The health care equipment and supplies industry was the strongest contributor. A lack of exposure to Intuitive Surgical, a company that develops robotic-assisted surgical systems, was among the leading contributors to relative performance.
Within financials, security selection was positive, underpinning the sector's overall contribution. An underweight allocation and stock choices made the capital markets industry the top contributor within the sector. It benefited from relative results to avoid several poor performers in the industry.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class15.38%11.91%15.72%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Growth17.71%13.71%18.58%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 451,584,640 $ 451,584,640
Holdings Count | holding 139 139
Advisory Fees Paid, Amount $ 4,071,830  
Investment Company, Portfolio Turnover 76.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Semiconductors and Semiconductor Equipment26%
Short-Term Investments0.2%Technology Hardware, Storage and Peripherals12%
Other Assets and Liabilities0.3%Software12%
Interactive Media and Services10%
Electrical Equipment5%
 
Material Fund Change [Text Block]
Fund Changes
Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.
 
Material Fund Change Expenses [Text Block] Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.  
C000016464 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Growth Fund  
Class Name I Class  
Trading Symbol ADCIX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Growth Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$780.72%
 
Expenses Paid, Amount $ 78  
Expense Ratio, Percent 0.72%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Growth Fund I Class returned 15.60% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance compared to the Russell 1000 Growth Index.
Within the industrials sector, stock picks were negative, weighing on the sector's overall contribution. Positioning in the aerospace and defense industry detracted most. An underweight to GE Vernova, a provider of power generation and energy technology equipment and services, was a top relative detractor.
Within the communication services sector, stock choices drove the sector's detraction. The interactive media and services industry was the primary source of weakness within the sector. Global music, podcast and audio streaming service Spotify Technology was a leading relative detractor.
Within health care, selection and allocation decisions were positive, supporting the sector's favorable contribution. The health care equipment and supplies industry was the strongest contributor. A lack of exposure to Intuitive Surgical, a company that develops robotic-assisted surgical systems, was among the leading contributors to relative performance.
Within financials, security selection was positive, underpinning the sector's overall contribution. An underweight allocation and stock choices made the capital markets industry the top contributor within the sector. It benefited from relative results to avoid several poor performers in the industry.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026

10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class15.60%12.13%15.96%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Growth17.71%13.71%18.58%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 451,584,640 $ 451,584,640
Holdings Count | holding 139 139
Advisory Fees Paid, Amount $ 4,071,830  
Investment Company, Portfolio Turnover 76.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Semiconductors and Semiconductor Equipment26%
Short-Term Investments0.2%Technology Hardware, Storage and Peripherals12%
Other Assets and Liabilities0.3%Software12%
Interactive Media and Services10%
Electrical Equipment5%
 
Material Fund Change [Text Block]
Fund Changes
Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.
 
Material Fund Change Expenses [Text Block] Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.  
C000189758 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Growth Fund  
Class Name Y Class  
Trading Symbol ADCYX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Growth Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Y Class$720.67%
 
Expenses Paid, Amount $ 72  
Expense Ratio, Percent 0.67%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Growth Fund Y Class returned 15.65% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance compared to the Russell 1000 Growth Index.
Within the industrials sector, stock picks were negative, weighing on the sector's overall contribution. Positioning in the aerospace and defense industry detracted most. An underweight to GE Vernova, a provider of power generation and energy technology equipment and services, was a top relative detractor.
Within the communication services sector, stock choices drove the sector's detraction. The interactive media and services industry was the primary source of weakness within the sector. Global music, podcast and audio streaming service Spotify Technology was a leading relative detractor.
Within health care, selection and allocation decisions were positive, supporting the sector's favorable contribution. The health care equipment and supplies industry was the strongest contributor. A lack of exposure to Intuitive Surgical, a company that develops robotic-assisted surgical systems, was among the leading contributors to relative performance.
Within financials, security selection was positive, underpinning the sector's overall contribution. An underweight allocation and stock choices made the capital markets industry the top contributor within the sector. It benefited from relative results to avoid several poor performers in the industry.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
Y Class15.65%12.19%15.42%4/10/17
Regulatory Index
Russell 100022.01%12.66%15.00%
Performance Index
Russell 1000 Growth17.71%13.71%18.50%
 
Performance Inception Date   Apr. 10, 2017
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 451,584,640 $ 451,584,640
Holdings Count | holding 139 139
Advisory Fees Paid, Amount $ 4,071,830  
Investment Company, Portfolio Turnover 76.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Semiconductors and Semiconductor Equipment26%
Short-Term Investments0.2%Technology Hardware, Storage and Peripherals12%
Other Assets and Liabilities0.3%Software12%
Interactive Media and Services10%
Electrical Equipment5%
 
Material Fund Change [Text Block]
Fund Changes
Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.
 
Material Fund Change Expenses [Text Block] Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.  
C000016463 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Growth Fund  
Class Name A Class  
Trading Symbol ADCVX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Growth Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1261.17%
 
Expenses Paid, Amount $ 126  
Expense Ratio, Percent 1.17%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Growth Fund A Class returned 15.09% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance compared to the Russell 1000 Growth Index.
Within the industrials sector, stock picks were negative, weighing on the sector's overall contribution. Positioning in the aerospace and defense industry detracted most. An underweight to GE Vernova, a provider of power generation and energy technology equipment and services, was a top relative detractor.
Within the communication services sector, stock choices drove the sector's detraction. The interactive media and services industry was the primary source of weakness within the sector. Global music, podcast and audio streaming service Spotify Technology was a leading relative detractor.
Within health care, selection and allocation decisions were positive, supporting the sector's favorable contribution. The health care equipment and supplies industry was the strongest contributor. A lack of exposure to Intuitive Surgical, a company that develops robotic-assisted surgical systems, was among the leading contributors to relative performance.
Within financials, security selection was positive, underpinning the sector's overall contribution. An underweight allocation and stock choices made the capital markets industry the top contributor within the sector. It benefited from relative results to avoid several poor performers in the industry.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
The initial investment is adjusted to reflect the maximum initial sales charge.
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class15.09%11.63%15.44%
A Class - with sales charge8.48%10.32%14.75%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Growth17.71%13.71%18.58%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 451,584,640 $ 451,584,640
Holdings Count | holding 139 139
Advisory Fees Paid, Amount $ 4,071,830  
Investment Company, Portfolio Turnover 76.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Semiconductors and Semiconductor Equipment26%
Short-Term Investments0.2%Technology Hardware, Storage and Peripherals12%
Other Assets and Liabilities0.3%Software12%
Interactive Media and Services10%
Electrical Equipment5%
 
Material Fund Change [Text Block]
Fund Changes
Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.
 
