v3.26.1
Shareholder Report, Holdings (Details)
Mar. 31, 2026
C000241778 | BHP Group Ltd.  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000241778 | Anglo American PLC  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000241778 | Freeport-McMoRan, Inc.  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000241778 | Grupo Mexico SAB de CVSeries B  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000241778 | Newmont Corp.  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000241778 | Teck Resources Ltd.Class B  
Holdings [Line Items]  
Percent of Total Investments 5.50%
C000241778 | First Quantum Minerals Ltd.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000241778 | Lundin Mining Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000241778 | Southern Copper Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000241778 | Evolution Mining Ltd.  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000241778 | Diversified Metals & Mining  
Holdings [Line Items]  
Percent of Total Investments 46.80%
C000241778 | Copper  
Holdings [Line Items]  
Percent of Total Investments 36.00%
C000241778 | Gold  
Holdings [Line Items]  
Percent of Total Investments 13.80%
C000241778 | Steel  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000241778 | Precious Metals & Minerals  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000238488 | Westinghouse Air Brake Technologies Corp.  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000238488 | Veolia Environnement SA  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000238488 | Xylem, Inc.  
Holdings [Line Items]  
Percent of Total Investments 6.00%
C000238488 | Veralto Corp.  
Holdings [Line Items]  
Percent of Total Investments 5.90%
C000238488 | American Water Works Co., Inc.  
Holdings [Line Items]  
Percent of Total Investments 5.90%
C000238488 | Smurfit Westrock PLC  
Holdings [Line Items]  
Percent of Total Investments 5.80%
C000238488 | Clean Harbors, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000238488 | Cia de Saneamento Basico do Estado de Sao Paulo SABESP  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000238488 | Pentair PLC  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000238488 | United Utilities Group PLC  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000238488 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 54.60%
C000238488 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 31.60%
C000238488 | Materials  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000238488 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000012056 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000012056 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000012056 | Materials  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000012056 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 42.50%
C000012056 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000012056 | Financials  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000012056 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 9.80%
C000012056 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 8.50%
C000012056 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000012056 | Energy  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000012056 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000012056 | United States  
Holdings [Line Items]  
Percent of Total Investments 79.20%
C000012056 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000012056 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000012056 | Germany  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000012056 | France  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000012056 | Japan  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000012056 | Netherlands  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000012056 | South Korea  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000012056 | China  
Holdings [Line Items]  
Percent of Total Investments 1.10%
C000012056 | Spain  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000012056 | Australia  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000053784 | Other RowUtilities  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000053784 | Transportation Infrastructure  
Holdings [Line Items]  
Percent of Total Investments 39.60%
C000053784 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 27.70%
C000053784 | Oil, Gas & Consumable Fuels  
Holdings [Line Items]  
Percent of Total Investments 19.80%
C000053784 | Multi-Utilities  
Holdings [Line Items]  
Percent of Total Investments 9.40%
C000053784 | Independent Power and Renewable Electricity Producers  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000053784 | Water Utilities  
Holdings [Line Items]  
Percent of Total Investments 0.40%
C000053784 | Gas Utilities  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000053784 | United States  
Holdings [Line Items]  
Percent of Total Investments 37.20%
C000053784 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000053784 | Germany  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000053784 | France  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000053784 | China  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000053784 | Spain  
Holdings [Line Items]  
Percent of Total Investments 8.80%
C000053784 | Australia  
Holdings [Line Items]  
Percent of Total Investments 8.90%
C000053784 | Canada  
Holdings [Line Items]  
Percent of Total Investments 7.90%
C000053784 | Mexico  
Holdings [Line Items]  
Percent of Total Investments 7.50%
C000053784 | New Zealand  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000065076 | Other RowMaterials  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000065076 | Paper & Forest Products  
Holdings [Line Items]  
Percent of Total Investments 60.70%
C000065076 | Containers & Packaging  
Holdings [Line Items]  
Percent of Total Investments 23.20%
C000065076 | Specialized REITs  
Holdings [Line Items]  
Percent of Total Investments 12.30%
C000065076 | Household Durables  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000065076 | United States  
Holdings [Line Items]  
Percent of Total Investments 29.40%
C000065076 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000065076 | Japan  
Holdings [Line Items]  
Percent of Total Investments 9.90%
C000065076 | China  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000065076 | Canada  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000065076 | Brazil  
Holdings [Line Items]  
Percent of Total Investments 14.80%
C000065076 | Sweden  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000065076 | Finland  
Holdings [Line Items]  
Percent of Total Investments 9.10%
C000065076 | Thailand  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000065076 | Chile  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000241780 | Albemarle Corp.  
