v3.25.2
Shareholder Report, Holdings (Details)
Jul. 31, 2025
C000022023 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000022023 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000022023 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [1]
C000022023 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.00% [1]
C000022023 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80% [1]
C000022023 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [1]
C000022023 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [1]
C000022023 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.20% [1]
C000022023 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [1]
C000022023 [Member] | Auto Parts And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [1]
C000022023 [Member] | Airlines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [1]
C000022023 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [1]
C000022023 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [1]
C000022023 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [1]
C000022023 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [1]
C000022023 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [1]
C000022023 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [1]
C000022023 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000022023 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 24.00%
C000022023 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
C000022023 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000022023 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 16.50%
C000022023 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000022023 [Member] | GREECE  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022023 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000022023 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
C000022023 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000022023 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.90%
C000022021 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000022021 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000022021 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [2]
C000022021 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.00% [2]
C000022021 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80% [2]
C000022021 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [2]
C000022021 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [2]
C000022021 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.20% [2]
C000022021 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [2]
C000022021 [Member] | Auto Parts And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [2]
C000022021 [Member] | Airlines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [2]
C000022021 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [2]
C000022021 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [2]
C000022021 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [2]
C000022021 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [2]
C000022021 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [2]
C000022021 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [2]
C000022021 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000022021 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 24.00%
C000022021 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
C000022021 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000022021 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 16.50%
C000022021 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000022021 [Member] | GREECE  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022021 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000022021 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
C000022021 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000022021 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.90%
C000022022 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000022022 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000022022 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [3]
C000022022 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.00% [3]
C000022022 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80% [3]
C000022022 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [3]
C000022022 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [3]
C000022022 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.20% [3]
C000022022 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [3]
C000022022 [Member] | Auto Parts And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [3]
C000022022 [Member] | Airlines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [3]
C000022022 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [3]
C000022022 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [3]
C000022022 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [3]
C000022022 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [3]
C000022022 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [3]
C000022022 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [3]
C000022022 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000022022 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 24.00%
C000022022 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
C000022022 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000022022 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 16.50%
C000022022 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000022022 [Member] | GREECE  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022022 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000022022 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
C000022022 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000022022 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.90%
C000022018 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000022018 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000022018 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [4]
C000022018 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [4]
C000022018 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [4]
C000022018 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [4]
C000022018 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [4]
C000022018 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [4]
C000022018 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [4]
C000022018 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [4]
C000022018 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [4]
C000022018 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [4]
C000022018 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [4]
C000022018 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [4]
C000022018 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [4]
C000022018 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [4]
C000022018 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [4]
C000022018 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000022018 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000022018 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000022018 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000022018 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
C000022018 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022018 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000022018 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022018 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000022018 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
C000022018 [Member] | DENMARK  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000022018 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000022018 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000022018 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000022018 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.80%
C000022019 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000022019 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000022019 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [5]
C000022019 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [5]
C000022019 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [5]
C000022019 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [5]
C000022019 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [5]
C000022019 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [5]
C000022019 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [5]
C000022019 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [5]
C000022019 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [5]
C000022019 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [5]
C000022019 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [5]
C000022019 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [5]
C000022019 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [5]
C000022019 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [5]
C000022019 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [5]
C000022019 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000022019 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000022019 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000022019 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000022019 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
C000022019 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022019 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000022019 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022019 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000022019 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
C000022019 [Member] | DENMARK  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000022019 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000022019 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000022019 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000022019 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.80%
C000022020 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000022020 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000022020 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [6]
C000022020 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [6]
C000022020 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [6]
C000022020 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [6]
C000022020 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [6]
C000022020 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [6]
C000022020 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [6]
C000022020 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [6]
C000022020 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [6]
C000022020 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [6]
C000022020 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [6]
C000022020 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [6]
C000022020 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [6]
C000022020 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [6]
C000022020 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [6]
C000022020 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000022020 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000022020 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000022020 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
C000022020 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
C000022020 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022020 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000022020 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022020 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000022020 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
C000022020 [Member] | DENMARK  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000022020 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000022020 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000022020 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000022020 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.80%
C000022028 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [7]
C000022028 [Member] | Moody's, Ca Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [7]
C000022028 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [7]
C000022028 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 48.10% [7]
C000022028 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 41.20% [7]
C000022028 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [7]
C000022028 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [8]
C000022028 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [8]
C000022028 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [8]
C000022028 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [8]
C000022028 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [8]
C000022028 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [8]
C000022028 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [8]
C000022028 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [8]
C000022028 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [8]
C000022028 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [8]
C000022028 [Member] | Container and Packaging Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [8]
C000022028 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [8]
C000022028 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [8]
C000022028 [Member] | Leisure Time [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [8]
C000022028 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [8]
C000022028 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000022028 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022028 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022028 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 95.90%
C000022027 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [9]
C000022027 [Member] | Moody's, Ca Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [9]
C000022027 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [9]
C000022027 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 48.10% [9]
C000022027 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 41.20% [9]
C000022027 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [9]
C000022027 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [10]
C000022027 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [10]
C000022027 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [10]
C000022027 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [10]
C000022027 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [10]
C000022027 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [10]
C000022027 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [10]
C000022027 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [10]
C000022027 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [10]
C000022027 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [10]
C000022027 [Member] | Container and Packaging Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [10]
C000022027 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [10]
C000022027 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [10]
C000022027 [Member] | Leisure Time [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [10]
C000022027 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [10]
C000022027 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000022027 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022027 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022027 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 95.90%
C000022026 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [11]
C000022026 [Member] | Moody's, Ca Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [11]
C000022026 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [11]
C000022026 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 48.10% [11]
C000022026 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 41.20% [11]
C000022026 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [11]
C000022026 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [12]
C000022026 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [12]
C000022026 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [12]
C000022026 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [12]
C000022026 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [12]
C000022026 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [12]
C000022026 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [12]
C000022026 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [12]
C000022026 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [12]
C000022026 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [12]
C000022026 [Member] | Container and Packaging Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [12]
C000022026 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [12]
C000022026 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [12]
C000022026 [Member] | Leisure Time [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [12]
C000022026 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [12]
C000022026 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000022026 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022026 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022026 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 95.90%
C000199994 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.80%
C000199994 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
C000199994 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [13]
C000199994 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [13]
C000199994 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50% [13]
C000199994 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [13]
C000199994 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.70% [13]
C000199994 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [13]
C000199994 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [13]
C000199994 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [13]
C000199994 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [13]
C000199994 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [13]
C000199994 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [13]
C000199994 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [13]
C000199994 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [13]
C000199994 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [13]
C000199994 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [13]
C000199994 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000199994 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 25.90%
C000199994 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
C000199994 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
C000199994 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 17.00%
C000199994 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000199994 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000199994 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
C000199994 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.40%
C000199993 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.80%
C000199993 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
C000199993 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [14]
C000199993 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [14]
C000199993 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50% [14]
C000199993 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [14]
C000199993 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.70% [14]
C000199993 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [14]
C000199993 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [14]
C000199993 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [14]
C000199993 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [14]
C000199993 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [14]
C000199993 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [14]
C000199993 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [14]
C000199993 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [14]
C000199993 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [14]
C000199993 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [14]
C000199993 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000199993 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 25.90%
C000199993 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
C000199993 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
C000199993 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 17.00%
C000199993 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000199993 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000199993 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
C000199993 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.40%
C000193967 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [15]
C000193967 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [15]
C000193967 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [15]
C000193967 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [15]
C000193967 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [15]
C000193967 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [15]
