v3.26.1
Shareholder Report, Average Annual Return (Details)
 2 Months Ended 12 Months Ended 20 Months Ended 33 Months Ended 38 Months Ended 41 Months Ended 47 Months Ended 60 Months Ended 65 Months Ended 93 Months Ended 96 Months Ended 118 Months Ended 120 Months Ended
May 16, 2016
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
C000012056                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000053784                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000065076                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012103                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000024194                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000024195                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012089                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012100                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012102                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000024196                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000024198                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012035                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000024197                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000049095                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000065073                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012045                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000201209                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000064225                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012078                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012067                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012077                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012076                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012075                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025777                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025774                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025772                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025769                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000198491                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025775                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000251033                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025773                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025768                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025770                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025771                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012058                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000025776                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000012063                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
C000222498                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Fund                        
Without Sales Load [Member] | C000241778                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   87.41%   28.73%                    
Without Sales Load [Member] | C000238488                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   17.73%       12.69%                
Without Sales Load [Member] | C000012056                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   26.77%           14.53%           14.98%
Without Sales Load [Member] | C000053784                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   26.52%           11.48%           8.70%
Without Sales Load [Member] | C000065076                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   (3.49%)           (1.69%)           6.15%
Without Sales Load [Member] | C000241780                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   118.49%   (9.36%)                    
Without Sales Load [Member] | C000012103                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   22.11%           9.38%           8.82%
Without Sales Load [Member] | C000024194                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   6.63%           3.97%           9.09%
Without Sales Load [Member] | C000024195                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   6.99%           5.37%           5.73%
Without Sales Load [Member] | C000012089                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   42.32%           23.44%           11.40%
Without Sales Load [Member] | C000012100                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   13.16%           12.17%           11.60%
Without Sales Load [Member] | C000012102                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   4.38%           5.41%           8.47%
Without Sales Load [Member] | C000024196                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   26.43%           11.11%           11.74%
Without Sales Load [Member] | C000024198                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   32.82%           7.63%           11.36%
Without Sales Load [Member] | C000012035                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   33.26%           15.14%           20.61%
Without Sales Load [Member] | C000024197                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   28.29%           10.64%           9.54%
Without Sales Load [Member] | C000049095                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   50.02%           5.55%           11.67%
Without Sales Load [Member] | C000235105                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   57.26%         12.47%              
Without Sales Load [Member] | C000065073                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   38.85%           6.29%           2.58%
Without Sales Load [Member] | C000012045                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   20.37%           9.33%           8.65%
Without Sales Load [Member] | C000201209                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   47.47%           2.49%     9.86%      
Without Sales Load [Member] | C000240080                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   (5.02%)     8.51%                  