Holdings [Line Items]  
Percent of Total Investments 8.70%
C000241780 | PLS Group Ltd.  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000241780 | Sociedad Quimica y Minera de Chile SA  
Holdings [Line Items]  
Percent of Total Investments 8.50%
C000241780 | Liontown Ltd.  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000241780 | Mineral Resources Ltd.  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000241780 | Ganfeng Lithium Group Co. Ltd.Class A  
Holdings [Line Items]  
Percent of Total Investments 5.20%
C000241780 | Lithium Argentina AG  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000241780 | CosmoAM&T Co. Ltd.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000241780 | Lithium Americas Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000241780 | Sigma Lithium Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000241780 | Diversified Metals & Mining  
Holdings [Line Items]  
Percent of Total Investments 42.60%
C000241780 | Precious Metals & Minerals  
Holdings [Line Items]  
Percent of Total Investments 0.00% [1]
C000241780 | Specialty Chemicals  
Holdings [Line Items]  
Percent of Total Investments 31.20%
C000241780 | Commodity Chemicals  
Holdings [Line Items]  
Percent of Total Investments 12.00%
C000241780 | Electrical Components & Equipment  
Holdings [Line Items]  
Percent of Total Investments 8.70%
C000241780 | Technology Hardware, Storage & Peripherals  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000241780 | Automotive Parts & Equipment  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012103 | Other RowCommunication Services  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000012103 | Interactive Media & Services  
Holdings [Line Items]  
Percent of Total Investments 41.10%
C000012103 | Diversified Telecommunication Services  
Holdings [Line Items]  
Percent of Total Investments 26.00%
C000012103 | Entertainment  
Holdings [Line Items]  
Percent of Total Investments 18.70%
C000012103 | Wireless Telecommunication Services  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000012103 | Media  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000012103 | United States  
Holdings [Line Items]  
Percent of Total Investments 66.80%
C000012103 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000012103 | Germany  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000012103 | France  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012103 | Japan  
Holdings [Line Items]  
Percent of Total Investments 9.30%
C000012103 | Netherlands  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000012103 | China  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000012103 | Spain  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000012103 | Australia  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000012103 | Canada  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000024194 | Other RowConsumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000024194 | Household Durables  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000024194 | Broadline Retail  
Holdings [Line Items]  
Percent of Total Investments 23.90%
C000024194 | Hotels, Restaurants & Leisure  
Holdings [Line Items]  
Percent of Total Investments 20.80%
C000024194 | Automobiles  
Holdings [Line Items]  
Percent of Total Investments 19.50%
C000024194 | Specialty Retail  
Holdings [Line Items]  
Percent of Total Investments 18.00%
C000024194 | Textiles, Apparel & Luxury Goods  
Holdings [Line Items]  
Percent of Total Investments 8.80%
C000024194 | Automobile Components  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000024194 | Leisure Products  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000024194 | Distributors  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000024194 | Diversified Consumer Services  
Holdings [Line Items]  
Percent of Total Investments 0.10%
C000024194 | United States  
Holdings [Line Items]  
Percent of Total Investments 60.90%
C000024194 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000024194 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000024194 | Germany  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000024194 | France  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000024194 | Japan  
Holdings [Line Items]  
Percent of Total Investments 12.70%
C000024194 | China  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000024194 | Spain  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000024194 | Australia  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000024194 | Canada  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000024195 | Other RowConsumer Staples  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000024195 | Consumer Staples Distribution & Retail  
Holdings [Line Items]  
Percent of Total Investments 31.50%
C000024195 | Beverages  
Holdings [Line Items]  
Percent of Total Investments 18.90%
C000024195 | Food Products  
Holdings [Line Items]  
Percent of Total Investments 16.80%
C000024195 | Tobacco  
Holdings [Line Items]  
Percent of Total Investments 12.80%
C000024195 | Household Products  
Holdings [Line Items]  
Percent of Total Investments 11.80%
C000024195 | Personal Care Products  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000024195 | United States  
Holdings [Line Items]  
Percent of Total Investments 59.80%
C000024195 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 11.60%
C000024195 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000024195 | France  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000024195 | Japan  
Holdings [Line Items]  
Percent of Total Investments 6.00%
C000024195 | Netherlands  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000024195 | Australia  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000024195 | Canada  
Holdings [Line Items]  
Percent of Total Investments 2.70%
C000024195 | Mexico  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000024195 | Belgium  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000012089 | Other RowEnergy  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000012089 | Oil, Gas & Consumable Fuels  
Holdings [Line Items]  
Percent of Total Investments 95.20%
C000012089 | Energy Equipment & Services  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000012089 | United States  
Holdings [Line Items]  
Percent of Total Investments 60.00%
C000012089 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 10.50%
C000012089 | France  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000012089 | Japan  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000012089 | Spain  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000012089 | Australia  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000012089 | Canada  
Holdings [Line Items]  
Percent of Total Investments 13.60%
C000012089 | Brazil  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000012089 | Italy  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000012089 | Norway  
Holdings [Line Items]  
Percent of Total Investments 1.30%
C000012100 | Other RowFinancials  
Holdings [Line Items]  
Percent of Total Investments 12.10%
C000012100 | Banks  
Holdings [Line Items]  
Percent of Total Investments 45.40%
C000012100 | Capital Markets  
Holdings [Line Items]  
Percent of Total Investments 18.40%
C000012100 | Insurance  
Holdings [Line Items]  
Percent of Total Investments 17.70%
C000012100 | Financial Services  
Holdings [Line Items]  
Percent of Total Investments 16.30%
C000012100 | Consumer Finance  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000012100 | United States  
Holdings [Line Items]  
Percent of Total Investments 51.70%
C000012100 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 5.50%
C000012100 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 2.70%
C000012100 | Germany  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000012100 | Japan  
Holdings [Line Items]  
Percent of Total Investments 6.00%
C000012100 | China  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000012100 | Spain  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000012100 | Australia  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000012100 | Canada  
Holdings [Line Items]  
Percent of Total Investments 7.30%
C000012100 | Italy  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000012102 | Other RowHealth Care  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000012102 | Pharmaceuticals  
Holdings [Line Items]  