Material Fund Change Expenses [Text Block] Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.  
C000055501 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Growth Fund  
Class Name C Class  
Trading Symbol ADCCX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Growth Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2061.92%
 
Expenses Paid, Amount $ 206  
Expense Ratio, Percent 1.92%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Growth Fund C Class returned 14.20% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance compared to the Russell 1000 Growth Index.
Within the industrials sector, stock picks were negative, weighing on the sector's overall contribution. Positioning in the aerospace and defense industry detracted most. An underweight to GE Vernova, a provider of power generation and energy technology equipment and services, was a top relative detractor.
Within the communication services sector, stock choices drove the sector's detraction. The interactive media and services industry was the primary source of weakness within the sector. Global music, podcast and audio streaming service Spotify Technology was a leading relative detractor.
Within health care, selection and allocation decisions were positive, supporting the sector's favorable contribution. The health care equipment and supplies industry was the strongest contributor. A lack of exposure to Intuitive Surgical, a company that develops robotic-assisted surgical systems, was among the leading contributors to relative performance.
Within financials, security selection was positive, underpinning the sector's overall contribution. An underweight allocation and stock choices made the capital markets industry the top contributor within the sector. It benefited from relative results to avoid several poor performers in the industry.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class14.20%10.80%14.58%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Growth17.71%13.71%18.58%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 451,584,640 $ 451,584,640
Holdings Count | holding 139 139
Advisory Fees Paid, Amount $ 4,071,830  
Investment Company, Portfolio Turnover 76.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Semiconductors and Semiconductor Equipment26%
Short-Term Investments0.2%Technology Hardware, Storage and Peripherals12%
Other Assets and Liabilities0.3%Software12%
Interactive Media and Services10%
Electrical Equipment5%
 
Material Fund Change [Text Block]
Fund Changes
Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.
 
Material Fund Change Expenses [Text Block] Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.  
C000016465 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Growth Fund  
Class Name R Class  
Trading Symbol ADRRX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Growth Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1531.42%
 
Expenses Paid, Amount $ 153  
Expense Ratio, Percent 1.42%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Growth Fund R Class returned 14.83% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance compared to the Russell 1000 Growth Index.
Within the industrials sector, stock picks were negative, weighing on the sector's overall contribution. Positioning in the aerospace and defense industry detracted most. An underweight to GE Vernova, a provider of power generation and energy technology equipment and services, was a top relative detractor.
Within the communication services sector, stock choices drove the sector's detraction. The interactive media and services industry was the primary source of weakness within the sector. Global music, podcast and audio streaming service Spotify Technology was a leading relative detractor.
Within health care, selection and allocation decisions were positive, supporting the sector's favorable contribution. The health care equipment and supplies industry was the strongest contributor. A lack of exposure to Intuitive Surgical, a company that develops robotic-assisted surgical systems, was among the leading contributors to relative performance.
Within financials, security selection was positive, underpinning the sector's overall contribution. An underweight allocation and stock choices made the capital markets industry the top contributor within the sector. It benefited from relative results to avoid several poor performers in the industry.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class14.83%11.35%15.15%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Growth17.71%13.71%18.58%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 451,584,640 $ 451,584,640
Holdings Count | holding 139 139
Advisory Fees Paid, Amount $ 4,071,830  
Investment Company, Portfolio Turnover 76.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Semiconductors and Semiconductor Equipment26%
Short-Term Investments0.2%Technology Hardware, Storage and Peripherals12%
Other Assets and Liabilities0.3%Software12%
Interactive Media and Services10%
Electrical Equipment5%
 
Material Fund Change [Text Block]
Fund Changes
Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.
 
Material Fund Change Expenses [Text Block] Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.  
C000189759 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Growth Fund  
Class Name R5 Class  
Trading Symbol ADGGX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Growth Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$780.72%
 
Expenses Paid, Amount $ 78  
Expense Ratio, Percent 0.72%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Growth Fund R5 Class returned 15.62% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth. The commentary below refers to the fund's performance compared to the Russell 1000 Growth Index.
Within the industrials sector, stock picks were negative, weighing on the sector's overall contribution. Positioning in the aerospace and defense industry detracted most. An underweight to GE Vernova, a provider of power generation and energy technology equipment and services, was a top relative detractor.
Within the communication services sector, stock choices drove the sector's detraction. The interactive media and services industry was the primary source of weakness within the sector. Global music, podcast and audio streaming service Spotify Technology was a leading relative detractor.
Within health care, selection and allocation decisions were positive, supporting the sector's favorable contribution. The health care equipment and supplies industry was the strongest contributor. A lack of exposure to Intuitive Surgical, a company that develops robotic-assisted surgical systems, was among the leading contributors to relative performance.
Within financials, security selection was positive, underpinning the sector's overall contribution. An underweight allocation and stock choices made the capital markets industry the top contributor within the sector. It benefited from relative results to avoid several poor performers in the industry.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R5 Class15.62%12.14%15.36%4/10/17
Regulatory Index
Russell 100022.01%12.66%15.00%
Performance Index
Russell 1000 Growth17.71%13.71%18.50%
 
Performance Inception Date   Apr. 10, 2017
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 451,584,640 $ 451,584,640
Holdings Count | holding 139 139
Advisory Fees Paid, Amount $ 4,071,830  
Investment Company, Portfolio Turnover 76.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Semiconductors and Semiconductor Equipment26%
Short-Term Investments0.2%Technology Hardware, Storage and Peripherals12%
Other Assets and Liabilities0.3%Software12%
Interactive Media and Services10%
Electrical Equipment5%
 
Material Fund Change [Text Block]
Fund Changes
Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.
 