C000193967 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [15]
C000193967 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [15]
C000193967 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [15]
C000193967 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [15]
C000193967 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [15]
C000193967 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [15]
C000193967 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.70% [15]
C000193967 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [15]
C000193967 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [15]
C000193967 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000193967 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 70.80%
C000193967 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000193967 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.70%
C000193968 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [16]
C000193968 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [16]
C000193968 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [16]
C000193968 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [16]
C000193968 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [16]
C000193968 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [16]
C000193968 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [16]
C000193968 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [16]
C000193968 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [16]
C000193968 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [16]
C000193968 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [16]
C000193968 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [16]
C000193968 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.70% [16]
C000193968 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [16]
C000193968 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [16]
C000193968 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000193968 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 70.80%
C000193968 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000193968 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.70%
C000193973 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.80% [17]
C000193973 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 63.40% [17]
C000193973 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70% [17]
C000193973 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.50% [17]
C000193973 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [17]
C000193973 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [18]
C000193973 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [18]
C000193973 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [18]
C000193973 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [18]
C000193973 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [18]
C000193973 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [18]
C000193973 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [18]
C000193973 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [18]
C000193973 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [18]
C000193973 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [18]
C000193973 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [18]
C000193973 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.10% [18]
C000193973 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [18]
C000193973 [Member] | Multi National [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [18]
C000193973 [Member] | Foreign Government Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [18]
C000193973 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000193973 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
C000193973 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000193973 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000193973 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.10%
C000193973 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.60%
C000193973 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000193974 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.80% [19]
C000193974 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 63.40% [19]
C000193974 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70% [19]
C000193974 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.50% [19]
C000193974 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [19]
C000193974 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [20]
C000193974 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [20]
C000193974 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [20]
C000193974 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [20]
C000193974 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [20]
C000193974 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [20]
C000193974 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [20]
C000193974 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [20]
C000193974 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [20]
C000193974 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [20]
C000193974 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [20]
C000193974 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.10% [20]
C000193974 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [20]
C000193974 [Member] | Multi National [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [20]
C000193974 [Member] | Foreign Government Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [20]
C000193974 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000193974 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
C000193974 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000193974 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000193974 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.10%
C000193974 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.60%
C000193974 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000021986 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.60% [21]
C000021986 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [21]
C000021986 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.80% [21]
C000021986 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.40% [21]
C000021986 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.80% [21]
C000021986 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [21]
C000021986 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [21]
C000021986 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [22]
C000021986 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [22]
C000021986 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [22]
C000021986 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10% [22]
C000021986 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [22]
C000021986 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [22]
C000021986 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [22]
C000021986 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [22]
C000021986 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [22]
C000021986 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [22]
C000021986 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [22]
C000021986 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [22]
C000021986 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [22]
C000021986 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [22]
C000021986 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [22]
C000021986 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000021986 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000021986 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000021986 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.40%
C000021984 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.60% [23]
C000021984 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [23]
C000021984 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.80% [23]
C000021984 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.40% [23]
C000021984 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.80% [23]
C000021984 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [23]
C000021984 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [23]
C000021984 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [24]
C000021984 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [24]
C000021984 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [24]
C000021984 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10% [24]
C000021984 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [24]
C000021984 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [24]
C000021984 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [24]
C000021984 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [24]
C000021984 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [24]
C000021984 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [24]
C000021984 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [24]
C000021984 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [24]
C000021984 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [24]
C000021984 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [24]
C000021984 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [24]
C000021984 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000021984 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000021984 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000021984 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.40%
C000021985 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.60% [25]
C000021985 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [25]
C000021985 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.80% [25]
C000021985 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.40% [25]
C000021985 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.80% [25]
C000021985 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [25]
C000021985 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [25]
C000021985 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [26]
C000021985 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [26]
C000021985 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [26]
C000021985 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10% [26]
C000021985 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [26]
C000021985 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [26]
C000021985 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [26]
C000021985 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [26]
C000021985 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [26]
C000021985 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [26]
C000021985 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [26]
C000021985 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [26]
C000021985 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [26]
C000021985 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [26]
C000021985 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [26]
C000021985 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000021985 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000021985 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000021985 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.40%
C000021971 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.40% [27]
C000021971 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [27]
C000021971 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [27]
C000021971 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [27]
C000021971 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [27]
C000021971 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [27]
C000021971 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [27]
C000021971 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [27]
C000021971 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [27]
C000021971 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [27]
C000021971 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [27]
C000021971 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [27]
C000021971 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [27]
C000021971 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [27]
C000021971 [Member] | Distribution Wholesale [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [27]
C000021971 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000021971 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.20%
C000021970 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.40% [28]
C000021970 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [28]
C000021970 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [28]
C000021970 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [28]
C000021970 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [28]
C000021970 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [28]
C000021970 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [28]
C000021970 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [28]
C000021970 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [28]
C000021970 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [28]
C000021970 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [28]
C000021970 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [28]
C000021970 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [28]
C000021970 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [28]
C000021970 [Member] | Distribution Wholesale [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [28]
C000021970 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000021970 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.20%
C000021969 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.40% [29]
C000021969 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [29]
C000021969 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [29]
C000021969 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [29]
C000021969 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [29]
C000021969 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [29]
C000021969 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [29]
C000021969 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [29]
C000021969 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [29]
C000021969 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [29]
C000021969 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [29]
C000021969 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [29]
C000021969 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [29]
C000021969 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [29]
C000021969 [Member] | Distribution Wholesale [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [29]
C000021969 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000021969 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.20%
C000021992 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [30]
C000021992 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.20% [30]
C000021992 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [30]
C000021992 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [30]
C000021992 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [30]
C000021992 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [30]
C000021992 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [30]
C000021992 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [30]
C000021992 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [30]
C000021992 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [30]
C000021992 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [30]
C000021992 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [30]
C000021992 [Member] | Leisure Time [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [30]
C000021992 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [30]
C000021992 [Member] | Lodging [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [30]
C000021992 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021992 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021992 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021955 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.60% [31]
C000021955 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.00% [31]
C000021955 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [31]
C000021955 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [31]
C000021955 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.10% [31]
C000021955 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.50% [32]
C000021955 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [32]
C000021955 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50% [32]
C000021955 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [32]
C000021955 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [32]
C000021955 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [32]
C000021955 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [32]
C000021955 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [32]
C000021955 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [32]
C000021955 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [32]
C000021955 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [32]
C000021955 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [32]
C000021955 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021955 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000021955 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [32]
C000021955 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [32]
C000021955 [Member] | Credit Card Receivable [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [32]
C000021955 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000021955 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.60%
C000021955 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
C000021953 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.60% [33]
C000021953 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.00% [33]
C000021953 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [33]
C000021953 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [33]
C000021953 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.10% [33]
C000021953 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.50% [34]
C000021953 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [34]
C000021953 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50% [34]
C000021953 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [34]
C000021953 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [34]
C000021953 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [34]
C000021953 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [34]
C000021953 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [34]
C000021953 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [34]
C000021953 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [34]
C000021953 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [34]
C000021953 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [34]
C000021953 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021953 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000021953 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [34]
C000021953 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [34]
C000021953 [Member] | Credit Card Receivable [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [34]
C000021953 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000021953 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.60%
C000021953 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
C000021954 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.60% [35]
C000021954 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.00% [35]
C000021954 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [35]
C000021954 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [35]
C000021954 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.10% [35]
C000021954 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.50% [36]
C000021954 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [36]
C000021954 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50% [36]
C000021954 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [36]
C000021954 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [36]
C000021954 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [36]
C000021954 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [36]
C000021954 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [36]
C000021954 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [36]
C000021954 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [36]
C000021954 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [36]
C000021954 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [36]
C000021954 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021954 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000021954 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [36]
C000021954 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [36]
C000021954 [Member] | Credit Card Receivable [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [36]
C000021954 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000021954 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.60%