Percent of Total Investments 48.00%
C000012102 | Health Care Equipment & Supplies  
Holdings [Line Items]  
Percent of Total Investments 17.20%
C000012102 | Biotechnology  
Holdings [Line Items]  
Percent of Total Investments 15.30%
C000012102 | Health Care Providers & Services  
Holdings [Line Items]  
Percent of Total Investments 12.20%
C000012102 | Life Sciences Tools & Services  
Holdings [Line Items]  
Percent of Total Investments 7.20%
C000012102 | Health Care Technology  
Holdings [Line Items]  
Percent of Total Investments 0.10%
C000012102 | United States  
Holdings [Line Items]  
Percent of Total Investments 70.10%
C000012102 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000012102 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000012102 | Germany  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012102 | France  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000012102 | Japan  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000012102 | China  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000012102 | Australia  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000012102 | Belgium  
Holdings [Line Items]  
Percent of Total Investments 1.10%
C000012102 | Denmark  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000024196 | Other RowPassenger Airlines  
Holdings [Line Items]  
Percent of Total Investments 6.00%
C000024196 | Other RowIndustrials  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000024196 | Aerospace & Defense  
Holdings [Line Items]  
Percent of Total Investments 21.50%
C000024196 | Machinery  
Holdings [Line Items]  
Percent of Total Investments 18.60%
C000024196 | Electrical Equipment  
Holdings [Line Items]  
Percent of Total Investments 14.60%
C000024196 | Ground Transportation  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000024196 | Trading Companies & Distributors  
Holdings [Line Items]  
Percent of Total Investments 7.20%
C000024196 | Industrial Conglomerates  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000024196 | Professional Services  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000024196 | Building Products  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000024196 | Construction & Engineering  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000024196 | Commercial Services & Supplies  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000024196 | United States  
Holdings [Line Items]  
Percent of Total Investments 54.90%
C000024196 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000024196 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000024196 | Germany  
Holdings [Line Items]  
Percent of Total Investments 5.40%
C000024196 | France  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000024196 | Japan  
Holdings [Line Items]  
Percent of Total Investments 14.30%
C000024196 | South Korea  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000024196 | Canada  
Holdings [Line Items]  
Percent of Total Investments 2.30%
C000024196 | Sweden  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000024196 | Denmark  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000024198 | Other RowMaterials  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000024198 | Paper & Forest Products  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000024198 | Containers & Packaging  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000024198 | Metals & Mining  
Holdings [Line Items]  
Percent of Total Investments 47.90%
C000024198 | Chemicals  
Holdings [Line Items]  
Percent of Total Investments 39.00%
C000024198 | Construction Materials  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000024198 | United States  
Holdings [Line Items]  
Percent of Total Investments 39.70%
C000024198 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 8.90%
C000024198 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000024198 | Germany  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000024198 | France  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000024198 | Japan  
Holdings [Line Items]  
Percent of Total Investments 6.00%
C000024198 | Australia  
Holdings [Line Items]  
Percent of Total Investments 11.30%
C000024198 | Canada  
Holdings [Line Items]  
Percent of Total Investments 13.60%
C000024198 | Mexico  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000024198 | Brazil  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000012035 | Other RowInformation Technology  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000012035 | Technology Hardware, Storage & Peripherals  
Holdings [Line Items]  
Percent of Total Investments 19.40%
C000012035 | Semiconductors & Semiconductor Equipment  
Holdings [Line Items]  
Percent of Total Investments 45.60%
C000012035 | Software  
Holdings [Line Items]  
Percent of Total Investments 21.50%
C000012035 | Electronic Equipment, Instruments & Components  
Holdings [Line Items]  
Percent of Total Investments 5.20%
C000012035 | IT Services  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000012035 | Communications Equipment  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000012035 | United States  
Holdings [Line Items]  
Percent of Total Investments 76.50%
C000012035 | Germany  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000012035 | France  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000012035 | Japan  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000012035 | Netherlands  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000012035 | South Korea  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000012035 | China  
Holdings [Line Items]  
Percent of Total Investments 0.40%
C000012035 | Canada  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000012035 | Sweden  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000012035 | Taiwan  
Holdings [Line Items]  
Percent of Total Investments 6.50%
C000024197 | Other RowUtilities  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000024197 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 60.80%
C000024197 | Multi-Utilities  
Holdings [Line Items]  
Percent of Total Investments 27.00%
C000024197 | Independent Power and Renewable Electricity Producers  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000024197 | Water Utilities  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000024197 | Gas Utilities  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000024197 | United States  
Holdings [Line Items]  
Percent of Total Investments 62.20%
C000024197 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000024197 | Germany  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000024197 | France  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000024197 | Japan  
Holdings [Line Items]  
Percent of Total Investments 2.70%
C000024197 | Spain  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000024197 | Australia  
Holdings [Line Items]  
Percent of Total Investments 1.10%
C000024197 | Canada  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000024197 | Brazil  
Holdings [Line Items]  
Percent of Total Investments 1.10%
C000024197 | Italy  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000049095 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000049095 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 51.00%
C000049095 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000049095 | Financials  
Holdings [Line Items]  
Percent of Total Investments 21.10%
C000049095 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 1.10%
C000049095 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 11.50%
C000049095 | Energy  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000049095 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000049095 | South Korea  
Holdings [Line Items]  
Percent of Total Investments 25.10%
C000049095 | China  
Holdings [Line Items]  
Percent of Total Investments 31.20%
C000049095 | Taiwan  
Holdings [Line Items]  
Percent of Total Investments 32.90%
C000049095 | Hong Kong  
Holdings [Line Items]  
Percent of Total Investments 5.50%
C000049095 | Singapore  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000235105 | Circle Internet Group, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 11.80%
C000235105 | Coinbase Global, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 11.20%
C000235105 | IREN Ltd.  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000235105 | BitMine Immersion Technologies, Inc.  
