v3.26.1
Average Annual Total Returns - American Century Capital Portfolios Prospectus
 12 Months Ended 45 Months Ended 46 Months Ended 60 Months Ended 77 Months Ended 81 Months Ended 120 Months Ended
Aug. 01, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000 Index                
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% 12.65%   13.15%     14.29%
Russell 3000 Value Index                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Russell 3000® Value Index   (reflects no deduction for fees, expenses or taxes)              
Average Annual Return, Percent   15.71%     11.18%     10.46%
Russell 1000 Index                
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 Value Index                
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%
Russell Midcap Value Index                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Russell Midcap® Value Index   (reflects no deduction for fees, expenses or taxes)              
Average Annual Return, Percent   11.05%     9.83%     9.78%
Russell 2000 Value Index                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Russell 2000® Value Index   (reflects no deduction for fees, expenses or taxes)              
Average Annual Return, Percent   12.59% 5.94%   8.88%     9.27%
EQUITY INCOME FUND INVESTOR CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes              
Average Annual Return, Percent   11.91%     7.77%     8.97%
Performance Inception Date Aug. 01, 1994              
EQUITY INCOME 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   9.21%     5.49%     6.81%
Performance Inception Date Aug. 01, 1994              
EQUITY INCOME 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   8.69%     5.77%     6.76%
Performance Inception Date Aug. 01, 1994              
EQUITY INCOME FUND I CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] I Class Return Before Taxes              
Average Annual Return, Percent   12.10%     7.97%     9.19%
Performance Inception Date Jul. 08, 1998              
EQUITY INCOME FUND, Y CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [1] Y Class1 Return Before Taxes              
Average Annual Return, Percent [1]   12.39%     8.15%     9.35%
Performance Inception Date [1] Apr. 10, 2017              
EQUITY INCOME FUND A CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] A Class Return Before Taxes              
Average Annual Return, Percent   5.21%     6.23%     8.06%
Performance Inception Date Mar. 07, 1997              
EQUITY INCOME FUND C CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [2] C Class2  Return Before Taxes              
Average Annual Return, Percent [2]   10.78%     6.70%     8.05%
Performance Inception Date [2] Jul. 13, 2001              
EQUITY INCOME FUND R CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R Class Return Before Taxes              
Average Annual Return, Percent   11.28%     7.22%     8.42%
Performance Inception Date Aug. 29, 2003              
EQUITY INCOME FUND, R5 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [3] R5 Class3 Return Before Taxes              
Average Annual Return, Percent [3]   12.13%     7.98%     9.19%
Performance Inception Date [3] Apr. 10, 2017              
EQUITY INCOME FUND R6 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes              
Average Annual Return, Percent   12.26%     8.12%     9.34%
Performance Inception Date Jul. 26, 2013              
EQUITY INCOME FUND G CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] G Class Return Before Taxes              
Average Annual Return, Percent   12.91%     8.76% 8.31%    
Performance Inception Date Aug. 01, 2019              
FOCUSED LARGE CAP VALUE FUND INVESTOR CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes              
Average Annual Return, Percent   16.41%     10.46%     9.76%
Performance Inception Date Jul. 30, 1999              
FOCUSED LARGE CAP 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   13.04%     7.34%     7.73%
Performance Inception Date Jul. 30, 1999              
FOCUSED LARGE CAP 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   11.72%     7.53%     7.46%
Performance Inception Date Jul. 30, 1999              
FOCUSED LARGE CAP VALUE FUND I CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] I Class Return Before Taxes              
Average Annual Return, Percent   16.62%     10.72%     10.00%
Performance Inception Date Aug. 10, 2001              
FOCUSED LARGE CAP VALUE FUND A CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] A Class Return Before Taxes              
Average Annual Return, Percent   9.44%     8.91%     8.86%
Performance Inception Date Oct. 26, 2000              
FOCUSED LARGE CAP VALUE FUND C CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [4] C Class1 Return Before Taxes              
Average Annual Return, Percent [4]   15.23%     9.40%     8.84%
Performance Inception Date [4] Nov. 07, 2001              
FOCUSED LARGE CAP VALUE FUND R CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R Class Return Before Taxes              
Average Annual Return, Percent   15.79%     9.94%     9.23%
Performance Inception Date Aug. 29, 2003              
FOCUSED LARGE CAP VALUE FUND, R5 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [5] R5 Class2 Return Before Taxes              