C000021954 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
C000021962 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [37]
C000021962 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00% [37]
C000021962 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.30% [37]
C000021962 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [37]
C000021962 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [37]
C000021962 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [37]
C000021962 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [37]
C000021962 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [37]
C000021962 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [37]
C000021962 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [37]
C000021962 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [37]
C000021962 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [37]
C000021962 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [37]
C000021962 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [37]
C000021962 [Member] | Oil And Gas Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [37]
C000021962 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021962 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
C000021962 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000021960 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [38]
C000021960 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00% [38]
C000021960 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.30% [38]
C000021960 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [38]
C000021960 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [38]
C000021960 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [38]
C000021960 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [38]
C000021960 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [38]
C000021960 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [38]
C000021960 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [38]
C000021960 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [38]
C000021960 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [38]
C000021960 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [38]
C000021960 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [38]
C000021960 [Member] | Oil And Gas Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [38]
C000021960 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021960 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
C000021960 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000021961 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [39]
C000021961 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00% [39]
C000021961 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.30% [39]
C000021961 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [39]
C000021961 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [39]
C000021961 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [39]
C000021961 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [39]
C000021961 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [39]
C000021961 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [39]
C000021961 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [39]
C000021961 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [39]
C000021961 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [39]
C000021961 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [39]
C000021961 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [39]
C000021961 [Member] | Oil And Gas Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [39]
C000021961 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021961 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
C000021961 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000022031 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.40% [40]
C000022031 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 54.60% [40]
C000022031 [Member] | Moody's, C Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [40]
C000022031 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.10% [40]
C000022031 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.60% [40]
C000022031 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.70% [40]
C000022031 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80% [40]
C000022031 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [40]
C000022031 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [41]
C000022031 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50% [41]
C000022031 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [41]
C000022031 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [41]
C000022031 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [41]
C000022031 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [41]
C000022031 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [41]
C000022031 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [41]
C000022031 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [41]
C000022031 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [41]
C000022031 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30% [41]
C000022031 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.90% [41]
C000022031 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [41]
C000022031 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.20%)
C000022031 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000022031 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000022031 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [41]
C000022031 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022031 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [41]
C000022031 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
C000022031 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.90%
C000022031 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.30%
C000022031 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000022031 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000022029 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.40% [42]
C000022029 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 54.60% [42]
C000022029 [Member] | Moody's, C Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [42]
C000022029 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.10% [42]
C000022029 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.60% [42]
C000022029 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.70% [42]
C000022029 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80% [42]
C000022029 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [42]
C000022029 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [43]
C000022029 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50% [43]
C000022029 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [43]
C000022029 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [43]
C000022029 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [43]
C000022029 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [43]
C000022029 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [43]
C000022029 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [43]
C000022029 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [43]
C000022029 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [43]
C000022029 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30% [43]
C000022029 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.90% [43]
C000022029 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [43]
C000022029 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.20%)
C000022029 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000022029 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000022029 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [43]
C000022029 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022029 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [43]
C000022029 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
C000022029 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.90%
C000022029 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.30%
C000022029 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000022029 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000022030 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.40% [44]
C000022030 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 54.60% [44]
C000022030 [Member] | Moody's, C Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [44]
C000022030 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.10% [44]
C000022030 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.60% [44]
C000022030 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.70% [44]
C000022030 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80% [44]
C000022030 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [44]
C000022030 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [45]
C000022030 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50% [45]
C000022030 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [45]
C000022030 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [45]
C000022030 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [45]
C000022030 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [45]
C000022030 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [45]
C000022030 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [45]
C000022030 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [45]
C000022030 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [45]
C000022030 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30% [45]
C000022030 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.90% [45]
C000022030 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [45]
C000022030 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.20%)
C000022030 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000022030 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000022030 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [45]
C000022030 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022030 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [45]
C000022030 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
C000022030 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.90%
C000022030 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.30%
C000022030 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000022030 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000109363 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
C000109363 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000109363 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
C000109363 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000109363 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.10%
C000109363 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000109363 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000109363 [Member] | International Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000169131 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
C000169131 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000169131 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
C000169131 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000169131 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.10%
C000169131 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000169131 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000169131 [Member] | International Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000177074 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [46]
C000177074 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [46]
C000177074 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [46]
C000177074 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [46]
C000177074 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [46]
C000177074 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [46]
C000177074 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [46]
C000177074 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [46]
C000177074 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [46]
C000177074 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [46]
C000177074 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [46]
C000177074 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [46]
C000177074 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [46]
C000177074 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [46]
C000177074 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [46]
C000177074 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177074 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.10%
C000177074 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000177073 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [47]
C000177073 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [47]
C000177073 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [47]
C000177073 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [47]
C000177073 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [47]
C000177073 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [47]
C000177073 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [47]
C000177073 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [47]
C000177073 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [47]
C000177073 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [47]
C000177073 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [47]
C000177073 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [47]
C000177073 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [47]
C000177073 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [47]
C000177073 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [47]
C000177073 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177073 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.10%
C000177073 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000171605 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [48]
C000171605 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [48]
C000171605 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [48]
C000171605 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [48]
C000171605 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [48]
C000171605 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [48]
C000171605 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [48]
C000171605 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [48]
C000171605 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [48]
C000171605 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [48]
C000171605 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [48]
C000171605 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [48]
C000171605 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [48]
C000171605 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00% [48]
C000171605 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00% [48]
C000171605 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000171605 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.70%
C000171605 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
C000171605 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000171605 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000171605 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
C000171605 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
C000171605 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000171605 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000171605 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000171605 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000171605 [Member] | Loans [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000199992 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [49]
C000199992 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [49]
C000199992 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [49]
C000199992 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [49]
C000199992 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [49]
C000199992 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [49]
C000199992 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [49]
C000199992 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [49]
C000199992 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [49]
C000199992 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [49]
C000199992 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [49]
C000199992 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [49]
C000199992 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [49]
C000199992 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [49]
C000199992 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [49]
C000199992 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000199992 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
C000199992 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000199992 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000199991 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [50]
C000199991 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [50]
C000199991 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [50]
C000199991 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [50]
C000199991 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [50]
C000199991 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [50]
C000199991 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [50]
C000199991 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [50]
C000199991 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [50]
C000199991 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [50]
C000199991 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [50]
C000199991 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [50]
C000199991 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [50]
C000199991 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [50]
C000199991 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [50]
C000199991 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000199991 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.00%
C000199991 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000199991 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000022012 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000022012 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022012 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [51]
C000022012 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [51]
C000022012 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [51]
C000022012 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [51]
C000022012 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [51]
C000022012 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10% [51]
C000022012 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [51]
C000022012 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [51]
C000022012 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [51]
C000022012 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [51]
C000022012 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [51]
C000022012 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [51]
C000022012 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [51]
C000022012 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [51]
C000022012 [Member] | Repurchase Agreements Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [51]
C000022012 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000022012 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022012 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022012 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022012 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000022012 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000022012 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000022012 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022012 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 95.50%
C000022012 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000022013 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000022013 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022013 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [52]
C000022013 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [52]
C000022013 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [52]
C000022013 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [52]
C000022013 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [52]
C000022013 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10% [52]
C000022013 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [52]
C000022013 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [52]
C000022013 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [52]
C000022013 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [52]
C000022013 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [52]
C000022013 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [52]
C000022013 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [52]
C000022013 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [52]
C000022013 [Member] | Repurchase Agreements Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [52]