Holdings [Line Items]  
Percent of Total Investments 6.70%
C000235105 | Applied Digital Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000235105 | Advanced Micro Devices, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000235105 | NVIDIA Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000235105 | Hut 8 Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000235105 | Mastercard, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000235105 | Tencent Holdings Ltd.  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000235105 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 68.90%
C000235105 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000235105 | Financials  
Holdings [Line Items]  
Percent of Total Investments 27.00%
C000235105 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 0.10%
C000065073 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 40.90%
C000065073 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 39.80%
C000065073 | Energy  
Holdings [Line Items]  
Percent of Total Investments 19.30%
C000065073 | South Korea  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000065073 | China  
Holdings [Line Items]  
Percent of Total Investments 32.50%
C000065073 | Mexico  
Holdings [Line Items]  
Percent of Total Investments 20.80%
C000065073 | Brazil  
Holdings [Line Items]  
Percent of Total Investments 23.90%
C000065073 | Thailand  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000065073 | United Arab Emirates  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000065073 | Qatar  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000065073 | Greece  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000012045 | Other RowIndustrials  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000012045 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 18.30%
C000012045 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 5.20%
C000012045 | Materials  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000012045 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000012045 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000012045 | Financials  
Holdings [Line Items]  
Percent of Total Investments 24.00%
C000012045 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 13.80%
C000012045 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000012045 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 8.70%
C000012045 | Energy  
Holdings [Line Items]  
Percent of Total Investments 5.90%
C000012045 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000012045 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 24.10%
C000012045 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 14.60%
C000012045 | Germany  
Holdings [Line Items]  
Percent of Total Investments 13.70%
C000012045 | France  
Holdings [Line Items]  
Percent of Total Investments 15.70%
C000012045 | Netherlands  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000012045 | Spain  
Holdings [Line Items]  
Percent of Total Investments 5.90%
C000012045 | Sweden  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000012045 | Belgium  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012045 | Italy  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000012045 | Denmark  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000201209 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000201209 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000201209 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 86.40%
C000201209 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000201209 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000201209 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000201209 | United States  
Holdings [Line Items]  
Percent of Total Investments 64.20%
C000201209 | France  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000201209 | Japan  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000201209 | South Korea  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000201209 | Australia  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000201209 | Canada  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000201209 | Taiwan  
Holdings [Line Items]  
Percent of Total Investments 16.00%
C000201209 | United Arab Emirates  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000201209 | Cayman Islands  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000201209 | Israel  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000240080 | Tencent Holdings Ltd.  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000240080 | Electronic Arts, Inc.  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000240080 | ROBLOX Corp.Class A  
Holdings [Line Items]  
Percent of Total Investments 5.70%
C000240080 | Krafton, Inc.  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000240080 | Take-Two Interactive Software, Inc.  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000240080 | Dassault Systemes SE  
Holdings [Line Items]  
Percent of Total Investments 5.20%
C000240080 | NetEase, Inc.  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000240080 | Unity Software, Inc.  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000240080 | Autodesk, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000240080 | Robinhood Markets, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000240080 | Household Durables  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000240080 | Interactive Media & Services  
Holdings [Line Items]  
Percent of Total Investments 11.10%
C000240080 | Entertainment  
Holdings [Line Items]  
Percent of Total Investments 33.10%
C000240080 | Broadline Retail  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000240080 | Hotels, Restaurants & Leisure  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000240080 | Leisure Products  
Holdings [Line Items]  
Percent of Total Investments 0.00% [2]
C000240080 | Capital Markets  
Holdings [Line Items]  
Percent of Total Investments 8.80%
C000240080 | Semiconductors & Semiconductor Equipment  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000240080 | Software  
Holdings [Line Items]  
Percent of Total Investments 30.70%
C000240080 | Electronic Equipment, Instruments & Components  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000064225 | HDFC Bank Ltd.  
Holdings [Line Items]  
Percent of Total Investments 11.00%
C000064225 | Reliance Industries Ltd.  
Holdings [Line Items]  
Percent of Total Investments 8.90%
C000064225 | ICICI Bank Ltd.  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000064225 | Bharti Airtel Ltd.  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000064225 | Infosys Ltd.  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000064225 | Larsen & Toubro Ltd.  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000064225 | State Bank of India  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000064225 | Axis Bank Ltd.  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000064225 | ITC Ltd.  