Average Annual Return, Percent [5]   16.60%     10.69%     9.99%
Performance Inception Date [5] Apr. 10, 2017              
FOCUSED LARGE CAP VALUE FUND R6 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes              
Average Annual Return, Percent   16.81%     10.87%     10.15%
Performance Inception Date Jul. 26, 2013              
FOCUSED LARGE CAP VALUE FUND G CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] G Class Return Before Taxes              
Average Annual Return, Percent   17.34%   10.49%        
Performance Inception Date Mar. 15, 2022              
MID CAP VALUE FUND INVESTOR CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes              
Average Annual Return, Percent   8.89%     8.77%     9.04%
Performance Inception Date Mar. 31, 2004              
MID CAP 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   5.33%     5.80%     6.82%
Performance Inception Date Mar. 31, 2004              
MID CAP 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   7.36%     6.44%     6.90%
Performance Inception Date Mar. 31, 2004              
MID CAP VALUE FUND I CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] I Class Return Before Taxes              
Average Annual Return, Percent   9.09%     8.98%     9.26%
Performance Inception Date Aug. 02, 2004              
MID CAP VALUE FUND, Y CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [6] Y Class1 Return Before Taxes              
Average Annual Return, Percent [6]   9.25%     9.15%     9.42%
Performance Inception Date [6] Apr. 10, 2017              
MID CAP VALUE FUND A CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] A Class Return Before Taxes              
Average Annual Return, Percent   2.39%     7.21%     8.13%
Performance Inception Date Jan. 13, 2005              
MID CAP VALUE FUND C CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [7] C Class2 Return Before Taxes              
Average Annual Return, Percent [7]   7.84%     7.68%     8.12%
Performance Inception Date [7] Mar. 01, 2010              
MID CAP VALUE FUND R CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R Class Return Before Taxes              
Average Annual Return, Percent   8.34%     8.22%     8.50%
Performance Inception Date Jul. 29, 2005              
MID CAP VALUE FUND, R5 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [8] R5 Class3 Return Before Taxes              
Average Annual Return, Percent [8]   9.09%     8.98%     9.26%
Performance Inception Date [8] Apr. 10, 2017              
MID CAP VALUE FUND R6 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes              
Average Annual Return, Percent   9.34%     9.15%     9.43%
Performance Inception Date Jul. 26, 2013              
MID CAP VALUE FUND G CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] G Class Return Before Taxes              
Average Annual Return, Percent   9.93%   7.07%        
Performance Inception Date Mar. 15, 2022              
SMALL CAP DIVIDEND FUND INVESTOR CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes              
Average Annual Return, Percent   (4.41%) 2.38%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP DIVIDEND 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   (5.09%) 1.75%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP DIVIDEND 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   (2.30%) 1.72%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP DIVIDEND FUND I CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] I Class Return Before Taxes              
Average Annual Return, Percent   (4.13%) 2.61%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP DIVIDEND FUND A CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] A Class Return Before Taxes              
Average Annual Return, Percent   (10.05%) 0.53%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP DIVIDEND FUND R CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R Class Return Before Taxes              
Average Annual Return, Percent   (4.90%) 1.88%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP DIVIDEND FUND R6 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes              
Average Annual Return, Percent   (4.08%) 2.74%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP DIVIDEND FUND G CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] G Class Return Before Taxes              
Average Annual Return, Percent   (3.36%) 3.49%          
Performance Inception Date Apr. 05, 2022              
SMALL CAP VALUE FUND INVESTOR CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes              
Average Annual Return, Percent   (3.27%)     7.04%     8.94%
Performance Inception Date Jul. 31, 1998              
SMALL CAP 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   (6.09%)     5.34%     6.92%
Performance Inception Date Jul. 31, 1998              
SMALL CAP 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   0.13%     5.35%     6.69%
Performance Inception Date Jul. 31, 1998              
SMALL CAP VALUE FUND I CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] I Class Return Before Taxes              
Average Annual Return, Percent   (3.14%)     7.23%     9.16%
Performance Inception Date Oct. 26, 1998              
SMALL CAP VALUE FUND, Y CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [9] Y Class1 Return Before Taxes              
Average Annual Return, Percent [9]   (2.99%)     7.40%     9.32%
