v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000012178 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000012178 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000012178 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000012178 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000012178 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 20.20%
C000012178 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
C000012178 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
C000012178 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
C000012178 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000012178 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000012178 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000012178 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000012179 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000012179 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000012179 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000012179 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000012179 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 20.20%
C000012179 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
C000012179 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
C000012179 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
C000012179 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000012179 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000012179 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000012179 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000012180 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
C000012180 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000012180 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000012180 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000012180 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
C000012180 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000012180 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000012180 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
C000012180 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000012180 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000012180 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000012180 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000012180 | SectorOther  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000012181 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
C000012181 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000012181 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000012181 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000012181 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
C000012181 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000012181 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000012181 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
C000012181 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000012181 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000012181 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000012181 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000012181 | SectorOther  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%