Holdings [Line Items]  
Percent of Total Investments 2.70%
C000064225 | Mahindra & Mahindra Ltd.  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000064225 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000064225 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000064225 | Materials  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000064225 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 9.50%
C000064225 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000064225 | Financials  
Holdings [Line Items]  
Percent of Total Investments 35.40%
C000064225 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000064225 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 10.50%
C000064225 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 5.90%
C000064225 | Energy  
Holdings [Line Items]  
Percent of Total Investments 11.00%
C000224636 | Other RowUtilities  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000224636 | Other RowReal Estate  
Holdings [Line Items]  
Percent of Total Investments 15.50%
C000224636 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 21.90%
C000224636 | Materials  
Holdings [Line Items]  
Percent of Total Investments 9.80%
C000224636 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000224636 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000224636 | Financials  
Holdings [Line Items]  
Percent of Total Investments 20.30%
C000224636 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000224636 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000224636 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000224636 | Energy  
Holdings [Line Items]  
Percent of Total Investments 7.30%
C000224636 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 11.40%
C000224636 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 15.40%
C000224636 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 7.20%
C000224636 | Germany  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000224636 | France  
Holdings [Line Items]  
Percent of Total Investments 5.50%
C000224636 | Japan  
Holdings [Line Items]  
Percent of Total Investments 29.20%
C000224636 | Australia  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000224636 | Canada  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000224636 | Sweden  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000224636 | Italy  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000224636 | Norway  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000168437 | Other RowIndustrials  
Holdings [Line Items]  
Percent of Total Investments 15.80%
C000168437 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 13.90%
C000168437 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 7.90%
C000168437 | Materials  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000168437 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000168437 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000168437 | Financials  
Holdings [Line Items]  
Percent of Total Investments 31.50%
C000168437 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 13.00%
C000168437 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000168437 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 10.40%
C000168437 | Energy  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000168437 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000168437 | United Kingdom  
Holdings [Line Items]  
Percent of Total Investments 7.20%
C000168437 | Switzerland  
Holdings [Line Items]  
Percent of Total Investments 12.70%
C000168437 | Germany  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000168437 | France  
Holdings [Line Items]  
Percent of Total Investments 10.90%
C000168437 | Japan  
Holdings [Line Items]  
Percent of Total Investments 20.50%
C000168437 | China  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000168437 | Australia  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000168437 | Canada  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000168437 | Italy  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000168437 | Taiwan  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000012078 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 6.70%
C000012078 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000012078 | Materials  
Holdings [Line Items]  
Percent of Total Investments 21.50%
C000012078 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000012078 | Financials  
Holdings [Line Items]  
Percent of Total Investments 37.20%
C000012078 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000012078 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000012078 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 9.40%
C000012078 | Energy  
Holdings [Line Items]  
Percent of Total Investments 13.00%
C000012078 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000012078 | Mexico  
Holdings [Line Items]  
Percent of Total Investments 25.40%
C000012078 | Brazil  
Holdings [Line Items]  
Percent of Total Investments 59.50%
C000012078 | Chile  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000012078 | Peru  
Holdings [Line Items]  
Percent of Total Investments 5.80%
C000012078 | Colombia  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000012067 | Mitsui & Co. Ltd.  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000012067 | Mitsubishi Corp.  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000012067 | Mizuho Financial Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000012067 | Advantest Corp.  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000012067 | Sumitomo Mitsui Financial Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000012067 | SoftBank Group Corp.  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000012067 | Tokyo Electron Ltd.  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000012067 | Mitsubishi Electric Corp.  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012067 | Shin-Etsu Chemical Co. Ltd.  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012067 | Mitsubishi UFJ Financial Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012067 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 28.20%
C000012067 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000012067 | Materials  
Holdings [Line Items]  
Percent of Total Investments 5.50%
C000012067 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 14.00%
C000012067 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000012067 | Financials  
Holdings [Line Items]  
Percent of Total Investments 14.10%
C000012067 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000012067 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000012067 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000012067 | Energy  
Holdings [Line Items]  
Percent of Total Investments 1.70%
C000012067 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000012077 | NVIDIA Corp.  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000012077 | Apple, Inc.  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000012077 | Microsoft Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000012077 | Amazon.com, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000012077 | Alphabet, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000012077 | Broadcom, Inc.  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000012077 | Alphabet, Inc.Class CNVS  
Holdings [Line Items]  
Percent of Total Investments 2.30%
C000012077 | Meta Platforms, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000012077 | Tesla, Inc.  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000012077 | Berkshire Hathaway, Inc.Class B  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000012077 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 9.90%
C000012077 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000012077 | Materials  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000012077 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 31.10%
C000012077 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000012077 | Financials  
Holdings [Line Items]  
Percent of Total Investments 12.90%
C000012077 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000012077 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000012077 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 5.20%
C000012077 | Energy  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000012077 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000012076 | NVIDIA Corp.  
Holdings [Line Items]  
Percent of Total Investments 12.90%
C000012076 | Apple, Inc.  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000012076 | Microsoft Corp.  
Holdings [Line Items]  
Percent of Total Investments 8.80%
C000012076 | Amazon.com, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000012076 | Alphabet, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000012076 | Broadcom, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000012076 | Alphabet, Inc.Class CNVS  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000012076 | Meta Platforms, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000012076 | Tesla, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000012076 | Eli Lilly & Co.  