C000022013 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000022013 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022013 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022013 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022013 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000022013 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000022013 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000022013 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022013 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 95.50%
C000022013 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000022014 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000022014 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022014 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [53]
C000022014 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [53]
C000022014 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [53]
C000022014 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [53]
C000022014 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [53]
C000022014 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10% [53]
C000022014 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [53]
C000022014 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [53]
C000022014 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [53]
C000022014 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [53]
C000022014 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [53]
C000022014 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [53]
C000022014 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [53]
C000022014 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [53]
C000022014 [Member] | Repurchase Agreements Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [53]
C000022014 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000022014 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022014 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022014 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022014 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000022014 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000022014 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000022014 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022014 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 95.50%
C000022014 [Member] | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000022001 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.60% [54]
C000022001 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.30% [54]
C000022001 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60% [54]
C000022001 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [54]
C000022001 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [54]
C000022001 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [54]
C000022001 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [54]
C000022001 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [54]
C000022001 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [54]
C000022001 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [54]
C000022001 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [54]
C000022001 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [54]
C000022001 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [54]
C000022001 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [54]
C000022001 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000022001 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.30%
C000022001 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000022001 [Member] | Private Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [54]
C000022003 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.60% [55]
C000022003 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.30% [55]
C000022003 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60% [55]
C000022003 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [55]
C000022003 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [55]
C000022003 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [55]
C000022003 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [55]
C000022003 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [55]
C000022003 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [55]
C000022003 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [55]
C000022003 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [55]
C000022003 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [55]
C000022003 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [55]
C000022003 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [55]
C000022003 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000022003 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.30%
C000022003 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000022003 [Member] | Private Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [55]
C000022002 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.60% [56]
C000022002 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.30% [56]
C000022002 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60% [56]
C000022002 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [56]
C000022002 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90% [56]
C000022002 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [56]
C000022002 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [56]
C000022002 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [56]
C000022002 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [56]
C000022002 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [56]
C000022002 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [56]
C000022002 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [56]
C000022002 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [56]
C000022002 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [56]
C000022002 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000022002 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.30%
C000022002 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000022002 [Member] | Private Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [56]
C000214975 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [57]
C000214975 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [57]
C000214975 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50% [57]
C000214975 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [57]
C000214975 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [57]
C000214975 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [57]
C000214975 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [57]
C000214975 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [57]
C000214975 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [57]
C000214975 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [57]
C000214975 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [57]
C000214975 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [57]
C000214975 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [57]
C000214975 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [57]
C000214975 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [57]
C000214975 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000214975 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000214975 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000214976 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [58]
C000214976 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [58]
C000214976 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50% [58]
C000214976 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [58]
C000214976 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [58]
C000214976 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [58]
C000214976 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [58]
C000214976 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [58]
C000214976 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [58]
C000214976 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [58]
C000214976 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [58]
C000214976 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [58]
C000214976 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [58]
C000214976 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [58]
C000214976 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [58]
C000214976 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000214976 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000214976 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000199998 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000199998 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.00%
C000199998 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.50%
C000199998 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
C000199997 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000199997 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.00%
C000199997 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.50%
C000199997 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
C000211493 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000211493 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000211493 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [59]
C000211493 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50% [59]
C000211493 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [59]
C000211493 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60% [59]
C000211493 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [59]
C000211493 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [59]
C000211493 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [59]
C000211493 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [59]
C000211493 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [59]
C000211493 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [59]
C000211493 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [59]
C000211493 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [59]
C000211493 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [59]
C000211493 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [59]
C000211493 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [59]
C000211493 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000211493 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000211493 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
C000211493 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000211493 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000211493 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000211493 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000211493 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000211493 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000211493 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000211493 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000211493 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000211493 [Member] | ISRAEL  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000211493 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000211493 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000211494 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000211494 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000211494 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [60]
C000211494 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50% [60]
C000211494 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [60]
C000211494 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60% [60]
C000211494 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [60]
C000211494 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [60]
C000211494 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [60]
C000211494 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [60]
C000211494 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [60]
C000211494 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [60]
C000211494 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [60]
C000211494 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [60]
C000211494 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [60]
C000211494 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [60]
C000211494 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [60]
C000211494 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000211494 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000211494 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
C000211494 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000211494 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000211494 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000211494 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000211494 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000211494 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000211494 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000211494 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000211494 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000211494 [Member] | ISRAEL  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000211494 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000211494 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000199996 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000199996 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.00%
C000199996 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
C000199996 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.10%
C000199995 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000199995 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.00%
C000199995 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
C000199995 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.10%
C000199989 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [61]
C000199989 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.20% [61]
C000199989 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.90% [61]
C000199989 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [61]
C000199989 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [61]
C000199989 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [61]
C000199989 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [61]
C000199989 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [61]
C000199989 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [61]
C000199989 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [61]
C000199989 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [61]
C000199989 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [61]
C000199989 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [61]
C000199989 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [61]
C000199989 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [61]
C000199989 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000199989 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000199989 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000199990 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [62]
C000199990 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.20% [62]
C000199990 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.90% [62]
C000199990 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [62]
C000199990 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [62]
C000199990 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [62]
C000199990 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [62]
C000199990 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [62]
C000199990 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [62]
C000199990 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [62]
C000199990 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [62]
C000199990 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [62]
C000199990 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [62]
C000199990 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [62]
C000199990 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [62]
C000199990 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000199990 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000199990 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000022009 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022009 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022009 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [63]
C000022009 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.50% [63]
C000022009 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [63]
C000022009 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [63]
C000022009 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [63]
C000022009 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [63]
C000022009 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [63]
C000022009 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [63]
C000022009 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [63]
C000022009 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [63]
C000022009 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [63]
C000022009 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [63]
C000022009 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [63]
C000022009 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [63]
C000022009 [Member] | Distribution Wholesale [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [63]
C000022009 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000022009 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000022009 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000022009 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.00%
C000022009 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 24.70%
C000022009 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022009 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000022009 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000022009 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022009 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000022009 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022009 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.20%
C000022009 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000022010 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022010 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022010 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [64]
C000022010 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.50% [64]
C000022010 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [64]
C000022010 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [64]
C000022010 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [64]
C000022010 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [64]
C000022010 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [64]
C000022010 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [64]
C000022010 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [64]
C000022010 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [64]
C000022010 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [64]
C000022010 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [64]
C000022010 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [64]
C000022010 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [64]
C000022010 [Member] | Distribution Wholesale [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [64]
C000022010 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000022010 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000022010 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000022010 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.00%
C000022010 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 24.70%
C000022010 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022010 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000022010 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000022010 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022010 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000022010 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022010 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.20%
C000022010 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000022011 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022011 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022011 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [65]
C000022011 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.50% [65]
C000022011 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [65]
C000022011 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [65]
C000022011 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [65]
C000022011 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [65]
C000022011 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [65]
C000022011 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [65]
C000022011 [Member] | Beverages [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [65]
C000022011 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [65]
C000022011 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [65]
C000022011 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [65]