Without Sales Load [Member] | C000064225                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   (11.73%)           2.43%           6.70%
Without Sales Load [Member] | C000224636                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   33.69%           10.59% 10.44%          
Without Sales Load [Member] | C000168437                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   18.79%           8.09%         8.49%  
Without Sales Load [Member] | C000012078                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   57.36%           12.98%           8.55%
Without Sales Load [Member] | C000012067                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   29.18%           7.07%           8.44%
Without Sales Load [Member] | C000012077                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   17.58%           11.18%           13.81%
Without Sales Load [Member] | C000012076                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   18.60%           12.57%           16.62%
Without Sales Load [Member] | C000012075                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   15.68%           9.24%           10.39%
Without Sales Load [Member] | C000025777                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   43.53%           16.95%           15.27%
Without Sales Load [Member] | C000025774                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   18.53%           14.10%           17.83%
Without Sales Load [Member] | C000025772                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   (19.80%)           (2.78%)           6.62%
Without Sales Load [Member] | C000025769                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   (3.64%)           6.84%           13.59%
Without Sales Load [Member] | C000198491                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   29.13%           12.78%       13.07%    
Without Sales Load [Member] | C000025775                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   (4.43%)           13.79%           12.15%
Without Sales Load [Member] | C000251033                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   44.89% 20.89%                      
Without Sales Load [Member] | C000025773                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   (11.04%)           (0.19%)           10.52%
Without Sales Load [Member] | C000025768                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   35.37%           24.42%           11.88%
Without Sales Load [Member] | C000025770                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   51.10%           18.09%           (0.35%)
Without Sales Load [Member] | C000025771                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   25.17%           9.84%           8.24%
Without Sales Load [Member] | C000012058                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   1.10%           3.20%           5.03%
Without Sales Load [Member] | C000025776                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   19.22%           2.16%           8.38%
Without Sales Load [Member] | C000012063                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   46.49%           6.33%           5.05%
Without Sales Load [Member] | C000222498                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   23.11%           5.70%   14.37%        
STOXX Emerging Markets All Cap Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   STOXX Emerging Markets All Cap Index (Net)                        
Average Annual Return, Percent   28.08%   14.42%                    
FTSE All-World Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   FTSE All-World Index (Net)                        
Average Annual Return, Percent   20.04%       17.96%                
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
STOXX Emerging Markets All Cap Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   STOXX Emerging Markets All Cap Index (Net)                        
Average Annual Return, Percent   28.08%   14.42%                    
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Global Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Broad Market Index (Net)                        
Average Annual Return, Percent   20.55%           8.78%           10.94%
S&P Developed ex US Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Developed ex US Broad Market Index (Net)                        
Average Annual Return, Percent   27.35%           7.75%           8.62%
MSCI All Country World Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   MSCI All Country World Index (Net)                        
Average Annual Return, Percent   20.01%         11.96%              
S&P Emerging Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Emerging Broad Market Index (Net)                        
Average Annual Return, Percent   19.37%           3.62%           7.66%
S&P Developed ex US Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Developed ex US Broad Market Index (Net)                        
Average Annual Return, Percent   27.35%           7.75%           8.62%
MSCI All Country World Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   MSCI All Country World Index (Net)                        
Average Annual Return, Percent   20.01%           9.49%     10.73%      
MSCI All Country World Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   MSCI All Country World Index (Net)                        
Average Annual Return, Percent   20.01%     15.63%                  
MSCI Emerging Markets Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   MSCI Emerging Markets Index (Net)                        
Average Annual Return, Percent   29.55%           3.69%           7.80%
FTSE All World ex-US Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   FTSE All World ex-US Index (Net)                        
Average Annual Return, Percent   24.96%           7.11% 7.05%          
MSCI All Country World ex-USA Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   MSCI ACWI ex-USA Index (Net)                        
Average Annual Return, Percent   24.91%           7.02%         8.54%  
S&P Emerging Broad Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Emerging Broad Market Index (Net)                        
Average Annual Return, Percent   19.37%           3.62%           7.66%
MSCI All Country World ex-USA Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   MSCI ACWI ex-USA Index (Net)                        
