v3.25.4
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 15 Months Ended 60 Months Ended 74 Months Ended 118 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
C000101136 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 12.48%   4.02%     6.00%
C000201968 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 6.28%   2.60%     5.13%
C000101134 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 12.10%   3.71%     5.69%
C000101135 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 12.41%   3.97%     5.96%
C000101144 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 14.12%   5.83%     7.89%
C000101143 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 13.91%   5.58%     7.64%
C000201971 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 7.88%   4.44%     7.05%
C000101145 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 14.19%   5.89%     7.95%
C000101148 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 16.09%   7.23%     9.01%
C000201972 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 9.62%   5.76%     8.10%
C000101146 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 15.70%   6.91%     8.68%
C000101147 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 16.02%   7.19%     8.95%
C000101150 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 17.60%   8.42%     9.89%
C000101149 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 17.27%   8.14%     9.62%
C000201973 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 11.17%   7.00%     9.03%
C000101151 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 17.66%   8.48%     9.95%
C000101154 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 19.10%   9.61%     10.75%
C000201974 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 12.51%   8.10%     9.83%
C000101152 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 18.76%   9.27%     10.42%
C000101153 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 19.02%   9.54%     10.69%
C000101156 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 20.71%   10.40%     11.21%
C000101155 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 20.38%   10.12%     10.94%
C000201975 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 14.11%   8.94%     10.34%
C000101157 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 20.72%   10.44%     11.27%
C000101160 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 21.59%   10.79%     11.45%
C000201976 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 14.91%   9.28%     10.52%
C000101158 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 21.25%   10.46%     11.12%
C000101159 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 21.58%   10.74%     11.40%
C000166218 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 21.66%   10.76%   12.34%  
C000166217 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 21.37%   10.49%   12.05%  
C000201977 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 14.98%   9.31%   11.46%  
C000166219 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 21.71%   10.81%   12.39%  
C000213835 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 21.72%   10.83% 12.26%    
C000213838 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 14.96%   9.32% 10.96%    
C000213836 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 21.36%   10.50% 11.93%    
C000213837 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 21.68%   10.77% 12.20%    
C000251822 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Institutional Shares          
Average Annual Return, Percent 22.43% 21.48%        
C000251821 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor A Shares          
Average Annual Return, Percent 22.04% 21.02%        
C000251823 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares (with sales charge)          
Average Annual Return, Percent 15.71% 14.74%        
C000251820 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Class K Shares          
Average Annual Return, Percent 22.48% 21.55%        
Without Sales Load [Member] | C000201968 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 12.17%   3.72%     5.70%
Without Sales Load [Member] | C000201971 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 13.86%   5.57%     7.63%
Without Sales Load [Member] | C000201972 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 15.69%   6.91%     8.68%
Without Sales Load [Member] | C000201973 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 17.33%   8.16%     9.62%
Without Sales Load [Member] | C000201974 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 18.74%   9.27%     10.42%
Without Sales Load [Member] | C000201975 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 20.43%   10.12%     10.94%
Without Sales Load [Member] | C000201976 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 21.27%   10.47%     11.12%
Without Sales Load [Member] | C000201977 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 21.35%   10.49%   12.06%  
Without Sales Load [Member] | C000213838 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 21.33%   10.50% 11.92%    
Without Sales Load [Member] | C000251823 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Investor P Shares          
Average Annual Return, Percent 22.07% 21.05%        
Bloomberg U S Aggregate Bond C000101136 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg U.S. Aggregate Bond Index          
Average Annual Return, Percent 7.30%   (0.36%)     2.01%
Bloomberg U S Aggregate Bond C000201968 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg U.S. Aggregate Bond Index          
Average Annual Return, Percent 7.30%   (0.36%)     2.01%
Bloomberg U S Aggregate Bond C000101134 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg U.S. Aggregate Bond Index          
Average Annual Return, Percent 7.30%   (0.36%)     2.01%
Bloomberg U S Aggregate Bond C000101135 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg U.S. Aggregate Bond Index          
Average Annual Return, Percent 7.30%   (0.36%)     2.01%
Russell 1000 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Russell 1000® Index          
Average Annual Return, Percent 17.37% 16.36% 13.59% 15.52% 15.50% 14.59%
Russell 1000 C000101136 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Russell 1000® Index          
Average Annual Return, Percent 17.37%   13.59%     14.59%
Russell 1000 C000201968 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Russell 1000® Index          
Average Annual Return, Percent 17.37%   13.59%     14.59%
Russell 1000 C000101135 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Russell 1000® Index          
Average Annual Return, Percent 17.37%   13.59%     14.59%
LifePath Index Retirement Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index Retirement Fund Custom Benchmark          
Average Annual Return, Percent 12.55%   4.11%     6.08%
Russell 1000 C000101134 Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Russell 1000® Index          
Average Annual Return, Percent 17.37%   13.59%     14.59%
LifePath Index 2030 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2030 Fund Custom Benchmark          
Average Annual Return, Percent 14.29%   5.95%     7.99%
Bloomberg U S Aggregate Bond Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg U.S. Aggregate Bond Index          
Average Annual Return, Percent 7.30% 2.89% (0.36%) 0.95% 1.83% 2.01%
LifePath Index 2035 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2035 Fund Custom Benchmark          
Average Annual Return, Percent 16.08%   7.26%     9.03%
LifePath Index 2040 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2040 Fund Custom Benchmark          
Average Annual Return, Percent 17.68%   8.48%     9.96%
LifePath Index 2045 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2045 Fund Custom Benchmark          
Average Annual Return, Percent 19.15%   9.58%     10.74%
LifePath Index 2050 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2050 Fund Custom Benchmark          
Average Annual Return, Percent 20.74%   10.41%     11.25%
LifePath Index 2055 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2055 Fund Custom Benchmark          
Average Annual Return, Percent 21.59%   10.76%     11.44%
LifePath Index 2060 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2060 Fund Custom Benchmark          
Average Annual Return, Percent 21.74%   10.80%   12.36%  
LifePath Index 2065 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2065 Fund Custom Benchmark          
Average Annual Return, Percent 21.74%   10.79% 12.19%    
LifePath Index 2070 Fund Custom Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name LifePath Index 2070 Fund Custom Benchmark          
Average Annual Return, Percent 21.74% 16.39%