Material Fund Change Expenses [Text Block] Effective August 1, 2026, the fund's 0.09% management fee waiver was discontinued and replaced with a permanent 0.09% reduction in the fund's management fee.  
C000016473 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Value Fund  
Class Name Investor Class  
Trading Symbol BIGRX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Value Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$750.66%
 
Expenses Paid, Amount $ 75  
Expense Ratio, Percent 0.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Value Fund Investor Class returned 27.05% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. Income is a secondary objective. The commentary below refers to the fund's performance compared to the Russell 1000 Value Index.
The health care sector was a positive contributor to relative performance, driven primarily by strong stock selection. The pharmaceuticals industry was the leading contributor. Merck & Co., a global pharmaceutical company engaged in the research, development and commercialization of medicines and vaccines, was among the top contributors within the sector.
The industrials sector also contributed positively to relative results as a result of stock choices. The machinery industry was the largest contributor. Cummins, a manufacturer of diesel and natural gas engines, filtration systems and power generation products, was a strong contributor within the sector.
Stock selection made the information technology sector the most significant detractor from relative performance. The IT services industry was the main source of weakness. An underweight to Intel, a semiconductor company that designs and manufactures processors and related technologies, was a top detractor. Adobe, a software company providing digital media and marketing solutions, also ranked among the top relative detractors.
An overweight and stock choices meant the consumer staples sector detracted from performance relative to the index. The consumer staples distribution and retail industry was the key detractor within the sector. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a top detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
2199023255562
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class27.05%8.27%11.31%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Value27.09%11.17%11.52%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 2,054,523,712 $ 2,054,523,712
Holdings Count | holding 187 187
Advisory Fees Paid, Amount $ 12,279,922  
Investment Company, Portfolio Turnover 121.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Banks9%
Short-Term Investments0.4%Semiconductors and Semiconductor Equipment7%
Other Assets and Liabilities0.1%Pharmaceuticals6%
Technology Hardware, Storage and Peripherals5%
Consumer Staples Distribution & Retail5%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.  
C000016475 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Value Fund  
Class Name I Class  
Trading Symbol AMGIX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Value Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$520.46%
 
Expenses Paid, Amount $ 52  
Expense Ratio, Percent 0.46%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Value Fund I Class returned 27.32% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. Income is a secondary objective. The commentary below refers to the fund's performance compared to the Russell 1000 Value Index.
The health care sector was a positive contributor to relative performance, driven primarily by strong stock selection. The pharmaceuticals industry was the leading contributor. Merck & Co., a global pharmaceutical company engaged in the research, development and commercialization of medicines and vaccines, was among the top contributors within the sector.
The industrials sector also contributed positively to relative results as a result of stock choices. The machinery industry was the largest contributor. Cummins, a manufacturer of diesel and natural gas engines, filtration systems and power generation products, was a strong contributor within the sector.
Stock selection made the information technology sector the most significant detractor from relative performance. The IT services industry was the main source of weakness. An underweight to Intel, a semiconductor company that designs and manufactures processors and related technologies, was a top detractor. Adobe, a software company providing digital media and marketing solutions, also ranked among the top relative detractors.
An overweight and stock choices meant the consumer staples sector detracted from performance relative to the index. The consumer staples distribution and retail industry was the key detractor within the sector. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a top detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class27.32%8.48%11.53%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Value27.09%11.17%11.52%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 2,054,523,712 $ 2,054,523,712
Holdings Count | holding 187 187
Advisory Fees Paid, Amount $ 12,279,922  
Investment Company, Portfolio Turnover 121.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Banks9%
Short-Term Investments0.4%Semiconductors and Semiconductor Equipment7%
Other Assets and Liabilities0.1%Pharmaceuticals6%
Technology Hardware, Storage and Peripherals5%
Consumer Staples Distribution & Retail5%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.  
C000016474 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Value Fund  
Class Name A Class  
Trading Symbol AMADX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Value Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1030.91%
 
Expenses Paid, Amount $ 103  
Expense Ratio, Percent 0.91%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Value Fund A Class returned 26.74% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. Income is a secondary objective. The commentary below refers to the fund's performance compared to the Russell 1000 Value Index.
The health care sector was a positive contributor to relative performance, driven primarily by strong stock selection. The pharmaceuticals industry was the leading contributor. Merck & Co., a global pharmaceutical company engaged in the research, development and commercialization of medicines and vaccines, was among the top contributors within the sector.
The industrials sector also contributed positively to relative results as a result of stock choices. The machinery industry was the largest contributor. Cummins, a manufacturer of diesel and natural gas engines, filtration systems and power generation products, was a strong contributor within the sector.
Stock selection made the information technology sector the most significant detractor from relative performance. The IT services industry was the main source of weakness. An underweight to Intel, a semiconductor company that designs and manufactures processors and related technologies, was a top detractor. Adobe, a software company providing digital media and marketing solutions, also ranked among the top relative detractors.
An overweight and stock choices meant the consumer staples sector detracted from performance relative to the index. The consumer staples distribution and retail industry was the key detractor within the sector. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a top detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
The initial investment is adjusted to reflect the maximum initial sales charge.
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class26.74%8.00%11.03%
A Class - with sales charge19.45%6.73%10.38%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Value27.09%11.17%11.52%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 2,054,523,712 $ 2,054,523,712
Holdings Count | holding 187 187
Advisory Fees Paid, Amount $ 12,279,922  
Investment Company, Portfolio Turnover 121.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Banks9%
Short-Term Investments0.4%Semiconductors and Semiconductor Equipment7%
Other Assets and Liabilities0.1%Pharmaceuticals6%
Technology Hardware, Storage and Peripherals5%
Consumer Staples Distribution & Retail5%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.  
C000016476 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Value Fund  
Class Name C Class  
Trading Symbol ACGCX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Value Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$1871.66%
 
Expenses Paid, Amount $ 187  
Expense Ratio, Percent 1.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Value Fund C Class returned 25.78% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. Income is a secondary objective. The commentary below refers to the fund's performance compared to the Russell 1000 Value Index.
The health care sector was a positive contributor to relative performance, driven primarily by strong stock selection. The pharmaceuticals industry was the leading contributor. Merck & Co., a global pharmaceutical company engaged in the research, development and commercialization of medicines and vaccines, was among the top contributors within the sector.
The industrials sector also contributed positively to relative results as a result of stock choices. The machinery industry was the largest contributor. Cummins, a manufacturer of diesel and natural gas engines, filtration systems and power generation products, was a strong contributor within the sector.
Stock selection made the information technology sector the most significant detractor from relative performance. The IT services industry was the main source of weakness. An underweight to Intel, a semiconductor company that designs and manufactures processors and related technologies, was a top detractor. Adobe, a software company providing digital media and marketing solutions, also ranked among the top relative detractors.
An overweight and stock choices meant the consumer staples sector detracted from performance relative to the index. The consumer staples distribution and retail industry was the key detractor within the sector. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a top detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class25.78%7.19%10.20%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Value27.09%11.17%11.52%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 2,054,523,712 $ 2,054,523,712
Holdings Count | holding 187 187
Advisory Fees Paid, Amount $ 12,279,922  
Investment Company, Portfolio Turnover 121.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Banks9%
Short-Term Investments0.4%Semiconductors and Semiconductor Equipment7%
Other Assets and Liabilities0.1%Pharmaceuticals6%
Technology Hardware, Storage and Peripherals5%
Consumer Staples Distribution & Retail5%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.  
C000016477 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Value Fund  
Class Name R Class  
Trading Symbol AICRX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Value Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1311.16%
 