Performance Inception Date [9] Apr. 10, 2017              
SMALL CAP VALUE FUND A CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] A Class Return Before Taxes              
Average Annual Return, Percent   (9.11%)     5.52%     8.03%
Performance Inception Date Dec. 31, 1999              
SMALL CAP VALUE FUND C CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [10] C Class2 Return Before Taxes              
Average Annual Return, Percent [10]   (4.34%)     5.95%     8.02%
Performance Inception Date [10] Mar. 01, 2010              
SMALL CAP VALUE FUND R CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R Class Return Before Taxes              
Average Annual Return, Percent   (3.74%)     6.49%     8.40%
Performance Inception Date Mar. 01, 2010              
SMALL CAP VALUE FUND, R5 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [11] R5 Class3 Return Before Taxes              
Average Annual Return, Percent [11]   (3.14%)     7.22%     9.16%
Performance Inception Date [11] Apr. 10, 2017              
SMALL CAP VALUE FUND R6 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes              
Average Annual Return, Percent   (2.98%)     7.41%     9.33%
Performance Inception Date Jul. 26, 2013              
SMALL CAP VALUE FUND, G CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] G Class Return Before Taxes              
Average Annual Return, Percent   (2.26%)     8.18%   9.79%  
Performance Inception Date Apr. 01, 2019              
VALUE FUND INVESTOR CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes              
Average Annual Return, Percent   15.79%     11.32%     9.94%
Performance Inception Date Sep. 01, 1993              
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   13.21%     8.43%     7.66%
Performance Inception Date Sep. 01, 1993              
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   11.14%     8.47%     7.57%
Performance Inception Date Sep. 01, 1993              
VALUE FUND I CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] I Class Return Before Taxes              
Average Annual Return, Percent   15.96%     11.53%     10.15%
Performance Inception Date Jul. 31, 1997              
VALUE FUND, Y CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [12] Y Class1 Return Before Taxes              
Average Annual Return, Percent [12]   16.13%     11.70%     10.31%
Performance Inception Date [12] Apr. 10, 2017              
VALUE FUND A CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] A Class Return Before Taxes              
Average Annual Return, Percent   8.75%     9.72%     9.01%
Performance Inception Date Oct. 02, 1996              
VALUE FUND C CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [13] C Class2 Return Before Taxes              
Average Annual Return, Percent [13]   14.54%     10.21%     9.01%
Performance Inception Date [13] Jun. 04, 2001              
VALUE FUND R CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R Class Return Before Taxes              
Average Annual Return, Percent   15.08%     10.74%     9.39%
Performance Inception Date Jul. 29, 2005              
VALUE FUND, R5 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] [14] R5 Class3 Return Before Taxes              
Average Annual Return, Percent [14]   15.98%     11.54%     10.14%
Performance Inception Date [14] Apr. 10, 2017              
VALUE FUND R6 CLASS                
Prospectus [Line Items]                
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes              
Average Annual Return, Percent   16.13%     11.70%     10.31%
Performance Inception Date Jul. 26, 2013              
[1] Historical performance for the Y Class prior to its inception is based on the performance of R6 Class shares, which have the same expenses as the Y Class shares. Since inception performance for the Y Class is based on the R6 Class inception date.
[2] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[3] 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.
[4] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[5] 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.
[6] Historical performance for the Y Class prior to its inception is based on the performance of R6 Class shares, which have the same expenses as the Y Class shares. Since inception performance for the Y Class is based on the R6 Class inception date.
[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] 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
[9] Historical performance for the Y Class prior to its inception is based on the performance of the R6 Class shares, which have the same expenses as the Y Class shares. Since inception performance for the Y Class is based on the R6 Class inception date.
[10] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion. 
[11] 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.
[12] Historical performance for the Y Class prior to its inception is based on the performance of the R6 Class shares, which have the same expenses as the Y Class shares. Since inception performance for the Y Class is based on the R6 Class inception date.
[13] C Class shares automatically convert to A Class shares after approximately eight years. All returns for periods greater than eight years reflect this conversion.
[14] 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.