v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000012064 [Member] | General Mills Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50% [1]
C000012064 [Member] | LyondellBasell Industries NV Class A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50% [1]
C000012064 [Member] | Edison International [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50% [1]
C000012064 [Member] | HP Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [1]
C000012064 [Member] | ONEOK Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80% [1]
C000012064 [Member] | Prudential Financial Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80% [1]
C000012064 [Member] | Verizon Communications Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [1]
C000012064 [Member] | T Rowe Price Group Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [1]
C000012064 [Member] | Pfizer Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [1]
C000012064 [Member] | Altria Group Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.30% [1]
C000012064 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.10% [1]
C000012064 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 24.90% [1]
C000012064 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [1]
C000012064 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [1]
C000012064 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [1]
C000012064 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.50% [1]
C000012064 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10% [1]
C000012064 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [1]
C000012064 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.80% [1]
C000012064 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 24.20% [1]
C000012097 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [2]
C000012097 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.20% [2]
C000012097 [Member] | Alphabet Inc Class A [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.60% [2]
C000012097 [Member] | Alphabet Inc Class C NVS [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.10% [2]
C000012097 [Member] | Meta Platforms Inc Class A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10% [2]
C000012097 [Member] | Tesla Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.70% [2]
C000012097 [Member] | Berkshire Hathaway Inc Class B [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.40% [2]
C000012097 [Member] | Broadcom Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.10% [2]
C000012097 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.30% [2]
C000012097 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [2]
C000012097 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50% [2]
C000012097 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.90% [2]
C000012097 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60% [2]
C000012097 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.20% [2]
C000012097 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [2]
C000012097 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [2]
C000012097 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.20% [2]
C000012097 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.80% [2]
C000012097 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [2]
C000012097 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.30% [2]
C000012097 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80% [2]
C000012099 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.60% [3]
C000012099 [Member] | Alphabet Inc Class A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [3]
C000012099 [Member] | Alphabet Inc Class C NVS [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [3]
C000012099 [Member] | Tesla Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50% [3]
C000012099 [Member] | Berkshire Hathaway Inc Class B [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [3]
C000012099 [Member] | JPMorgan Chase And Co [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [3]
C000012099 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.30% [3]
C000012099 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.20% [3]
C000012099 [Member] | Exxon Mobil Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [3]
C000012099 [Member] | Johnson And Johnson [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.70% [3]
C000012099 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [3]
C000012099 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.50% [3]
C000012099 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.60% [3]
C000012099 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.30% [3]
C000012099 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.50% [3]
C000012099 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.90% [3]
C000012099 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.60% [3]
C000012099 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.60% [3]
C000012099 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.60% [3]
C000012099 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.80% [3]
C000012099 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10% [3]
C000012195 [Member] | Newmont Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [4]
C000012195 [Member] | Williams Cos Inc The [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [4]
C000012195 [Member] | PNC Financial Services Group Inc The [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.20% [4]
C000012195 [Member] | FedEx Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.20% [4]
C000012195 [Member] | U S Bancorp [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.20% [4]
C000012195 [Member] | CSX Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.20% [4]
C000012195 [Member] | SLB Ltd [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.20% [4]
C000012195 [Member] | Elevance Health Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.10% [4]
C000012195 [Member] | United Parcel Service Inc Class B [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.10% [4]
C000012195 [Member] | Mondelez International Inc Class A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.10% [4]
C000012195 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.50% [4]
C000012195 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.80% [4]
C000012195 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [4]
C000012195 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50% [4]
C000012195 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10% [4]
C000012195 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [4]
C000012195 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.60% [4]
C000012195 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [4]
C000012195 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.30% [4]
C000012195 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [4]
C000012195 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.60% [4]
C000012196 [Member] | Ovintiv Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [5]
C000012196 [Member] | MACOM Technology Solutions Holdings Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [5]
C000012196 [Member] | Coeur Mining Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [5]
C000012196 [Member] | RBC Bearings Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [5]
C000012196 [Member] | ITT Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [5]
C000012196 [Member] | CF Industries Holdings Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [5]
C000012196 [Member] | ATI Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [5]
C000012196 [Member] | Albemarle Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.40% [5]
C000012196 [Member] | Revolution Medicines Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.40% [5]
C000012196 [Member] | Lumentum Holdings Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.10% [5]
