v3.25.4
Average Annual Total Returns - American Century Capital Portfolios Prospectus
 12 Months Ended 46 Months Ended 60 Months Ended 120 Months Ended
Mar. 01, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P Developed REIT Index          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] S&P Developed REIT Index   (reflects no deduction for fees, expenses or taxes)        
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%   13.15% 14.29%
FTSE Nareit All Equity REITs Index          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] FTSE Nareit All Equity REITs Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   2.27%   4.85% 5.77%
GLOBAL REAL ESTATE FUND, INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   6.64%   4.71% 5.69%
Performance Inception Date Apr. 29, 2011        
GLOBAL REAL ESTATE 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   5.55%   3.38% 4.36%
Performance Inception Date Apr. 29, 2011        
GLOBAL REAL ESTATE 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   4.12%   3.33% 4.04%
Performance Inception Date Apr. 29, 2011        
GLOBAL REAL ESTATE FUND, INVESTOR CLASS | MSCI ACWI Index          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] MSCI ACWI Index   (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   22.34%   11.19% 11.72%
GLOBAL REAL ESTATE FUND, INVESTOR CLASS | S&P Developed REIT Index          
Prospectus [Line Items]          
Average Annual Return, Percent   6.91%   3.76% 3.81%
GLOBAL REAL ESTATE FUND, I CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] I Class Return Before Taxes        
Average Annual Return, Percent   6.84%   4.92% 5.90%
Performance Inception Date Apr. 29, 2011        
GLOBAL REAL ESTATE FUND, Y CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [1] Y Class1 Return Before Taxes        
Average Annual Return, Percent [1]   7.00%   5.07% 6.05%
Performance Inception Date [1] Apr. 10, 2017        
GLOBAL REAL ESTATE FUND, A CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] A Class Return Before Taxes        
Average Annual Return, Percent   0.26%   3.22% 4.80%
Performance Inception Date Apr. 29, 2011        
GLOBAL REAL ESTATE FUND, C CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [2] C Class2 Return Before Taxes        
Average Annual Return, Percent [2]   5.60%   3.67% 4.79%
Performance Inception Date [2] Apr. 29, 2011        
GLOBAL REAL ESTATE FUND, R CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R Class Return Before Taxes        
Average Annual Return, Percent   6.03%   4.17% 5.16%
Performance Inception Date Apr. 29, 2011        
GLOBAL REAL ESTATE FUND, R5 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [3] R5 Class3 Return Before Taxes        
Average Annual Return, Percent [3]   6.84%   4.90% 5.89%
Performance Inception Date [3] Apr. 10, 2017        
GLOBAL REAL ESTATE FUND, R6 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes        
Average Annual Return, Percent   7.01%   5.08% 6.06%
Performance Inception Date Jul. 26, 2013        
GLOBAL REAL ESTATE FUND G CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] G Class Return Before Taxes        
Average Annual Return, Percent   7.75% 2.76%    
Performance Inception Date Mar. 01, 2022        
REAL ESTATE FUND, INVESTOR CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Investor Class Return Before Taxes        
Average Annual Return, Percent   0.82%   5.08% 4.95%
Performance Inception Date Sep. 21, 1995        
REAL ESTATE 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   0.21%   3.46% 3.26%
Performance Inception Date Sep. 21, 1995        
REAL ESTATE 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   0.74%   3.66% 3.55%
Performance Inception Date Sep. 21, 1995        
REAL ESTATE FUND, I CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] I Class Return Before Taxes        
Average Annual Return, Percent   1.02%   5.30% 5.17%
Performance Inception Date Jun. 16, 1997        
REAL ESTATE FUND, Y CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [4] Y Class1 Return Before Taxes        
Average Annual Return, Percent [4]   1.17%   5.46% 5.32%
Performance Inception Date [4] Apr. 10, 2017        
REAL ESTATE FUND, A CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] A Class Return Before Taxes        
Average Annual Return, Percent   (5.22%)   3.59% 4.07%
Performance Inception Date Oct. 06, 1998        
REAL ESTATE FUND, C CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [5] C Class2 Return Before Taxes        
Average Annual Return, Percent [5]   (0.16%)   4.04% 4.07%
Performance Inception Date [5] Sep. 28, 2007        
REAL ESTATE FUND, R CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R Class Return Before Taxes        
Average Annual Return, Percent   0.32%   4.57% 4.43%
Performance Inception Date Sep. 28, 2007        
REAL ESTATE FUND, R5 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] [6] R5 Class3 Return Before Taxes        
Average Annual Return, Percent [6]   1.02%   5.30% 5.16%
Performance Inception Date [6] Apr. 10, 2017        
REAL ESTATE FUND, R6 CLASS          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] R6 Class Return Before Taxes        
Average Annual Return, Percent   1.17%   5.45% 5.32%
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. Since inception performance for the R5 Class is based on the I Class inception date.
[4] 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.
[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 is based on the performance of I Class shares, which have the same expenses as the R5 Class shares. Since inception performance for the R5 Class is based on the I Class inception date.