Expenses Paid, Amount $ 131  
Expense Ratio, Percent 1.16%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Value Fund R Class returned 26.43% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. Income is a secondary objective. The commentary below refers to the fund's performance compared to the Russell 1000 Value Index.
The health care sector was a positive contributor to relative performance, driven primarily by strong stock selection. The pharmaceuticals industry was the leading contributor. Merck & Co., a global pharmaceutical company engaged in the research, development and commercialization of medicines and vaccines, was among the top contributors within the sector.
The industrials sector also contributed positively to relative results as a result of stock choices. The machinery industry was the largest contributor. Cummins, a manufacturer of diesel and natural gas engines, filtration systems and power generation products, was a strong contributor within the sector.
Stock selection made the information technology sector the most significant detractor from relative performance. The IT services industry was the main source of weakness. An underweight to Intel, a semiconductor company that designs and manufactures processors and related technologies, was a top detractor. Adobe, a software company providing digital media and marketing solutions, also ranked among the top relative detractors.
An overweight and stock choices meant the consumer staples sector detracted from performance relative to the index. The consumer staples distribution and retail industry was the key detractor within the sector. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a top detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class26.43%7.72%10.75%
Regulatory Index
Russell 100022.01%12.66%15.29%
Performance Index
Russell 1000 Value27.09%11.17%11.52%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 2,054,523,712 $ 2,054,523,712
Holdings Count | holding 187 187
Advisory Fees Paid, Amount $ 12,279,922  
Investment Company, Portfolio Turnover 121.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Banks9%
Short-Term Investments0.4%Semiconductors and Semiconductor Equipment7%
Other Assets and Liabilities0.1%Pharmaceuticals6%
Technology Hardware, Storage and Peripherals5%
Consumer Staples Distribution & Retail5%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.  
C000189761 [Member]    
Shareholder Report [Line Items]    
Fund Name Disciplined Value Fund  
Class Name R5 Class  
Trading Symbol AICGX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Disciplined Value Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Material Fund Change Notice [Text Block] This report describes changes to the fund that occurred during the reporting period.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$520.46%
 
Expenses Paid, Amount $ 52  
Expense Ratio, Percent 0.46%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Disciplined Value Fund R5 Class returned 27.30% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing in common stocks. Income is a secondary objective. The commentary below refers to the fund's performance compared to the Russell 1000 Value Index.
The health care sector was a positive contributor to relative performance, driven primarily by strong stock selection. The pharmaceuticals industry was the leading contributor. Merck & Co., a global pharmaceutical company engaged in the research, development and commercialization of medicines and vaccines, was among the top contributors within the sector.
The industrials sector also contributed positively to relative results as a result of stock choices. The machinery industry was the largest contributor. Cummins, a manufacturer of diesel and natural gas engines, filtration systems and power generation products, was a strong contributor within the sector.
Stock selection made the information technology sector the most significant detractor from relative performance. The IT services industry was the main source of weakness. An underweight to Intel, a semiconductor company that designs and manufactures processors and related technologies, was a top detractor. Adobe, a software company providing digital media and marketing solutions, also ranked among the top relative detractors.
An overweight and stock choices meant the consumer staples sector detracted from performance relative to the index. The consumer staples distribution and retail industry was the key detractor within the sector. Kroger, a large retail grocery chain operating supermarkets and multi-department stores across the U.S., was a top detractor.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R5 Class27.30%8.48%10.94%4/10/17
Regulatory Index
Russell 100022.01%12.66%15.00%
Performance Index
Russell 1000 Value27.09%11.17%10.98%
 
Performance Inception Date   Apr. 10, 2017
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 2,054,523,712 $ 2,054,523,712
Holdings Count | holding 187 187
Advisory Fees Paid, Amount $ 12,279,922  
Investment Company, Portfolio Turnover 121.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.5%Banks9%
Short-Term Investments0.4%Semiconductors and Semiconductor Equipment7%
Other Assets and Liabilities0.1%Pharmaceuticals6%
Technology Hardware, Storage and Peripherals5%
Consumer Staples Distribution & Retail5%
 
Material Fund Change [Text Block]
Fund Changes
Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.
 
Material Fund Change Name [Text Block] Effective March 10, 2026, Disciplined Core Value Fund was renamed as Disciplined Value Fund.  
C000016471 [Member]    
Shareholder Report [Line Items]    
Fund Name Global Gold Fund  
Class Name Investor Class  
Trading Symbol BGEIX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Global Gold Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$810.66%
 
Expenses Paid, Amount $ 81  
Expense Ratio, Percent 0.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Gold Fund Investor Class returned 45.09% for the reporting period ended June 30, 2026.
The fund seeks to realize a total return (capital growth and dividends) consistent with investment in securities of companies that are engaged in mining, processing, fabricating or distributing gold or other precious metals throughout the world. The commentary below refers to the fund's performance compared to the NYSE Arca Gold Miners Index.
Gold's price finished the period significantly higher despite experiencing sharp volatility. Gold reached a record high approaching $5,600 per troy ounce in January, powered by central bank buying and investment demand. But increases in bond yields and the U.S. dollar combined to weigh on gold demand, which finished June at a little over $4,000.
Gold mining companies’ profits are highly levered to changes in the price of the underlying metal. That’s because production costs for miners are relatively fixed in the short run, so changes in gold prices typically result in disproportionately larger changes in gold miners’ operating profit. This dynamic meant gold companies’ stocks finished the period with sizable gains, but well off their January highs.
The portfolio’s holdings generally produced very strong absolute returns. Many of the positions that detracted from performance compared with the index were underweights to large, diversified gold producers, such as Barrick Mining, Newmont and First Majestic Silver. These stocks tended to hold up comparatively better during gold’s sell-off in the first half of 2026, and our relative lack of exposure hurt.
The leading contribution to relative results came from an underweight to Wheaton Precious Metals, whose gains trailed those of the index. This company doesn’t mine gold directly but operates a streaming model, where it buys production from miners at predetermined prices. The company’s premium valuation and debt issuance weighed on performance.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class45.09%18.63%10.96%
Regulatory Index
MSCI World21.34%11.47%13.14%
Performance Index
NYSE Arca Gold Miners (Total Return)49.73%20.28%12.60%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,447,067,805 $ 1,447,067,805
Holdings Count | holding 78 78
Advisory Fees Paid, Amount $ 10,446,923  
Investment Company, Portfolio Turnover 50.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.2%Canada50%
Short-Term Investments0.8%United States13%
Other Assets and Liabilities0.0%South Africa13%
Australia12%
United Kingdom5%
 