C000022011 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [65]
C000022011 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [65]
C000022011 [Member] | Distribution Wholesale [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [65]
C000022011 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000022011 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000022011 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000022011 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.00%
C000022011 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 24.70%
C000022011 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022011 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000022011 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000022011 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022011 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000022011 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022011 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.20%
C000022011 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000193970 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [66]
C000193970 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [66]
C000193970 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [66]
C000193970 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [66]
C000193970 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [66]
C000193970 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [66]
C000193970 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [66]
C000193970 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [66]
C000193970 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [66]
C000193970 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [66]
C000193970 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [66]
C000193970 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [66]
C000193970 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [66]
C000193970 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [66]
C000193970 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [66]
C000193970 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000193970 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.80%
C000193970 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000193970 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000193970 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000193970 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000193970 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000193970 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000193970 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000193969 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [67]
C000193969 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [67]
C000193969 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [67]
C000193969 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [67]
C000193969 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [67]
C000193969 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [67]
C000193969 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [67]
C000193969 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [67]
C000193969 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [67]
C000193969 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [67]
C000193969 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [67]
C000193969 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [67]
C000193969 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [67]
C000193969 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [67]
C000193969 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [67]
C000193969 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000193969 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.80%
C000193969 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000193969 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000193969 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000193969 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000193969 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000193969 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000193969 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000021987 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [68]
C000021987 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.40% [68]
C000021987 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [68]
C000021987 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000021987 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000021998 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [69]
C000021998 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [69]
C000021998 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [69]
C000021998 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [69]
C000021998 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [69]
C000021998 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [69]
C000021998 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [69]
C000021998 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [69]
C000021998 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [69]
C000021998 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [69]
C000021998 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [69]
C000021998 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [69]
C000021998 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [69]
C000021998 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [69]
C000021998 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [69]
C000021998 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000021998 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.30%
C000021988 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [70]
C000021988 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.40% [70]
C000021988 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [70]
C000021988 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000021988 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000021989 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [71]
C000021989 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.40% [71]
C000021989 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [71]
C000021989 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000021989 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000022017 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
C000022017 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80% [72]
C000022017 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 63.80% [72]
C000022017 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.10% [72]
C000022017 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60% [72]
C000022017 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [72]
C000022017 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [72]
C000022017 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [72]
C000022017 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [72]
C000022017 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [73]
C000022017 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [73]
C000022017 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [73]
C000022017 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [73]
C000022017 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [73]
C000022017 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [73]
C000022017 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [73]
C000022017 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022017 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000022017 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000022017 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000022017 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000022017 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000022017 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022017 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000022017 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000022017 [Member] | CAYMAN ISLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000022017 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (54.90%)
C000022017 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [73]
C000022017 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [73]
C000022017 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [73]
C000022017 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.60% [73]
C000022017 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [73]
C000022017 [Member] | Credit Card Receivable [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [73]
C000022017 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60% [73]
C000022017 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 78.80% [73]
C000022015 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
C000022015 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80% [74]
C000022015 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 63.80% [74]
C000022015 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.10% [74]
C000022015 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60% [74]
C000022015 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [74]
C000022015 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [74]
C000022015 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [74]
C000022015 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [74]
C000022015 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [75]
C000022015 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [75]
C000022015 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [75]
C000022015 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [75]
C000022015 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [75]
C000022015 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [75]
C000022015 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [75]
C000022015 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022015 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000022015 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000022015 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000022015 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000022015 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000022015 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022015 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000022015 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000022015 [Member] | CAYMAN ISLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000022015 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (54.90%)
C000022015 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [75]
C000022015 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [75]
C000022015 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [75]
C000022015 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.60% [75]
C000022015 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [75]
C000022015 [Member] | Credit Card Receivable [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [75]
C000022015 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60% [75]
C000022015 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 78.80% [75]
C000022016 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
C000022016 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80% [76]
C000022016 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 63.80% [76]
C000022016 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.10% [76]
C000022016 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60% [76]
C000022016 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [76]
C000022016 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [76]
C000022016 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [76]
C000022016 [Member] | Caa [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [76]
C000022016 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [77]
C000022016 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [77]
C000022016 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [77]
C000022016 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [77]
C000022016 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40% [77]
C000022016 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [77]
C000022016 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022016 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022016 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000022016 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000022016 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000022016 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000022016 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000022016 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022016 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000022016 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000022016 [Member] | CAYMAN ISLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000022016 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (54.90%)
C000022016 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [77]
C000022016 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [77]
C000022016 [Member] | Auto Loan Receivables [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [77]
C000022016 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.60% [77]
C000022016 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [77]
C000022016 [Member] | Credit Card Receivable [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [77]
C000022016 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60% [77]
C000022016 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 78.80% [77]
C000109738 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [78]
C000109738 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [78]
C000109738 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [78]
C000109738 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60% [78]
C000109738 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [78]
C000109738 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [78]
C000109738 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [78]
C000109738 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [78]
C000109738 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [78]
C000109738 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [78]
C000109738 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [78]
C000109738 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [78]
C000109738 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [78]
C000109738 [Member] | Container and Packaging Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [78]
C000109738 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [78]
C000109738 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000109738 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
C000022007 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [79]
C000022007 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [79]
C000022007 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [79]
C000022007 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60% [79]
C000022007 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [79]
C000022007 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [79]
C000022007 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [79]
C000022007 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [79]
C000022007 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [79]
C000022007 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [79]
C000022007 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [79]
C000022007 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [79]
C000022007 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [79]
C000022007 [Member] | Container and Packaging Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [79]
C000022007 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [79]
C000022007 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022007 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
C000022008 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [80]
C000022008 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [80]
C000022008 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [80]
C000022008 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60% [80]
C000022008 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [80]
C000022008 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [80]
C000022008 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [80]
C000022008 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [80]
C000022008 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [80]
C000022008 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [80]
C000022008 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [80]
C000022008 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [80]
C000022008 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [80]
C000022008 [Member] | Container and Packaging Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [80]
C000022008 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [80]
C000022008 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000022008 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
C000109739 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000109739 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000109739 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [81]
C000109739 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.80% [81]
C000109739 [Member] | Auto Parts And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [81]
C000109739 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [81]
C000109739 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [81]
C000109739 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [81]
C000109739 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [81]
C000109739 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [81]
C000109739 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80% [81]
C000109739 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [81]
C000109739 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [81]
C000109739 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [81]
C000109739 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [81]
C000109739 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [81]
C000109739 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [81]
C000109739 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000109739 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000109739 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000109739 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.50%
C000109739 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
C000109739 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000109739 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000109739 [Member] | JERSEY  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000109739 [Member] | LUXEMBOURG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000109739 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000109739 [Member] | DENMARK  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000109739 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000109739 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000109739 [Member] | NORWAY  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000109739 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000109739 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000109739 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000109739 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.10%
C000022024 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000022024 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000022024 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [82]
C000022024 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.80% [82]
C000022024 [Member] | Auto Parts And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [82]
C000022024 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [82]
C000022024 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [82]
C000022024 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [82]
C000022024 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [82]
C000022024 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [82]
C000022024 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80% [82]
C000022024 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [82]
C000022024 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [82]
C000022024 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [82]
C000022024 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [82]
C000022024 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [82]
C000022024 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [82]
C000022024 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000022024 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022024 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000022024 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.50%
C000022024 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
