v3.26.3
Average Annual Total Returns - American Century Quantitative Equity Funds Prospectus
 12 Months Ended 60 Months Ended 105 Months Ended 120 Months Ended
Nov. 01, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500® Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] S&P 500® Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   17.88% 14.42%   14.82%
Russell 1000® Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Russell 1000® Index     (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   17.37% 13.59%   14.59%
Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Russell 1000® Growth Index    (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   18.56% 15.32%   18.13%
Russell 1000® Value Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Russell 1000® Value Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   15.91% 11.33%   10.53%
MSCI World Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] MSCI World Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   21.09% 12.15%   12.17%
NYSE Arca Gold Miners Index (Total Return) (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] NYSE Arca Gold Miners Index (Total Return)   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   159.06% 21.80%   22.27%
Russell 3000® Index3 (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Russell 3000® Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   17.15% 13.15%   14.29%
Russell 2000® Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Russell 2000® Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   12.81% 6.09%   9.62%
S&P 500® Utilities Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] S&P 500® Utilities - SEC Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   16.04% 9.73%   10.61%
DISCIPLINED CORE EQUITY FUND INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   18.42% 12.36%   12.70%
DISCIPLINED CORE EQUITY FUND INVESTOR CLASS | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   15.42% 9.70%   10.13%
DISCIPLINED CORE EQUITY FUND INVESTOR CLASS | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares        
Average Annual Return, Percent   12.91% 9.07%   9.62%
DISCIPLINED CORE EQUITY FUND I CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] I Class Return Before Taxes        
Average Annual Return, Percent   18.66% 12.58%   12.92%
DISCIPLINED CORE EQUITY FUND A CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] A Class Return Before Taxes        
Average Annual Return, Percent   11.35% 10.76%   11.75%
DISCIPLINED CORE EQUITY FUND C CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [1] C Class1 Return Before Taxes        
Average Annual Return, Percent [1]   17.22% 11.24%   11.75%
DISCIPLINED CORE EQUITY FUND R CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R Class Return Before Taxes        
Average Annual Return, Percent   17.84% 11.80%   12.14%
DISCIPLINED CORE EQUITY FUND R5 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [2] R5 Class2 Return Before Taxes        
Average Annual Return, Percent [2]   18.65% 12.58%   12.92%
Performance Inception Date [2] Apr. 10, 2017        
DISCIPLINED GROWTH FUND INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   17.20% 13.33%   15.36%
Performance Inception Date Sep. 30, 2005        
DISCIPLINED GROWTH FUND INVESTOR CLASS | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   13.84% 9.88%   12.12%
Performance Inception Date Sep. 30, 2005        
DISCIPLINED GROWTH FUND INVESTOR CLASS | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares        
Average Annual Return, Percent   12.56% 10.08%   11.90%
Performance Inception Date Sep. 30, 2005        
DISCIPLINED GROWTH FUND I CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] I Class Return Before Taxes        
Average Annual Return, Percent   17.46% 13.57%   15.60%
Performance Inception Date Sep. 30, 2005        
DISCIPLINED GROWTH FUND Y CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Y Class Return Before Taxes        
Average Annual Return, Percent   17.50% 13.62% 15.87%  
Performance Inception Date Apr. 10, 2017        
DISCIPLINED GROWTH FUND A CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] A Class Return Before Taxes        
Average Annual Return, Percent   10.23% 11.73%   14.40%
Performance Inception Date Sep. 30, 2005        
DISCIPLINED GROWTH FUND C CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [3] C Class1 Return Before Taxes        
Average Annual Return, Percent [3]   16.05% 12.21%   14.39%
Performance Inception Date [3] Sep. 28, 2007        
DISCIPLINED GROWTH FUND R CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R Class Return Before Taxes        
Average Annual Return, Percent   16.60% 12.77%   14.79%
Performance Inception Date Sep. 30, 2005        
DISCIPLINED GROWTH FUND R5 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [4] R5 Class2 Return Before Taxes        
Average Annual Return, Percent [4]   17.43% 13.56%   15.60%
Performance Inception Date [4] Apr. 10, 2017        