Average Annual Return, Percent   24.91%           7.02%           8.38%
Russell 3000 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 3000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                        
Average Annual Return, Percent   18.09%           10.87%           13.72%
Russell 3000 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 3000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                        
Average Annual Return, Percent   18.09%           10.87%           13.72%
Russell 3000 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 3000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                        
Average Annual Return, Percent   18.09%           10.87%           13.72%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
MSCI USA Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   MSCI USA Index                        
Average Annual Return, Percent   17.74%           11.62%       13.93%    
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14% 10.86%                      
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
S&P Total Market Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Total Market Index                        
Average Annual Return, Percent   18.14%           10.76%           13.65%
Russell 3000 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 3000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                        
Average Annual Return, Percent   18.09%           10.87%           13.72%
Russell 3000 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 3000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                        
Russell 3000 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 3000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                        
Average Annual Return, Percent   18.09%           10.87%   13.76%        
STOXX Global Copper and Metals Mining Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   STOXX Global Copper and Metals Mining Index (Net)                        
Average Annual Return, Percent   86.29%   28.76%                    
FTSE Green Revenues Select Infrastructure and Industrials Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   FTSE Green Revenues Select Infrastructure and Industrials Index (Net)                        
Average Annual Return, Percent   17.38%       12.71%                
FTSE All World ex-US Index                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   24.96%       17.96%                
S&P Global 100                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 100™ (Net)                        
Average Annual Return, Percent   26.54%           14.46%           14.88%
S&P Global Infrastructure Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Infrastructure Index™ (Net)                        
Average Annual Return, Percent   25.85%           11.14%           8.43%
S&P Global Timber & Forestry Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global Timber & Forestry Index™ (Net)                        
Average Annual Return, Percent   (4.47%)           (2.10%)           5.84%
STOXX Global Lithium Miners and Producers Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   STOXX Global Lithium Miners and Producers Index (Net)                        
Average Annual Return, Percent   115.09%   (10.80%)                    
S&P Glbl 1200 Comm Services 4.5/22.5/45 Cpd Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Communication Services 4.5/22.5/45 Capped Index™ (Spliced)                        
Average Annual Return, Percent   21.18%           9.29%           8.80%
S&P Glbl 1200 Cnsmr Dscrtnry (Sctr) Cpd Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Consumer Discretionary (Sector) Capped Index™ (Spliced)                        
Average Annual Return, Percent   5.94%           3.90%           9.11%
S&P Global 1200 Consumer Staples (Sctor) Cpd Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Consumer Staples (Sector) Capped Index™ (Spliced)                        
Average Annual Return, Percent   6.56%           5.17%           5.58%
S&P Global 1200 Energy 4.5/22.5/45 Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Energy 4.5/22.5/45 Capped Index™ (Spliced)                        
Average Annual Return, Percent   42.14%           22.99%           11.00%
S&P Global 1200 Financials (Sector) Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Financials (Sector) Capped Index™ (Spliced)                        
Average Annual Return, Percent   12.48%           11.94%           11.52%
S&P Global 1200 Health Care (Sector) Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Health Care (Sector) Capped Index™ (Spliced)                        
Average Annual Return, Percent   3.86%           5.23%           8.41%
S&P Global 1200 Industrials (Sector) Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Industrials (Sector) Capped Index™ (Spliced)                        
Average Annual Return, Percent   25.42%           10.90%           11.65%
S&P Global 1200 Materials (Sector) Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Materials (Sector) Capped Index™ (Spliced)                        
Average Annual Return, Percent   31.91%           7.40%           11.31%
S&P Glbl 1200 Info Tchnlgy 4.5/22.5/45 Cpd Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Information Technology 4.5/22.5/45 Capped Index™ (Spliced)                        
Average Annual Return, Percent   32.55%           15.12%           20.68%
S&P Global 1200 Utilities (Sector) Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Global 1200 Utilities (Sector) Capped Index™ (Spliced)                        
Average Annual Return, Percent   27.37%           10.02%           9.06%
S&P Asia 50 Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Asia 50 Capped Index (Spliced)                        
Average Annual Return, Percent   46.32%           5.27%           11.87%
NYSE Factset Global Blockchain Technologies Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   NYSE<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> FactSet<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Global Blockchain Technologies Index (Net)                        
Average Annual Return, Percent   57.48%         12.17%              
S&P Emerging Markets Infrastructure Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Emerging Markets Plus Infrastructure Index™ (Net)                        
Average Annual Return, Percent   39.28%           6.38%           2.62%