C000022024 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022024 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022024 [Member] | JERSEY  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000022024 [Member] | LUXEMBOURG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022024 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000022024 [Member] | DENMARK  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000022024 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022024 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000022024 [Member] | NORWAY  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000022024 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022024 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000022024 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000022024 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.10%
C000022034 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [83]
C000022034 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [83]
C000022034 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [83]
C000022034 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [83]
C000022034 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [83]
C000022034 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [83]
C000022034 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [83]
C000022034 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [83]
C000022034 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [83]
C000022034 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [83]
C000022034 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [83]
C000022034 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [83]
C000022034 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [83]
C000022034 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [83]
C000022034 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000022034 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.30%
C000022034 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000022034 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022034 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000022034 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [83]
C000022034 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022034 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000022034 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
C000022034 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000022032 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [84]
C000022032 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [84]
C000022032 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [84]
C000022032 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [84]
C000022032 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [84]
C000022032 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [84]
C000022032 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [84]
C000022032 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [84]
C000022032 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [84]
C000022032 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [84]
C000022032 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [84]
C000022032 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [84]
C000022032 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [84]
C000022032 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [84]
C000022032 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000022032 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.30%
C000022032 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000022032 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022032 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000022032 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [84]
C000022032 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022032 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000022032 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
C000022032 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000022033 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [85]
C000022033 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [85]
C000022033 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [85]
C000022033 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [85]
C000022033 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [85]
C000022033 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [85]
C000022033 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [85]
C000022033 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [85]
C000022033 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [85]
C000022033 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [85]
C000022033 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [85]
C000022033 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [85]
C000022033 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [85]
C000022033 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [85]
C000022033 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000022033 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.30%
C000022033 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000022033 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022033 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000022033 [Member] | Other Asset Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [85]
C000022033 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022033 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000022033 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
C000022033 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000022025 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000022025 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000022025 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [86]
C000022025 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.80% [86]
C000022025 [Member] | Auto Parts And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [86]
C000022025 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [86]
C000022025 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [86]
C000022025 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [86]
C000022025 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [86]
C000022025 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [86]
C000022025 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80% [86]
C000022025 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [86]
C000022025 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [86]
C000022025 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [86]
C000022025 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [86]
C000022025 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [86]
C000022025 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [86]
C000022025 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000022025 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022025 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000022025 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.50%
C000022025 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
C000022025 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000022025 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000022025 [Member] | JERSEY  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000022025 [Member] | LUXEMBOURG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000022025 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000022025 [Member] | DENMARK  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000022025 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000022025 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000022025 [Member] | NORWAY  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000022025 [Member] | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000022025 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000022025 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000022025 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.10%
C000199999 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000199999 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.90%
C000199999 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.80%
C000199999 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000200000 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000200000 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.90%
C000200000 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.80%
C000200000 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000222244 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000222244 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
C000222244 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000222244 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000222243 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000222243 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
C000222243 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000222243 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000022035 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [87]
C000022035 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [87]
C000022035 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [87]
C000022035 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [87]
C000022035 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [87]
C000022035 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [87]
C000022035 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [87]
C000022035 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [87]
C000022035 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [87]
C000022035 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [87]
C000022035 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [87]
C000022035 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [87]
C000022035 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [87]
C000022035 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [87]
C000022035 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [87]
C000022035 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.00%)
C000022035 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000022035 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000022035 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000022035 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40%
C000022035 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
C000022035 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000022035 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000022035 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022036 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [88]
C000022036 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [88]
C000022036 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [88]
C000022036 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [88]
C000022036 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [88]
C000022036 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [88]
C000022036 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [88]
C000022036 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [88]
C000022036 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [88]
C000022036 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [88]
C000022036 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [88]
C000022036 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [88]
C000022036 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [88]
C000022036 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [88]
C000022036 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [88]
C000022036 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.00%)
C000022036 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000022036 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000022036 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000022036 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40%
C000022036 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
C000022036 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000022036 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000022036 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022037 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [89]
C000022037 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [89]
C000022037 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [89]
C000022037 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [89]
C000022037 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [89]
C000022037 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [89]
C000022037 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [89]
C000022037 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [89]
C000022037 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [89]
C000022037 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [89]
C000022037 [Member] | Agricultural Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [89]
C000022037 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [89]
C000022037 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [89]
C000022037 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [89]
C000022037 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [89]
C000022037 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.00%)
C000022037 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000022037 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000022037 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000022037 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40%
C000022037 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
C000022037 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000022037 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000022037 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000171604 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
C000171604 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 52.10% [90]
C000171604 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [90]
C000171604 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60% [90]
C000171604 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.20% [90]
C000171604 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.10% [90]
C000171604 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [91]
C000171604 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [91]
C000171604 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [91]
C000171604 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [91]
C000171604 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [91]
C000171604 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10% [91]
C000171604 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [91]
C000171604 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [91]
C000171604 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [91]
C000171604 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [91]
C000171604 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [91]
C000171604 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [91]
C000171604 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [91]
C000171604 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [91]
C000171604 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000171604 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000171604 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000171604 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.70%
C000171604 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000171604 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000171604 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [91]
C000164959 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
C000164959 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 52.10% [92]
C000164959 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [92]
C000164959 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60% [92]
C000164959 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.20% [92]
C000164959 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.10% [92]
C000164959 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [93]
C000164959 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [93]
C000164959 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [93]
C000164959 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [93]
C000164959 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [93]
C000164959 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10% [93]
C000164959 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [93]
C000164959 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [93]
C000164959 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [93]
C000164959 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [93]
C000164959 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [93]
C000164959 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [93]
C000164959 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [93]
C000164959 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [93]
C000164959 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000164959 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000164959 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000164959 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.70%
C000164959 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000164959 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000164959 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [93]
C000177076 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [94]
C000177076 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [94]
C000177076 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [94]
C000177076 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [94]
C000177076 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [94]
C000177076 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [94]
C000177076 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [94]
C000177076 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [94]
C000177076 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [94]
C000177076 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [94]
C000177076 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [94]
C000177076 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [94]
C000177076 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [94]
C000177076 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [94]
C000177076 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [94]
C000177076 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000177076 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.90%
C000177076 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000021993 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [95]
C000021993 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.20% [95]
C000021993 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [95]
C000021993 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [95]
C000021993 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [95]
C000021993 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [95]
C000021993 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [95]
C000021993 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [95]
C000021993 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [95]
C000021993 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [95]
C000021993 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [95]
C000021993 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [95]
C000021993 [Member] | Leisure Time [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [95]
C000021993 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [95]
C000021993 [Member] | Lodging [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [95]
C000021993 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021993 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021993 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021994 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [96]
C000021994 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.20% [96]
C000021994 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [96]
C000021994 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [96]
C000021994 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [96]
C000021994 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [96]
C000021994 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [96]
C000021994 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [96]
C000021994 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [96]
C000021994 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [96]
C000021994 [Member] | Entertainment Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [96]
C000021994 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [96]
C000021994 [Member] | Leisure Time [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [96]
C000021994 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [96]
C000021994 [Member] | Lodging [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [96]
C000021994 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021994 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021994 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000177080 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177080 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 67.50%
C000177080 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