C000055503 [Member]    
Shareholder Report [Line Items]    
Fund Name Global Gold Fund  
Class Name I Class  
Trading Symbol AGGNX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Global Gold Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$560.46%
 
Expenses Paid, Amount $ 56  
Expense Ratio, Percent 0.46%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Gold Fund I Class returned 45.32% for the reporting period ended June 30, 2026.
The fund seeks to realize a total return (capital growth and dividends) consistent with investment in securities of companies that are engaged in mining, processing, fabricating or distributing gold or other precious metals throughout the world. The commentary below refers to the fund's performance compared to the NYSE Arca Gold Miners Index.
Gold's price finished the period significantly higher despite experiencing sharp volatility. Gold reached a record high approaching $5,600 per troy ounce in January, powered by central bank buying and investment demand. But increases in bond yields and the U.S. dollar combined to weigh on gold demand, which finished June at a little over $4,000.
Gold mining companies’ profits are highly levered to changes in the price of the underlying metal. That’s because production costs for miners are relatively fixed in the short run, so changes in gold prices typically result in disproportionately larger changes in gold miners’ operating profit. This dynamic meant gold companies’ stocks finished the period with sizable gains, but well off their January highs.
The portfolio’s holdings generally produced very strong absolute returns. Many of the positions that detracted from performance compared with the index were underweights to large, diversified gold producers, such as Barrick Mining, Newmont and First Majestic Silver. These stocks tended to hold up comparatively better during gold’s sell-off in the first half of 2026, and our relative lack of exposure hurt.
The leading contribution to relative results came from an underweight to Wheaton Precious Metals, whose gains trailed those of the index. This company doesn’t mine gold directly but operates a streaming model, where it buys production from miners at predetermined prices. The company’s premium valuation and debt issuance weighed on performance.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class45.32%18.87%11.18%
Regulatory Index
MSCI World21.34%11.47%13.14%
Performance Index
NYSE Arca Gold Miners (Total Return)49.73%20.28%12.60%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,447,067,805 $ 1,447,067,805
Holdings Count | holding 78 78
Advisory Fees Paid, Amount $ 10,446,923  
Investment Company, Portfolio Turnover 50.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.2%Canada50%
Short-Term Investments0.8%United States13%
Other Assets and Liabilities0.0%South Africa13%
Australia12%
United Kingdom5%
 
C000016472 [Member]    
Shareholder Report [Line Items]    
Fund Name Global Gold Fund  
Class Name A Class  
Trading Symbol ACGGX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Global Gold Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1110.91%
 
Expenses Paid, Amount $ 111  
Expense Ratio, Percent 0.91%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Gold Fund A Class returned 44.66% for the reporting period ended June 30, 2026.
The fund seeks to realize a total return (capital growth and dividends) consistent with investment in securities of companies that are engaged in mining, processing, fabricating or distributing gold or other precious metals throughout the world. The commentary below refers to the fund's performance compared to the NYSE Arca Gold Miners Index.
Gold's price finished the period significantly higher despite experiencing sharp volatility. Gold reached a record high approaching $5,600 per troy ounce in January, powered by central bank buying and investment demand. But increases in bond yields and the U.S. dollar combined to weigh on gold demand, which finished June at a little over $4,000.
Gold mining companies’ profits are highly levered to changes in the price of the underlying metal. That’s because production costs for miners are relatively fixed in the short run, so changes in gold prices typically result in disproportionately larger changes in gold miners’ operating profit. This dynamic meant gold companies’ stocks finished the period with sizable gains, but well off their January highs.
The portfolio’s holdings generally produced very strong absolute returns. Many of the positions that detracted from performance compared with the index were underweights to large, diversified gold producers, such as Barrick Mining, Newmont and First Majestic Silver. These stocks tended to hold up comparatively better during gold’s sell-off in the first half of 2026, and our relative lack of exposure hurt.
The leading contribution to relative results came from an underweight to Wheaton Precious Metals, whose gains trailed those of the index. This company doesn’t mine gold directly but operates a streaming model, where it buys production from miners at predetermined prices. The company’s premium valuation and debt issuance weighed on performance.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
The initial investment is adjusted to reflect the maximum initial sales charge.
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class44.66%18.33%10.69%
A Class - with sales charge36.34%16.94%10.03%
Regulatory Index
MSCI World21.34%11.47%13.14%
Performance Index
NYSE Arca Gold Miners (Total Return)49.73%20.28%12.60%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,447,067,805 $ 1,447,067,805
Holdings Count | holding 78 78
Advisory Fees Paid, Amount $ 10,446,923  
Investment Company, Portfolio Turnover 50.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.2%Canada50%
Short-Term Investments0.8%United States13%
Other Assets and Liabilities0.0%South Africa13%
Australia12%
United Kingdom5%
 
C000055505 [Member]    
Shareholder Report [Line Items]    
Fund Name Global Gold Fund  
Class Name C Class  
Trading Symbol AGYCX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Global Gold Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2021.66%
 