S&P Europe 350                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Europe 350™ (Net)                        
Average Annual Return, Percent   19.39%           9.08%           8.70%
Morningstar Global Artificial Intelligence Select Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Morningstar<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Global Artificial Intelligence Select Index℠ (Spliced)                        
Average Annual Return, Percent   46.41%           2.40%     9.92%      
Mrngstar Glbl Metavrs & Vrtul Intrctn Selct Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Morningstar<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Global Metaverse & Virtual Interaction Select℠ (Net)                        
Average Annual Return, Percent   (5.51%)     8.55%                  
Nifty 50 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Nifty 50 Index™                        
Average Annual Return, Percent   (13.48%)           4.43%           8.59%
FTSE Developed ex US ex Korea Small Cap Focused Value Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   FTSE Developed ex US ex Korea Small Cap Focused Value Index (Net)                        
Average Annual Return, Percent   31.94%           10.29% 10.14%          
FTSE All-World Index                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   20.04%           9.47% 9.59%          
Morningstar Global ex-US Dividend Growth Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name Morningstar<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Global ex-US Dividend Growth Index℠ (Net)                          
Average Annual Return, Percent   17.17%           7.65%         8.26%  
MSCI All Country World Index                            
Average Annual Return [Line Items]                            
Average Annual Return, Percent   20.01%           9.49%         11.54%  
S&P Latin America 40                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P Latin America 40™ (Net)                        
Average Annual Return, Percent   57.68%           13.52%           8.95%
JPX-Nikkei Index 400                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   JPX-Nikkei Index 400 (Spliced)                        
Average Annual Return, Percent   26.37%           6.77%           8.45%
Russell 1000 Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 1000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                        
Average Annual Return, Percent   17.74%           11.34%           13.97%
Russell 1000 Growth                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 1000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Growth Index                        
Average Annual Return, Percent   18.81%           12.76%           16.83%
Russell 1000 Value                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 1000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Value Index                        
Average Annual Return, Percent   15.87%           9.43%           10.58%
Dow Jones U.S. Select Aerospace & Defense Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Aerospace & Defense Index™                        
Average Annual Return, Percent   44.09%           17.40%           15.74%
Dow Jones U.S. Select Investment Services Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Investment Services Index™                        
Average Annual Return, Percent   19.01%           14.54%           18.27%
Dow Jones U.S. Select Health Care Providers Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Health Care Providers Index™                        
Average Annual Return, Percent   (19.51%)           (2.44%)           7.02%
Dow Jones U.S. Select Home Construction Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Home Construction Index™                        
Average Annual Return, Percent   (3.34%)           7.30%           14.07%
NYSE FactSet U.S. Infrastructure Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   NYSE<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> FactSet U.S. Infrastructure Index                        
Average Annual Return, Percent   29.53%           13.06%       13.42%    
Dow Jones U.S. Select Insurance Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Insurance Index™                        
Average Annual Return, Percent   (4.11%)           14.22%           12.59%
S&P U.S. Manufacturing Select Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   S&P U.S. Manufacturing Select Index                        
Average Annual Return, Percent   45.52% 21.39%                      
Dow Jones U.S. Select Medical Equipment Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Medical Equipment Index™                        
Average Annual Return, Percent   (10.72%)           0.18%           10.96%
Dow Jones U.S. Select Oil Exploration & Production Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Oil Exploration & Production Index™                        
Average Annual Return, Percent   35.88%           24.91%           12.34%
Dow Jones U.S. Select Oil Equipment & Services Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Oil Equipment & Services Index™                        
Average Annual Return, Percent   51.67%           18.52%           0.00%
Dow Jones U.S. Select Pharmaceuticals Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Pharmaceuticals Index™                        
Average Annual Return, Percent   25.41%           10.11%           8.53%
Dow Jones U.S. Real Estate Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Real Estate Capped Index™ (Spliced)                        
Average Annual Return, Percent   1.48%           3.59%           5.41%
Dow Jones U.S. Select Regional Banks Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Dow Jones U.S. Select Regional Banks Index™                        
Average Annual Return, Percent   19.58%           2.52%           8.80%
Russell 1000 Telecommunications RIC 22.5/45 Capped Index (Spliced)                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 1000 Telecommunications RIC 22.5/45 Capped Index (Spliced)                        
Average Annual Return, Percent   47.30%           6.72%           5.31%
Russell Texas Equity Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell Texas Equity Index                        
Russell 2000 Focused Value Select Index                            
Average Annual Return [Line Items]                            
Line Graph and Table Measure Name   Russell 2000 Focused Value Select Index                        
Average Annual Return, Percent   23.39%           5.99%   14.73%