C000177080 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
C000177079 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177079 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 67.50%
C000177079 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
C000177079 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
C000177071 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000177071 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000177071 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [97]
C000177071 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [97]
C000177071 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [97]
C000177071 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50% [97]
C000177071 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [97]
C000177071 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [97]
C000177071 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [97]
C000177071 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [97]
C000177071 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [97]
C000177071 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [97]
C000177071 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [97]
C000177071 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [97]
C000177071 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [97]
C000177071 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [97]
C000177071 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [97]
C000177071 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000177071 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000177071 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.60%
C000177071 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000177071 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000177071 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000177071 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000177071 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000177071 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000177071 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000177071 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000177071 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000177071 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.30%
C000177072 [Member] | Other Countries [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000177072 [Member] | Other assets less liabilities country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000177072 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [98]
C000177072 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [98]
C000177072 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [98]
C000177072 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50% [98]
C000177072 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20% [98]
C000177072 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [98]
C000177072 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [98]
C000177072 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [98]
C000177072 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [98]
C000177072 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [98]
C000177072 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [98]
C000177072 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [98]
C000177072 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [98]
C000177072 [Member] | Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [98]
C000177072 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [98]
C000177072 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000177072 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000177072 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.60%
C000177072 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000177072 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000177072 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000177072 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000177072 [Member] | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000177072 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000177072 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000177072 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000177072 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000177072 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.30%
C000177077 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177077 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 52.20%
C000177077 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000177077 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.60%
C000177078 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177078 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 52.20%
C000177078 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000177078 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.60%
C000191735 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [99]
C000191735 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60% [99]
C000191735 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [99]
C000191735 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [99]
C000191735 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [99]
C000191735 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [99]
C000191735 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [99]
C000191735 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [99]
C000191735 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [99]
C000191735 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [99]
C000191735 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [99]
C000191735 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [99]
C000191735 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [99]
C000191735 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [99]
C000191735 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.80% [99]
C000191735 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (3.90%)
C000191735 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.20%
C000191735 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000191735 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000191735 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000191735 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
C000191735 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000191735 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000191736 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [100]
C000191736 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60% [100]
C000191736 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [100]
C000191736 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [100]
C000191736 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [100]
C000191736 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [100]
C000191736 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [100]
C000191736 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [100]
C000191736 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [100]
C000191736 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [100]
C000191736 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [100]
C000191736 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [100]
C000191736 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [100]
C000191736 [Member] | Collateralized Mortgage Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [100]
C000191736 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.80% [100]
C000191736 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (3.90%)
C000191736 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.20%
C000191736 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000191736 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000191736 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000191736 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
C000191736 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000191736 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000193972 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
C000193972 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
C000193972 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 49.00%
C000193972 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000193972 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.70%
C000193972 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000193972 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000193971 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
C000193971 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
C000193971 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 49.00%
C000193971 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000193971 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.70%
C000193971 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000193971 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000021983 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00% [101]
C000021983 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.30% [101]
C000021983 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60% [101]
C000021983 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [101]
C000021983 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [101]
C000021983 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [101]
C000021983 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [101]
C000021983 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [101]
C000021983 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [101]
C000021983 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [101]
C000021983 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [101]
C000021983 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [101]
C000021983 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [101]
C000021983 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [101]
C000021983 [Member] | Apparel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [101]
C000021983 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000021983 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021983 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021983 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000021981 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00% [102]
C000021981 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.30% [102]
C000021981 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60% [102]
C000021981 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [102]
C000021981 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [102]
C000021981 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [102]
C000021981 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [102]
C000021981 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [102]
C000021981 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [102]
C000021981 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [102]
C000021981 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [102]
C000021981 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [102]
C000021981 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [102]
C000021981 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [102]
C000021981 [Member] | Apparel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [102]
C000021981 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000021981 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021981 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021981 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000021982 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00% [103]
C000021982 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.30% [103]
C000021982 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60% [103]
C000021982 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [103]
C000021982 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [103]
C000021982 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [103]
C000021982 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [103]
C000021982 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [103]
C000021982 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [103]
C000021982 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [103]
C000021982 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [103]
C000021982 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [103]
C000021982 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [103]
C000021982 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [103]
C000021982 [Member] | Apparel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [103]
C000021982 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000021982 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021982 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021982 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000021991 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [104]
C000021991 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.20% [104]
C000021991 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [104]
C000021991 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [104]
C000021991 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [104]
C000021991 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [104]
C000021991 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [104]
C000021991 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [104]
C000021991 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [104]
C000021991 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60% [104]
C000021991 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [104]
C000021991 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [104]
C000021991 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [104]
C000021991 [Member] | Lodging [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [104]
C000021991 [Member] | Metal Fabricate Hardware [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [104]
C000021991 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000021991 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.90%
C000021991 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000164960 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [105]
C000164960 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [105]
C000164960 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80% [105]
C000164960 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [105]
C000164960 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [105]
C000164960 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [105]
C000164960 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [105]
C000164960 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [105]
C000164960 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [105]
C000164960 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [105]
C000164960 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [105]
C000164960 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [105]
C000164960 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [105]
C000164960 [Member] | Short Term Investments Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00% [105]
C000164960 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00% [105]
C000164960 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000164960 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.70%
C000164960 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
C000164960 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000164960 [Member] | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000164960 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
C000164960 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
C000164960 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000164960 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000164960 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000164960 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000164960 [Member] | Loans [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000177075 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [106]
C000177075 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [106]
C000177075 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [106]
C000177075 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [106]
C000177075 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [106]
C000177075 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [106]
C000177075 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [106]
C000177075 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [106]
C000177075 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [106]
C000177075 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [106]
C000177075 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [106]
C000177075 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [106]
C000177075 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [106]
C000177075 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [106]
C000177075 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [106]
C000177075 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000177075 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.90%
C000177075 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000177069 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.20% [107]
C000177069 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 61.00% [107]
C000177069 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.20% [107]
C000177069 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [107]
C000177069 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [107]
C000177069 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [108]
C000177069 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [108]
C000177069 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [108]
C000177069 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [108]
C000177069 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [108]
C000177069 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [108]
C000177069 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [108]
C000177069 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [108]
C000177069 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [108]
C000177069 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [108]
C000177069 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [108]
C000177069 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 53.60% [108]
C000177069 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [108]
C000177069 [Member] | Multi National [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [108]
C000177069 [Member] | Foreign Government Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [108]
C000177069 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000177069 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000177069 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000177069 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000177069 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 53.60%
C000177069 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.00%
C000177069 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000177070 [Member] | Baa [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.20% [109]
C000177070 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 61.00% [109]
C000177070 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.20% [109]
C000177070 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [109]
C000177070 [Member] | Ba [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [109]
C000177070 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [110]
C000177070 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [110]
C000177070 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [110]
C000177070 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [110]
C000177070 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [110]
C000177070 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [110]
C000177070 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [110]
C000177070 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [110]
C000177070 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [110]
C000177070 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [110]
C000177070 [Member] | Unaffiliated Investment Companies Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [110]
C000177070 [Member] | US Government Corporations and Agencies Securities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 53.60% [110]
C000177070 [Member] | Pipelines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [110]
C000177070 [Member] | Multi National [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [110]
C000177070 [Member] | Foreign Government Obligations Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [110]
C000177070 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000177070 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000177070 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000177070 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000177070 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 53.60%
C000177070 [Member] | Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.00%