Expenses Paid, Amount $ 202  
Expense Ratio, Percent 1.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Gold Fund C Class returned 43.63% for the reporting period ended June 30, 2026.
The fund seeks to realize a total return (capital growth and dividends) consistent with investment in securities of companies that are engaged in mining, processing, fabricating or distributing gold or other precious metals throughout the world. The commentary below refers to the fund's performance compared to the NYSE Arca Gold Miners Index.
Gold's price finished the period significantly higher despite experiencing sharp volatility. Gold reached a record high approaching $5,600 per troy ounce in January, powered by central bank buying and investment demand. But increases in bond yields and the U.S. dollar combined to weigh on gold demand, which finished June at a little over $4,000.
Gold mining companies’ profits are highly levered to changes in the price of the underlying metal. That’s because production costs for miners are relatively fixed in the short run, so changes in gold prices typically result in disproportionately larger changes in gold miners’ operating profit. This dynamic meant gold companies’ stocks finished the period with sizable gains, but well off their January highs.
The portfolio’s holdings generally produced very strong absolute returns. Many of the positions that detracted from performance compared with the index were underweights to large, diversified gold producers, such as Barrick Mining, Newmont and First Majestic Silver. These stocks tended to hold up comparatively better during gold’s sell-off in the first half of 2026, and our relative lack of exposure hurt.
The leading contribution to relative results came from an underweight to Wheaton Precious Metals, whose gains trailed those of the index. This company doesn’t mine gold directly but operates a streaming model, where it buys production from miners at predetermined prices. The company’s premium valuation and debt issuance weighed on performance.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class43.63%17.44%9.86%
Regulatory Index
MSCI World21.34%11.47%13.14%
Performance Index
NYSE Arca Gold Miners (Total Return)49.73%20.28%12.60%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,447,067,805 $ 1,447,067,805
Holdings Count | holding 78 78
Advisory Fees Paid, Amount $ 10,446,923  
Investment Company, Portfolio Turnover 50.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.2%Canada50%
Short-Term Investments0.8%United States13%
Other Assets and Liabilities0.0%South Africa13%
Australia12%
United Kingdom5%
 
C000055506 [Member]    
Shareholder Report [Line Items]    
Fund Name Global Gold Fund  
Class Name R Class  
Trading Symbol AGGWX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Global Gold Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1421.16%
 
Expenses Paid, Amount $ 142  
Expense Ratio, Percent 1.16%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Global Gold Fund R Class returned 44.31% for the reporting period ended June 30, 2026.
The fund seeks to realize a total return (capital growth and dividends) consistent with investment in securities of companies that are engaged in mining, processing, fabricating or distributing gold or other precious metals throughout the world. The commentary below refers to the fund's performance compared to the NYSE Arca Gold Miners Index.
Gold's price finished the period significantly higher despite experiencing sharp volatility. Gold reached a record high approaching $5,600 per troy ounce in January, powered by central bank buying and investment demand. But increases in bond yields and the U.S. dollar combined to weigh on gold demand, which finished June at a little over $4,000.
Gold mining companies’ profits are highly levered to changes in the price of the underlying metal. That’s because production costs for miners are relatively fixed in the short run, so changes in gold prices typically result in disproportionately larger changes in gold miners’ operating profit. This dynamic meant gold companies’ stocks finished the period with sizable gains, but well off their January highs.
The portfolio’s holdings generally produced very strong absolute returns. Many of the positions that detracted from performance compared with the index were underweights to large, diversified gold producers, such as Barrick Mining, Newmont and First Majestic Silver. These stocks tended to hold up comparatively better during gold’s sell-off in the first half of 2026, and our relative lack of exposure hurt.
The leading contribution to relative results came from an underweight to Wheaton Precious Metals, whose gains trailed those of the index. This company doesn’t mine gold directly but operates a streaming model, where it buys production from miners at predetermined prices. The company’s premium valuation and debt issuance weighed on performance.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class44.31%18.05%10.41%
Regulatory Index
MSCI World21.34%11.47%13.14%
Performance Index
NYSE Arca Gold Miners (Total Return)49.73%20.28%12.60%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 1,447,067,805 $ 1,447,067,805
Holdings Count | holding 78 78
Advisory Fees Paid, Amount $ 10,446,923  
Investment Company, Portfolio Turnover 50.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Countries (as a % of net assets)
Common Stocks99.2%Canada50%
Short-Term Investments0.8%United States13%
Other Assets and Liabilities0.0%South Africa13%
Australia12%
United Kingdom5%
 
C000016484 [Member]    
Shareholder Report [Line Items]    
Fund Name Small Company Fund  
Class Name Investor Class  
Trading Symbol ASQIX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Small Company Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$1040.86%
 
Expenses Paid, Amount $ 104  
Expense Ratio, Percent 0.86%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Small Company Fund Investor Class returned 42.57% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing primarily in common stocks of small companies. The commentary below refers to the fund's performance compared to the Russell 2000 Index.
The industrials sector was the leading contributor to the fund's relative performance, driven primarily by strong security selection. Stock picks and an overweight to the construction and engineering industry made these stocks particularly strong contributors. Sterling Infrastructure, a construction and infrastructure services company, was the top contributor to the fund's overall performance.
The consumer discretionary sector also contributed positively to relative performance, with security selection contributing meaningfully. Stock picks within the hotels, restaurants and leisure and specialty retail industries made a notable positive contribution in the sector.
Security selection in the health care sector was a meaningful detractor from relative performance. Positioning in the biotechnology industry was the most significant source of weakness within health care. Health care providers and services company Option Care Health was a notable individual detractor.
The information technology sector also detracted from relative performance, led by security selection. The software industry was the main source of weakness, as Q2 Holdings, a provider of digital banking and lending solutions, ranked among the top detractors for the fund overall.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class42.57%7.43%10.32%
Regulatory Index
Russell 300022.81%12.30%15.06%
Performance Index
Russell 200040.78%6.98%11.62%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 195,387,257 $ 195,387,257
Holdings Count | holding 309 309
Advisory Fees Paid, Amount $ 1,364,989  
Investment Company, Portfolio Turnover 94.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Semiconductors and Semiconductor Equipment8%
Rights0.0%Banks7%
Short-Term Investments1.3%Biotechnology7%
Other Assets and Liabilities(0.6)%Construction and Engineering6%
Software6%
 
C000016486 [Member]    
Shareholder Report [Line Items]    
Fund Name Small Company Fund  
Class Name I Class  
Trading Symbol ASCQX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Small Company Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
I Class$800.66%
 