Holdings [Line Items]  
Percent of Total Investments 2.70%
C000012076 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 6.70%
C000012076 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000012076 | Materials  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000012076 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 49.60%
C000012076 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 12.10%
C000012076 | Financials  
Holdings [Line Items]  
Percent of Total Investments 5.90%
C000012076 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000012076 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 13.20%
C000012076 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000012076 | Energy  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000012076 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 0.40%
C000012075 | Amazon.com, Inc.  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000012075 | Alphabet, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000012075 | Alphabet, Inc.Class CNVS  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012075 | Berkshire Hathaway, Inc.Class B  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000012075 | JPMorgan Chase & Co.  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000012075 | Exxon Mobil Corp.  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000012075 | Johnson & Johnson  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000012075 | Walmart, Inc.  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000012075 | Chevron Corp.  
Holdings [Line Items]  
Percent of Total Investments 1.30%
C000012075 | Micron Technology, Inc.  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000012075 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000012075 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000012075 | Materials  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000012075 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000012075 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 7.90%
C000012075 | Financials  
Holdings [Line Items]  
Percent of Total Investments 20.00%
C000012075 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000012075 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000012075 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 7.50%
C000012075 | Energy  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000012075 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000025777 | General Electric Co.  
Holdings [Line Items]  
Percent of Total Investments 19.00%
C000025777 | RTX Corp.  
Holdings [Line Items]  
Percent of Total Investments 16.60%
C000025777 | Boeing Co. (The)  
Holdings [Line Items]  
Percent of Total Investments 8.90%
C000025777 | General Dynamics Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000025777 | L3Harris Technologies, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000025777 | Lockheed Martin Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025777 | Northrop Grumman Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025777 | TransDigm Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025777 | Howmet Aerospace, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025777 | Axon Enterprise, Inc.  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000025777 | Leisure Products  
Holdings [Line Items]  
Percent of Total Investments 0.10%
C000025777 | Aerospace & Defense  
Holdings [Line Items]  
Percent of Total Investments 99.90%
C000025774 | Coinbase Global, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000025774 | Robinhood Markets, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000025774 | Goldman Sachs Group, Inc. (The)  
Holdings [Line Items]  
Percent of Total Investments 18.30%
C000025774 | Morgan Stanley  
Holdings [Line Items]  
Percent of Total Investments 14.30%
C000025774 | Charles Schwab Corp. (The)  
Holdings [Line Items]  
Percent of Total Investments 11.30%
C000025774 | Intercontinental Exchange, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025774 | S&P Global, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025774 | Moody's Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025774 | CME Group, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025774 | MSCI, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000025774 | Investment Banking & Brokerage  
Holdings [Line Items]  
Percent of Total Investments 63.40%
C000025774 | Financial Exchanges & Data  
Holdings [Line Items]  
Percent of Total Investments 36.60%
C000025772 | UnitedHealth Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 22.50%
C000025772 | CVS Health Corp.  
Holdings [Line Items]  
Percent of Total Investments 12.80%
C000025772 | HCA Healthcare, Inc.  
Holdings [Line Items]  
Percent of Total Investments 9.00%
C000025772 | Cigna Group (The)  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000025772 | Elevance Health, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000025772 | Veeva Systems, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025772 | Labcorp Holdings, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000025772 | Quest Diagnostics, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000025772 | Humana, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000025772 | Tenet Healthcare Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000025772 | Health Care Technology  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000025772 | Managed Health Care  
Holdings [Line Items]  
Percent of Total Investments 37.30%
C000025772 | Health Care Services  
Holdings [Line Items]  
Percent of Total Investments 36.00%
C000025772 | Health Care Facilities  
Holdings [Line Items]  
Percent of Total Investments 20.50%
C000025769 | DR Horton, Inc.  
Holdings [Line Items]  
Percent of Total Investments 15.00%
C000025769 | PulteGroup, Inc.  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000025769 | Lennar Corp.Class A  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000025769 | NVR, Inc.  
Holdings [Line Items]  
Percent of Total Investments 7.50%
C000025769 | Toll Brothers, Inc.  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000025769 | Sherwin-Williams Co. (The)  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000025769 | Lowe's Companies, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025769 | Home Depot, Inc. (The)  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025769 | TopBuild Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000025769 | Lennox International, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000025769 | Specialty Chemicals  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000025769 | Building Products  
Holdings [Line Items]  
Percent of Total Investments 16.80%
C000025769 | Construction Materials  
Holdings [Line Items]  
Percent of Total Investments 1.30%
C000025769 | Homebuilding  
Holdings [Line Items]  
Percent of Total Investments 65.10%
C000025769 | Home Improvement Retail  
Holdings [Line Items]  
Percent of Total Investments 10.20%
C000025769 | Home Furnishings  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000025769 | Homefurnishing Retail  
Holdings [Line Items]  
Percent of Total Investments 0.10%
C000198491 | Caterpillar, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000198491 | NextEra Energy, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000198491 | Union Pacific Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000198491 | Quanta Services, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000198491 | CSX Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000198491 | CRH PLC  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000198491 | Southern Co. (The)  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000198491 | Duke Energy Corp.  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000198491 | Norfolk Southern Corp.  
Holdings [Line Items]  
Percent of Total Investments 2.70%
C000198491 | Constellation Energy Corp.  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000198491 | Other RowDiversified Chemicals  
Holdings [Line Items]  
Percent of Total Investments 10.50%
C000198491 | Steel  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000198491 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 26.70%
C000198491 | Multi-Utilities  
Holdings [Line Items]  
Percent of Total Investments 10.50%
C000198491 | Trading Companies & Distributors  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000198491 | Building Products  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000198491 | Construction & Engineering  
Holdings [Line Items]  
Percent of Total Investments 12.60%
C000198491 | Construction Materials  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000198491 | Rail Transportation  
Holdings [Line Items]  
Percent of Total Investments 9.80%
C000198491 | Oil & Gas Storage & Transportation  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000198491 | Construction Machinery & Heavy Transportation Equipment  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000025775 | Chubb Ltd.  