DISCIPLINED VALUE FUND INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   14.92% 8.82%   10.45%
DISCIPLINED VALUE FUND INVESTOR CLASS | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   12.55% 6.50%   8.09%
DISCIPLINED VALUE FUND INVESTOR CLASS | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares        
Average Annual Return, Percent   10.39% 6.28%   7.80%
DISCIPLINED VALUE FUND I CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] I Class Return Before Taxes        
Average Annual Return, Percent   15.14% 9.03%   10.67%
DISCIPLINED VALUE FUND A CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] A Class Return Before Taxes        
Average Annual Return, Percent   8.03% 7.27%   9.52%
DISCIPLINED VALUE FUND C CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [5] C Class1 Return Before Taxes        
Average Annual Return, Percent [5]   13.74% 7.74%   9.51%
DISCIPLINED VALUE FUND R CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R Class Return Before Taxes        
Average Annual Return, Percent   14.36% 8.28%   9.89%
DISCIPLINED VALUE FUND R5 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [6] R5 Class2 Return Before Taxes        
Average Annual Return, Percent [6]   15.14% 9.03%   10.67%
Performance Inception Date Apr. 10, 2017        
GLOBAL GOLD FUND INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   158.48% 20.58%   20.67%
GLOBAL GOLD FUND INVESTOR CLASS | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   158.00% 20.29%   19.99%
GLOBAL GOLD FUND INVESTOR CLASS | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares        
Average Annual Return, Percent   94.27% 16.78%   17.49%
GLOBAL GOLD FUND I CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] I Class Return Before Taxes        
Average Annual Return, Percent   158.94% 20.82%   20.91%
GLOBAL GOLD FUND A CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] A Class Return Before Taxes        
Average Annual Return, Percent   142.86% 18.86%   19.67%
GLOBAL GOLD FUND C CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [7] C Class1 Return Before Taxes        
Average Annual Return, Percent [7]   155.78% 19.38%   19.64%
GLOBAL GOLD FUND R CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R Class Return Before Taxes        
Average Annual Return, Percent   157.06% 19.98%   20.07%
SMALL COMPANY FUND INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   12.93% 6.35%   7.80%
SMALL COMPANY FUND INVESTOR CLASS | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   12.26% 5.33%   6.82%
SMALL COMPANY FUND INVESTOR CLASS | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares        
Average Annual Return, Percent   8.14% 4.87%   6.13%
SMALL COMPANY FUND I CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] I Class Return Before Taxes        
Average Annual Return, Percent   13.19% 6.57%   8.02%
SMALL COMPANY FUND A CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] A Class Return Before Taxes        
Average Annual Return, Percent   6.20% 4.84%   6.90%
SMALL COMPANY FUND C CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [8] C Class1 Return Before Taxes        
Average Annual Return, Percent [8]   11.81% 5.29%   6.89%
SMALL COMPANY FUND R CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R Class Return Before Taxes        
Average Annual Return, Percent   12.40% 5.83%   7.27%
SMALL COMPANY FUND R5 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [9] R5 Class2 Return Before Taxes        
Average Annual Return, Percent [9]   13.18% 6.57%   8.02%
Performance Inception Date Apr. 10, 2017        
UTILITIES FUND INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   16.81% 7.72%   7.86%
UTILITIES FUND INVESTOR CLASS | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   13.76% 6.14%   6.28%
UTILITIES FUND INVESTOR CLASS | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares        
Average Annual Return, Percent   11.92% 5.82%   6.02%
[1] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[2] Historical performance for the R5 Class prior to its inception (April 10, 2017) is based on the performance of I Class shares, which have the same expenses as the R5 Class shares.
[3] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[4] Historical performance for the R5 Class prior to its inception is based on the performance of I Class shares, which have the same expenses as the R5 Class shares.
[5] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[6] Historical performance for the R5 Class prior to its inception (April 10, 2017) is based on the performance of I Class shares, which have the same expenses as the R5 Class shares.
[7] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[8] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[9] Historical performance for the R5 Class prior to its inception (April 10, 2017) is based on the performance of I Class shares, which have the same expenses as the R5 Class shares.