Shareholder Report, Holdings (Details)
|
Apr. 30, 2026 |
| C000012098 | NVIDIA Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.10%
|
| C000012098 | Apple, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.40%
|
| C000012098 | Broadcom, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.30%
|
| C000012098 | Amazon.com, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.70%
|
| C000012098 | Alphabet, Inc., A, , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.00%
|
| C000012098 | Microsoft Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.50%
|
| C000012098 | Meta Platforms, Inc., A, , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000012098 | Alphabet, Inc., C, , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.30%
|
| C000012098 | Eli Lilly & Co., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.40%
|
| C000012098 | Tesla, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.90%
|
| C000012098 | Information Technology |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
49.40%
|
| C000012098 | Communication Services |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.20%
|
| C000012098 | Consumer Discretionary |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.50%
|
| C000012098 | Industrials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.90%
|
| C000012098 | Financials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.10%
|
| C000012098 | Health Care |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.30%
|
| C000012098 | Consumer Staples |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.70%
|
| C000012098 | Real Estate |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000012098 | Materials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000012098 | Utilities |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000012098 | Energy |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012101 | Sandisk Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000012101 | Seagate Technology Holdings plc, , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000012101 | Western Digital Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000012101 | Marvell Technology, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000012101 | Corning, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000012101 | Vertiv Holdings Co., A, , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.90%
|
| C000012101 | Newmont Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.80%
|
| C000012101 | Quanta Services, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000012101 | Howmet Aerospace, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000012101 | Williams Cos., Inc. (The), , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012101 | Information Technology |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
17.40%
|
| C000012101 | Communication Services |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.60%
|
| C000012101 | Consumer Discretionary |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.80%
|
| C000012101 | Industrials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
19.90%
|
| C000012101 | Financials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.30%
|
| C000012101 | Health Care |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.10%
|
| C000012101 | Consumer Staples |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.40%
|
| C000012101 | Real Estate |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000012101 | Materials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.00%
|
| C000012101 | Utilities |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.50%
|
| C000012101 | Energy |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000012193 | Sandisk Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000012193 | Seagate Technology Holdings plc, , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000012193 | Western Digital Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000012193 | Marvell Technology, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000012193 | Corning, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.80%
|
| C000012193 | Vertiv Holdings Co., A, , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.80%
|
| C000012193 | Quanta Services, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.50%
|
| C000012193 | Howmet Aerospace, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.40%
|
| C000012193 | Johnson Controls International plc, , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.30%
|
| C000012193 | Ciena Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000012193 | Information Technology |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
28.40%
|
| C000012193 | Communication Services |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.70%
|
| C000012193 | Consumer Discretionary |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.50%
|
| C000012193 | Industrials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
27.70%
|
| C000012193 | Financials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.70%
|
| C000012193 | Health Care |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.40%
|
| C000012193 | Consumer Staples |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.60%
|
| C000012193 | Real Estate |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.50%
|
| C000012193 | Materials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.70%
|
| C000012193 | Utilities |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.70%
|
| C000012193 | Energy |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000012197 | Lumentum Holdings, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.10%
|
| C000012197 | ATI, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000012197 | ITT, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012197 | RBC Bearings, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012197 | Revolution Medicines, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012197 | MACOM Technology Solutions Holdings, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012197 | API Group Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012197 | Lattice Semiconductor Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012197 | Clean Harbors, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012197 | Sterling Infrastructure, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012197 | Information Technology |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.70%
|
| C000012197 | Communication Services |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.90%
|
| C000012197 | Consumer Discretionary |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.60%
|
| C000012197 | Industrials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
26.70%
|
| C000012197 | Financials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.10%
|
| C000012197 | Health Care |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.30%
|
| C000012197 | Consumer Staples |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.20%
|
| C000012197 | Real Estate |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.00%
|
| C000012197 | Materials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000012197 | Utilities |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.00%
|
| C000012197 | Energy |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.60%
|
| C000012198 | CF Industries Holdings, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012198 | Ovintiv, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012198 | TD SYNNEX Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012198 | Viatris, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000012198 | Alcoa Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012198 | Annaly Capital Management, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012198 | Moderna, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012198 | Everest Group Ltd., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012198 | Host Hotels & Resorts, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012198 | APA Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000012198 | Information Technology |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.30%
|
| C000012198 | Communication Services |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
2.30%
|
| C000012198 | Consumer Discretionary |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.80%
|
| C000012198 | Industrials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
13.10%
|
| C000012198 | Financials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
23.60%
|
| C000012198 | Health Care |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.90%
|
| C000012198 | Consumer Staples |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000012198 | Real Estate |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.10%
|
| C000012198 | Materials |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.10%
|
| C000012198 | Utilities |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000012198 | Energy |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.00%
|
| C000012079 | Equinix, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.30%
|
| C000012079 | Welltower, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.20%
|
| C000012079 | Prologis, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.70%
|
| C000012079 | American Tower Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
7.50%
|
| C000012079 | Simon Property Group, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
5.80%
|
| C000012079 | Digital Realty Trust, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.90%
|
| C000012079 | Public Storage, , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.60%
|
| C000012079 | Realty Income Corp., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.20%
|
| C000012079 | Ventas, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
4.10%
|
| C000012079 | Crown Castle, Inc., , , 0 |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.90%
|
| C000012079 | Specialized REITs |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
44.50%
|
| C000012079 | Residential REITs |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.60%
|
| C000012079 | Retail REITs |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
14.70%
|
| C000012079 | Health Care REITs |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
12.30%
|
| C000012079 | Industrial REITs |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.10%
|
| C000012079 | Hotel & Resort REITs |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.70%
|
| C000012079 | Office REITs |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|