Expenses Paid, Amount $ 80  
Expense Ratio, Percent 0.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Small Company Fund I Class returned 42.87% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing primarily in common stocks of small companies. The commentary below refers to the fund's performance compared to the Russell 2000 Index.
The industrials sector was the leading contributor to the fund's relative performance, driven primarily by strong security selection. Stock picks and an overweight to the construction and engineering industry made these stocks particularly strong contributors. Sterling Infrastructure, a construction and infrastructure services company, was the top contributor to the fund's overall performance.
The consumer discretionary sector also contributed positively to relative performance, with security selection contributing meaningfully. Stock picks within the hotels, restaurants and leisure and specialty retail industries made a notable positive contribution in the sector.
Security selection in the health care sector was a meaningful detractor from relative performance. Positioning in the biotechnology industry was the most significant source of weakness within health care. Health care providers and services company Option Care Health was a notable individual detractor.
The information technology sector also detracted from relative performance, led by security selection. The software industry was the main source of weakness, as Q2 Holdings, a provider of digital banking and lending solutions, ranked among the top detractors for the fund overall.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
I Class42.87%7.64%10.54%
Regulatory Index
Russell 300022.81%12.30%15.06%
Performance Index
Russell 200040.78%6.98%11.62%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 195,387,257 $ 195,387,257
Holdings Count | holding 309 309
Advisory Fees Paid, Amount $ 1,364,989  
Investment Company, Portfolio Turnover 94.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Semiconductors and Semiconductor Equipment8%
Rights0.0%Banks7%
Short-Term Investments1.3%Biotechnology7%
Other Assets and Liabilities(0.6)%Construction and Engineering6%
Software6%
 
C000016485 [Member]    
Shareholder Report [Line Items]    
Fund Name Small Company Fund  
Class Name A Class  
Trading Symbol ASQAX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Small Company Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
A Class$1341.11%
 
Expenses Paid, Amount $ 134  
Expense Ratio, Percent 1.11%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Small Company Fund A Class returned 42.15% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing primarily in common stocks of small companies. The commentary below refers to the fund's performance compared to the Russell 2000 Index.
The industrials sector was the leading contributor to the fund's relative performance, driven primarily by strong security selection. Stock picks and an overweight to the construction and engineering industry made these stocks particularly strong contributors. Sterling Infrastructure, a construction and infrastructure services company, was the top contributor to the fund's overall performance.
The consumer discretionary sector also contributed positively to relative performance, with security selection contributing meaningfully. Stock picks within the hotels, restaurants and leisure and specialty retail industries made a notable positive contribution in the sector.
Security selection in the health care sector was a meaningful detractor from relative performance. Positioning in the biotechnology industry was the most significant source of weakness within health care. Health care providers and services company Option Care Health was a notable individual detractor.
The information technology sector also detracted from relative performance, led by security selection. The software industry was the main source of weakness, as Q2 Holdings, a provider of digital banking and lending solutions, ranked among the top detractors for the fund overall.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
The initial investment is adjusted to reflect the maximum initial sales charge.
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
A Class42.15%7.15%10.05%
A Class - with sales charge33.98%5.89%9.40%
Regulatory Index
Russell 300022.81%12.30%15.06%
Performance Index
Russell 200040.78%6.98%11.62%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 195,387,257 $ 195,387,257
Holdings Count | holding 309 309
Advisory Fees Paid, Amount $ 1,364,989  
Investment Company, Portfolio Turnover 94.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Semiconductors and Semiconductor Equipment8%
Rights0.0%Banks7%
Short-Term Investments1.3%Biotechnology7%
Other Assets and Liabilities(0.6)%Construction and Engineering6%
Software6%
 
C000088007 [Member]    
Shareholder Report [Line Items]    
Fund Name Small Company Fund  
Class Name C Class  
Trading Symbol ASQCX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Small Company Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
C Class$2241.86%
 
Expenses Paid, Amount $ 224  
Expense Ratio, Percent 1.86%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Small Company Fund C Class returned 41.08% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing primarily in common stocks of small companies. The commentary below refers to the fund's performance compared to the Russell 2000 Index.
The industrials sector was the leading contributor to the fund's relative performance, driven primarily by strong security selection. Stock picks and an overweight to the construction and engineering industry made these stocks particularly strong contributors. Sterling Infrastructure, a construction and infrastructure services company, was the top contributor to the fund's overall performance.
The consumer discretionary sector also contributed positively to relative performance, with security selection contributing meaningfully. Stock picks within the hotels, restaurants and leisure and specialty retail industries made a notable positive contribution in the sector.
Security selection in the health care sector was a meaningful detractor from relative performance. Positioning in the biotechnology industry was the most significant source of weakness within health care. Health care providers and services company Option Care Health was a notable individual detractor.
The information technology sector also detracted from relative performance, led by security selection. The software industry was the main source of weakness, as Q2 Holdings, a provider of digital banking and lending solutions, ranked among the top detractors for the fund overall.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
C Class41.08%6.37%9.22%
Regulatory Index
Russell 300022.81%12.30%15.06%
Performance Index
Russell 200040.78%6.98%11.62%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 195,387,257 $ 195,387,257
Holdings Count | holding 309 309
Advisory Fees Paid, Amount $ 1,364,989  
Investment Company, Portfolio Turnover 94.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Semiconductors and Semiconductor Equipment8%
Rights0.0%Banks7%
Short-Term Investments1.3%Biotechnology7%
Other Assets and Liabilities(0.6)%Construction and Engineering6%
Software6%
 
C000016487 [Member]    
Shareholder Report [Line Items]    
Fund Name Small Company Fund  
Class Name R Class  
Trading Symbol ASCRX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Small Company Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R Class$1641.36%
 