C000012196 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [5]
C000012196 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [5]
C000012196 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.10% [5]
C000012196 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50% [5]
C000012196 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.50% [5]
C000012196 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.10% [5]
C000012196 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.50% [5]
C000012196 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.40% [5]
C000012196 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.50% [5]
C000012196 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50% [5]
C000012196 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.10% [5]
C000042588 [Member] | Welltower Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.30% [6]
C000042588 [Member] | Prologis Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [6]
C000042588 [Member] | Equinix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [6]
C000042588 [Member] | Digital Realty Trust Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.50% [6]
C000042588 [Member] | Simon Property Group Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.40% [6]
C000042588 [Member] | Realty Income Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.20% [6]
C000042588 [Member] | Public Storage [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [6]
C000042588 [Member] | Ventas Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.60% [6]
C000042588 [Member] | Iron Mountain Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20% [6]
C000042588 [Member] | VICI Properties Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [6]
C000042588 [Member] | Specialized REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.30% [6]
C000042588 [Member] | Health Care REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.20% [6]
C000042588 [Member] | Retail REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.50% [6]
C000042588 [Member] | Residential REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.70% [6]
C000042588 [Member] | Industrial REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.10% [6]
C000042588 [Member] | Office REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [6]
C000042588 [Member] | Hotel And Resort REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.10% [6]
C000042588 [Member] | Diversified REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [6]
C000099165 [Member] | Progressive Corp The [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.80% [7]
C000099165 [Member] | Coca Cola Co The [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90% [7]
C000099165 [Member] | Home Depot Inc The [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.10% [7]
C000099165 [Member] | Merck And Co Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.80% [7]
C000099165 [Member] | Chevron Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.40% [7]
C000099165 [Member] | Exxon Mobil Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.40% [7]
C000099165 [Member] | Johnson And Johnson [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.70% [7]
C000099165 [Member] | AbbVie Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.50% [7]
C000099165 [Member] | Procter And Gamble Co The [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.50% [7]
C000099165 [Member] | Philip Morris International Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.20% [7]
C000099165 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.20% [7]
C000099165 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [7]
C000099165 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.50% [7]
C000099165 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.10% [7]
C000099165 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 24.10% [7]
C000099165 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [7]
C000099165 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60% [7]
C000099165 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.20% [7]
C000099165 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.30% [7]
C000141931 [Member] | Broadcom Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30% [8]
C000141931 [Member] | JPMorgan Chase And Co [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.10% [8]
C000141931 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [8]
C000141931 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [8]
C000141931 [Member] | Exxon Mobil Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [8]
C000141931 [Member] | Johnson And Johnson [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [8]
C000141931 [Member] | AbbVie Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50% [8]
C000141931 [Member] | UnitedHealth Group Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.30% [8]
C000141931 [Member] | Procter And Gamble Co The [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10% [8]
C000141931 [Member] | Philip Morris International Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [8]
C000141931 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.50% [8]
C000141931 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.20% [8]
C000141931 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.40% [8]
C000141931 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [8]
C000141931 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.60% [8]
C000141931 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.50% [8]
C000141931 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.60% [8]
C000141931 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.50% [8]
C000141931 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.60% [8]
C000141931 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [8]
C000194634 [Member] | JPMorgan Chase And Co [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [9]
C000194634 [Member] | Exxon Mobil Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [9]
C000194634 [Member] | UnitedHealth Group Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [9]
C000194634 [Member] | Bank of America Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [9]
C000194634 [Member] | Wells Fargo And Co [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [9]
C000194634 [Member] | Dell Technologies Inc Class C [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [9]
C000194634 [Member] | Accenture PLC Class A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10% [9]
C000194634 [Member] | Texas Instruments Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [9]
C000194634 [Member] | QUALCOMM Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.50% [9]
C000194634 [Member] | Cisco Systems Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10% [9]
C000194634 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [9]
C000194634 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.00% [9]
C000194634 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.30% [9]
C000194634 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70% [9]
C000194634 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [9]
C000194634 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.40% [9]
C000194634 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.30% [9]
C000194634 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.90% [9]
C000194634 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [9]
C000194634 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.30% [9]
C000194634 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [9]
[1] Excludes money market funds.
[2]
Excludes money market funds.
[3]
Excludes money market funds.
[4]
Excludes money market funds.
[5]
Excludes money market funds.
[6]
Excludes money market funds.
[7] Excludes money market funds.
[8]
Excludes money market funds.
[9]
Excludes money market funds.