Holdings [Line Items]  
Percent of Total Investments 13.70%
C000025775 | Progressive Corp. (The)  
Holdings [Line Items]  
Percent of Total Investments 13.40%
C000025775 | Travelers Companies, Inc. (The)  
Holdings [Line Items]  
Percent of Total Investments 7.30%
C000025775 | Allstate Corp. (The)  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000025775 | MetLife, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025775 | Aflac, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025775 | Hartford Insurance Group, Inc. (The)  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025775 | American International Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025775 | Arch Capital Group Ltd.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000025775 | Prudential Financial, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000025775 | Property & Casualty Insurance  
Holdings [Line Items]  
Percent of Total Investments 78.40%
C000025775 | Life & Health Insurance  
Holdings [Line Items]  
Percent of Total Investments 21.40%
C000025775 | Multi-line Insurance  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000251033 | RTX Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000251033 | Caterpillar, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000251033 | Eaton Corp. PLC  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000251033 | Deere & Co.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000251033 | Honeywell International, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000251033 | Amphenol Corp.Class A  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000251033 | Cummins, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000251033 | Vertiv Holdings Co.Class A  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000251033 | Parker-Hannifin Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000251033 | General Motors Co.  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000251033 | Other RowElectronic Equipment & Instruments  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000251033 | Electrical Components & Equipment  
Holdings [Line Items]  
Percent of Total Investments 17.30%
C000251033 | Aerospace & Defense  
Holdings [Line Items]  
Percent of Total Investments 14.00%
C000251033 | Industrial Conglomerates  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000251033 | Building Products  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000251033 | Construction Machinery & Heavy Transportation Equipment  
Holdings [Line Items]  
Percent of Total Investments 13.10%
C000251033 | Industrial Machinery & Supplies & Components  
Holdings [Line Items]  
Percent of Total Investments 12.70%
C000251033 | Electronic Components  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000251033 | Automobile Manufacturers  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000251033 | Electronic Manufacturing Services  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000251033 | Agricultural & Farm Machinery  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025773 | Abbott Laboratories  
Holdings [Line Items]  
Percent of Total Investments 17.00%
C000025773 | Intuitive Surgical, Inc.  
Holdings [Line Items]  
Percent of Total Investments 15.60%
C000025773 | Stryker Corp.  
Holdings [Line Items]  
Percent of Total Investments 10.80%
C000025773 | Medtronic PLC  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025773 | Becton Dickinson & Co.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025773 | Edwards Lifesciences Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025773 | IDEXX Laboratories, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025773 | ResMed, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025773 | GE HealthCare Technologies, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025773 | Boston Scientific Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000025773 | Health Care Equipment & Supplies  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025773 | Health Care Equipment  
Holdings [Line Items]  
Percent of Total Investments 95.60%
C000025768 | ConocoPhillips  
Holdings [Line Items]  
Percent of Total Investments 19.50%
C000025768 | EOG Resources, Inc.  
Holdings [Line Items]  
Percent of Total Investments 9.40%
C000025768 | Valero Energy Corp.  
Holdings [Line Items]  
Percent of Total Investments 9.10%
C000025768 | Phillips 66  
Holdings [Line Items]  
Percent of Total Investments 7.30%
C000025768 | Diamondback Energy, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000025768 | Devon Energy Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025768 | Marathon Petroleum Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025768 | EQT Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000025768 | Coterra Energy, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000025768 | Expand Energy Corp.  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000025768 | Oil & Gas Exploration & Production  
Holdings [Line Items]  
Percent of Total Investments 75.30%
C000025768 | Oil & Gas Refining & Marketing  
Holdings [Line Items]  
Percent of Total Investments 24.70%
C000025770 | SLB Ltd.  
Holdings [Line Items]  
Percent of Total Investments 23.00%
C000025770 | Baker Hughes Co.Class A  
Holdings [Line Items]  
Percent of Total Investments 22.30%
C000025770 | Halliburton Co.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000025770 | TechnipFMC PLC  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025770 | Weatherford International PLC  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000025770 | NOV, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000025770 | Transocean Ltd.  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000025770 | Valaris Ltd.  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000025770 | Noble Corp. PLC  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000025770 | Archrock, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000025770 | Oil & Gas Equipment & Services  
Holdings [Line Items]  
Percent of Total Investments 83.80%
C000025770 | Oil & Gas Drilling  
Holdings [Line Items]  
Percent of Total Investments 16.20%
C000025771 | Eli Lilly & Co.  
Holdings [Line Items]  
Percent of Total Investments 21.10%
C000025771 | Johnson & Johnson  
Holdings [Line Items]  
Percent of Total Investments 23.10%
C000025771 | Merck & Co., Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000025771 | Pfizer, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000025771 | Royalty Pharma PLCClass A  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000025771 | Bristol-Myers Squibb Co.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025771 | Zoetis, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025771 | Viatris, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025771 | Elanco Animal Health, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000025771 | Jazz Pharmaceuticals PLC  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000025771 | Pharmaceuticals  
Holdings [Line Items]  
Percent of Total Investments 100.00%
C000012058 | Welltower, Inc.  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000012058 | Prologis, Inc.  