Expenses Paid, Amount $ 164  
Expense Ratio, Percent 1.36%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Small Company Fund R Class returned 41.79% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing primarily in common stocks of small companies. The commentary below refers to the fund's performance compared to the Russell 2000 Index.
The industrials sector was the leading contributor to the fund's relative performance, driven primarily by strong security selection. Stock picks and an overweight to the construction and engineering industry made these stocks particularly strong contributors. Sterling Infrastructure, a construction and infrastructure services company, was the top contributor to the fund's overall performance.
The consumer discretionary sector also contributed positively to relative performance, with security selection contributing meaningfully. Stock picks within the hotels, restaurants and leisure and specialty retail industries made a notable positive contribution in the sector.
Security selection in the health care sector was a meaningful detractor from relative performance. Positioning in the biotechnology industry was the most significant source of weakness within health care. Health care providers and services company Option Care Health was a notable individual detractor.
The information technology sector also detracted from relative performance, led by security selection. The software industry was the main source of weakness, as Q2 Holdings, a provider of digital banking and lending solutions, ranked among the top detractors for the fund overall.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
R Class41.79%6.88%9.77%
Regulatory Index
Russell 300022.81%12.30%15.06%
Performance Index
Russell 200040.78%6.98%11.62%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 195,387,257 $ 195,387,257
Holdings Count | holding 309 309
Advisory Fees Paid, Amount $ 1,364,989  
Investment Company, Portfolio Turnover 94.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Semiconductors and Semiconductor Equipment8%
Rights0.0%Banks7%
Short-Term Investments1.3%Biotechnology7%
Other Assets and Liabilities(0.6)%Construction and Engineering6%
Software6%
 
C000189764 [Member]    
Shareholder Report [Line Items]    
Fund Name Small Company Fund  
Class Name R5 Class  
Trading Symbol ASQGX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Small Company Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
R5 Class$800.66%
 
Expenses Paid, Amount $ 80  
Expense Ratio, Percent 0.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Small Company Fund R5 Class returned 42.81% for the reporting period ended June 30, 2026.
The fund seeks long-term capital growth by investing primarily in common stocks of small companies. The commentary below refers to the fund's performance compared to the Russell 2000 Index.
The industrials sector was the leading contributor to the fund's relative performance, driven primarily by strong security selection. Stock picks and an overweight to the construction and engineering industry made these stocks particularly strong contributors. Sterling Infrastructure, a construction and infrastructure services company, was the top contributor to the fund's overall performance.
The consumer discretionary sector also contributed positively to relative performance, with security selection contributing meaningfully. Stock picks within the hotels, restaurants and leisure and specialty retail industries made a notable positive contribution in the sector.
Security selection in the health care sector was a meaningful detractor from relative performance. Positioning in the biotechnology industry was the most significant source of weakness within health care. Health care providers and services company Option Care Health was a notable individual detractor.
The information technology sector also detracted from relative performance, led by security selection. The software industry was the main source of weakness, as Q2 Holdings, a provider of digital banking and lending solutions, ranked among the top detractors for the fund overall.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
April 10, 2017 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 YearSince InceptionInception Date
R5 Class42.81%7.64%9.32%4/10/17
Regulatory Index
Russell 300022.81%12.30%14.70%
Performance Index
Russell 200040.78%6.98%10.46%
 
Performance Inception Date   Apr. 10, 2017
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 195,387,257 $ 195,387,257
Holdings Count | holding 309 309
Advisory Fees Paid, Amount $ 1,364,989  
Investment Company, Portfolio Turnover 94.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Industries (as a % of net assets)
Common Stocks99.3%Semiconductors and Semiconductor Equipment8%
Rights0.0%Banks7%
Short-Term Investments1.3%Biotechnology7%
Other Assets and Liabilities(0.6)%Construction and Engineering6%
Software6%
 
C000016488 [Member]    
Shareholder Report [Line Items]    
Fund Name Utilities Fund  
Class Name Investor Class  
Trading Symbol BULIX  
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Utilities Fund for the period of July 1, 2025 to June 30, 2026.  
Shareholder Report Annual or Semi-Annual annual shareholder report  
Additional Information [Text Block] You can find additional information about the fund at americancentury.com/docs. You can also request this information by contacting us at 1-800-345-2021.  
Additional Information Phone Number 1-800-345-2021  
Additional Information Website americancentury.com/docs  
Expenses [Text Block]
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investor Class$710.66%
 
Expenses Paid, Amount $ 71  
Expense Ratio, Percent 0.66%  
Factors Affecting Performance [Text Block]
What were the key factors that affected the fund’s performance?
Utilities Fund Investor Class returned 14.99% for the reporting period ended June 30, 2026.
The fund seeks current income and long-term growth of capital and income. The fund invests at least 80% of its assets in equity securities of companies engaged in the utilities industry. The commentary below refers to the fund's performance compared to the S&P 500 Utilities Index.
Utilities stocks performed well but lagged the broader market. These stocks continued to benefit from surging demand for electricity from data center construction, manufacturing resurgence and electrification of transportation and buildings.
Nevertheless, the stocks underperformed the broader market because, after performing so well in recent years, utilities stocks’ dividends and valuations were stretched relative to history. In addition, there were concerns about the companies’ exposure to regulatory risk and ability to pass on the price hikes needed to fund electric infrastructure expansion.
The top detractors from relative results were underweight positions in NextEra Energy and Sempra. NextEra’s stock surged amid strong demand for its clean power and news of a major acquisition. Sempra announced big infrastructure spending plans and the expansion of its liquefied natural gas business.
At the other end of the spectrum, the leading contribution to the portfolio's relative performance came from an underweight position in Constellation Energy. Constellation produced disappointing results amid operational delays and costs associated with its acquisition of Calpine.
 
Line Graph [Table Text Block]
Cumulative Performance (based on an initial $10,000 investment)
June 30, 2016 through June 30, 2026
10
 
Average Annual Return [Table Text Block]
Average Annual Total Returns
1 Year5 Year10 Year
Investor Class14.99%9.35%6.49%
Regulatory Index
S&P 50022.32%13.41%15.51%
Performance Index
S&P 500 Utilities14.22%10.84%9.11%
 
No Deduction of Taxes [Text Block] The opinions expressed are those of American Century Investments and are no guarantee of the future performance of any American Century Investments fund. This information is for educational purposes only and is not intended as investment advice. Data reflects past performance, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value will fluctuate and redemption value may be more or less than original cost, and none of the charts reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.  
Updated Performance Information Location [Text Block] Visit americancentury.com for more recent performance information.  
Net Assets $ 299,237,703 $ 299,237,703
Holdings Count | holding 37 37
Advisory Fees Paid, Amount $ 1,923,897  
Investment Company, Portfolio Turnover 69.00%  
Holdings [Text Block]
Fund Holdings
Types of Investments in Portfolio (as a % of net assets)
Top Five Sub-Industries (as a % of net assets)
Common Stocks99.3%Electric Utilities59%
Short-Term Investments0.4%Multi-Utilities22%
Other Assets and Liabilities0.3%Independent Power Producers and Energy Traders8%
Gas Utilities8%
Water Utilities2%