Holdings [Line Items]  
Percent of Total Investments 9.20%
C000012058 | Equinix, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000012058 | Digital Realty Trust, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000012058 | Simon Property Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000012058 | Realty Income Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000012058 | American Tower Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000012058 | Public Storage  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000012058 | CBRE Group, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000012058 | Ventas, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000012058 | Other RowOffice REITs  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000012058 | Health Care REITs  
Holdings [Line Items]  
Percent of Total Investments 16.50%
C000012058 | Retail REITs  
Holdings [Line Items]  
Percent of Total Investments 14.00%
C000012058 | Industrial REITs  
Holdings [Line Items]  
Percent of Total Investments 12.20%
C000012058 | Data Center REITs  
Holdings [Line Items]  
Percent of Total Investments 9.30%
C000012058 | Telecom Tower REITs  
Holdings [Line Items]  
Percent of Total Investments 8.70%
C000012058 | Multi-Family Residential REITs  
Holdings [Line Items]  
Percent of Total Investments 7.50%
C000012058 | Other Specialized REITs  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000012058 | Real Estate Services  
Holdings [Line Items]  
Percent of Total Investments 6.40%
C000012058 | Self-Storage REITs  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000012058 | Single-Family Residential REITs  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000025776 | PNC Financial Services Group, Inc. (The)  
Holdings [Line Items]  
Percent of Total Investments 14.60%
C000025776 | U.S. Bancorp  
Holdings [Line Items]  
Percent of Total Investments 14.00%
C000025776 | Truist Financial Corp.  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000025776 | Fifth Third Bancorp  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000025776 | Citizens Financial Group, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000025776 | M&T Bank Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000025776 | Huntington Bancshares, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000025776 | Regions Financial Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000025776 | KeyCorp  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000025776 | First Citizens BancShares, Inc.Class A  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000025776 | Regional Banks  
Holdings [Line Items]  
Percent of Total Investments 58.30%
C000025776 | Diversified Banks  
Holdings [Line Items]  
Percent of Total Investments 41.70%
C000012063 | Cisco Systems, Inc.  
Holdings [Line Items]  
Percent of Total Investments 19.20%
C000012063 | Verizon Communications, Inc.  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000012063 | AT&T, Inc.  
Holdings [Line Items]  
Percent of Total Investments 12.90%
C000012063 | Ciena Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000012063 | T-Mobile U.S., Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.10%
C000012063 | Arista Networks, Inc.  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000012063 | Comcast Corp.Class A  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000012063 | Lumentum Holdings, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000012063 | Iridium Communications, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000012063 | Motorola Solutions, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000012063 | Wireless Telecommunication Services  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000012063 | Communications Equipment  
Holdings [Line Items]  
Percent of Total Investments 38.50%
C000012063 | Integrated Telecommunication Services  
Holdings [Line Items]  
Percent of Total Investments 33.60%
C000012063 | Alternative Carriers  
Holdings [Line Items]  
Percent of Total Investments 10.40%
C000012063 | Cable & Satellite  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000012063 | Movies & Entertainment  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000261357 | Tesla, Inc.  
Holdings [Line Items]  
Percent of Total Investments 9.00%
C000261357 | Exxon Mobil Corp.  
Holdings [Line Items]  
Percent of Total Investments 11.10%
C000261357 | Chevron Corp.  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000261357 | Charles Schwab Corp. (The)  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000261357 | Caterpillar, Inc.  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000261357 | ConocoPhillips  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000261357 | AT&T, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.80%
C000261357 | Oracle Corp.  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000261357 | Texas Instruments, Inc.  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000261357 | McKesson Corp.  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000261357 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 15.00%
C000261357 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000261357 | Materials  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000261357 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 13.00%
C000261357 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000261357 | Financials  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000261357 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000261357 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 10.90%
C000261357 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000261357 | Energy  
Holdings [Line Items]  
Percent of Total Investments 39.20%
C000261357 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000222498 | Ultra Clean Holdings, Inc.  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000222498 | Tactile Systems Technology, Inc.  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000222498 | Peabody Energy Corp.  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000222498 | Nordic American Tankers Ltd.  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000222498 | TETRA Technologies, Inc.  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000222498 | Par Pacific Holdings, Inc.  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000222498 | LSB Industries, Inc.  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000222498 | Enhabit, Inc.  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000222498 | Protagonist Therapeutics, Inc.  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000222498 | Photronics, Inc.  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000222498 | Industrials  
Holdings [Line Items]  
Percent of Total Investments 16.60%
C000222498 | Utilities  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000222498 | Materials  
Holdings [Line Items]  
Percent of Total Investments 6.40%
C000222498 | Information Technology  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000222498 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000222498 | Financials  
Holdings [Line Items]  
Percent of Total Investments 23.40%
C000222498 | Health Care  
Holdings [Line Items]  
Percent of Total Investments 10.30%
C000222498 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 12.70%
C000222498 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000222498 | Energy  
Holdings [Line Items]  
Percent of Total Investments 9.60%
C000222498 | Real Estate  
Holdings [Line Items]  
Percent of Total Investments 2.80%
[1] Rounds to less than 0.1%.
[2] Rounds to less than 0.1%.