C000177070 [Member] | Municipal Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000177081 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177081 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.30%
C000177081 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
C000177081 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000177082 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000177082 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.30%
C000177082 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
C000177082 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000115991 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
C000115991 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000115991 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.60%
C000115991 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000115991 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
C000115991 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000115991 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000115991 [Member] | International Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000021977 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [111]
C000021977 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [111]
C000021977 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80% [111]
C000021977 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60% [111]
C000021977 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [111]
C000021977 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [111]
C000021977 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [111]
C000021977 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [111]
C000021977 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [111]
C000021977 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [111]
C000021977 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [111]
C000021977 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [111]
C000021977 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [111]
C000021977 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [111]
C000021977 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [111]
C000021977 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000021977 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021977 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000169132 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
C000169132 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000169132 [Member] | Domestic Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.60%
C000169132 [Member] | International Equity Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000169132 [Member] | Domestic Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
C000169132 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000169132 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000169132 [Member] | International Fixed Income Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000021975 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [112]
C000021975 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [112]
C000021975 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80% [112]
C000021975 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60% [112]
C000021975 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [112]
C000021975 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [112]
C000021975 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [112]
C000021975 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [112]
C000021975 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [112]
C000021975 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [112]
C000021975 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [112]
C000021975 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [112]
C000021975 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [112]
C000021975 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [112]
C000021975 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [112]
C000021975 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000021975 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021975 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000021976 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [113]
C000021976 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [113]
C000021976 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80% [113]
C000021976 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60% [113]
C000021976 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [113]
C000021976 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [113]
C000021976 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [113]
C000021976 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [113]
C000021976 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [113]
C000021976 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [113]
C000021976 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [113]
C000021976 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [113]
C000021976 [Member] | Electrical Components And Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [113]
C000021976 [Member] | Cosmetics Personal Care [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [113]
C000021976 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [113]
C000021976 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000021976 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000021976 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000021965 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [114]
C000021965 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.50% [114]
C000021965 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [114]
C000021965 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [114]
C000021965 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [114]
C000021965 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [114]
C000021965 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [114]
C000021965 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [114]
C000021965 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [114]
C000021965 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [114]
C000021965 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [114]
C000021965 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [114]
C000021965 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [114]
C000021965 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [114]
C000021965 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [114]
C000021965 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000021965 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.80%
C000021965 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000021965 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000021964 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [115]
C000021964 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.50% [115]
C000021964 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [115]
C000021964 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [115]
C000021964 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [115]
C000021964 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [115]
C000021964 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [115]
C000021964 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [115]
C000021964 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [115]
C000021964 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [115]
C000021964 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [115]
C000021964 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [115]
C000021964 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [115]
C000021964 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [115]
C000021964 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [115]
C000021964 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000021964 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.80%
C000021964 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000021964 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000021963 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [116]
C000021963 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.50% [116]
C000021963 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [116]
C000021963 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [116]
C000021963 [Member] | Food [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [116]
C000021963 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [116]
C000021963 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [116]
C000021963 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [116]
C000021963 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [116]
C000021963 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [116]
C000021963 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [116]
C000021963 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [116]
C000021963 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [116]
C000021963 [Member] | Media [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [116]
C000021963 [Member] | Machinery Construction And Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [116]
C000021963 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000021963 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.80%
C000021963 [Member] | Unaffiliated Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000021963 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000021956 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [117]
C000021956 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40% [117]
C000021956 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40% [117]
C000021956 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [117]
C000021956 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [117]
C000021956 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [117]
C000021956 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [117]
C000021956 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [117]
C000021956 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [117]
C000021956 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [117]
C000021956 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [117]
C000021956 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [117]
C000021956 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [117]
C000021956 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [117]
C000021956 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [117]
C000021956 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000021956 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000021956 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000183180 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [118]
C000183180 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40% [118]
C000183180 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40% [118]
C000183180 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [118]
C000183180 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40% [118]
C000183180 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [118]
C000183180 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [118]
C000183180 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [118]
C000183180 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [118]
C000183180 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [118]
C000183180 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [118]
C000183180 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [118]
C000183180 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [118]
C000183180 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [118]
C000183180 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [118]
C000183180 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000183180 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.70%
C000183180 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000022000 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [119]
C000022000 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [119]
C000022000 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [119]
C000022000 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [119]
C000022000 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [119]
C000022000 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [119]
C000022000 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [119]
C000022000 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [119]
C000022000 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [119]
C000022000 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [119]
C000022000 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [119]
C000022000 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [119]
C000022000 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [119]
C000022000 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [119]
C000022000 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [119]
C000022000 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000022000 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.30%
C000021999 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [120]
C000021999 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [120]
C000021999 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [120]
C000021999 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [120]
C000021999 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [120]
C000021999 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [120]
C000021999 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [120]
C000021999 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [120]
C000021999 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [120]
C000021999 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [120]
C000021999 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [120]
C000021999 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [120]
C000021999 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [120]
C000021999 [Member] | Miscellaneous Manufacturing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [120]
C000021999 [Member] | Engineering And Construction [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [120]
C000021999 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000021999 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.30%
C000021990 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [121]
C000021990 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.20% [121]
C000021990 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [121]
C000021990 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [121]
C000021990 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50% [121]
C000021990 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [121]
C000021990 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [121]
C000021990 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [121]
C000021990 [Member] | Commercial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [121]
C000021990 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60% [121]
C000021990 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [121]
C000021990 [Member] | Iron Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [121]
C000021990 [Member] | Electronics [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [121]
C000021990 [Member] | Lodging [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [121]
C000021990 [Member] | Metal Fabricate Hardware [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [121]
C000021990 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000021990 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.90%
C000021990 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000021968 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [122]
C000021968 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [122]
C000021968 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [122]
C000021968 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [122]
C000021968 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [122]
C000021968 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [122]
C000021968 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [122]
C000021968 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [122]
C000021968 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [122]
C000021968 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [122]
C000021968 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [122]
C000021968 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [122]
C000021968 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [122]
C000021968 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [122]
C000021968 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [122]
C000021968 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000021968 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000021968 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021967 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [123]
C000021967 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [123]
C000021967 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [123]
C000021967 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [123]
C000021967 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [123]
C000021967 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [123]
C000021967 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [123]
C000021967 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [123]
C000021967 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [123]
C000021967 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [123]
C000021967 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [123]
C000021967 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [123]
C000021967 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [123]
C000021967 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [123]
C000021967 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [123]
C000021967 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000021967 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000021967 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021966 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [124]
C000021966 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [124]
C000021966 [Member] | Internet [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [124]
C000021966 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [124]
C000021966 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [124]
C000021966 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [124]
C000021966 [Member] | Healthcare Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [124]
C000021966 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [124]
C000021966 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [124]
C000021966 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [124]
C000021966 [Member] | Auto Manufacturers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30% [124]
C000021966 [Member] | Telecommunications [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80% [124]
C000021966 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10% [124]
C000021966 [Member] | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [124]
C000021966 [Member] | Building Materials [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [124]
C000021966 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.00%)
C000021966 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000021966 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000021957 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [125]
C000021957 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [125]
C000021957 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [125]
C000021957 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [125]
C000021957 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70% [125]
C000021957 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50% [125]
C000021957 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [125]
C000021957 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [125]
C000021957 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [125]
C000021957 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [125]
C000021957 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [125]
C000021957 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [125]
C000021957 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [125]
C000021957 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [125]
C000021957 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [125]
C000021957 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021957 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000021957 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000021958 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [126]
C000021958 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [126]
C000021958 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [126]
C000021958 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [126]
C000021958 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70% [126]
C000021958 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50% [126]
C000021958 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [126]
C000021958 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [126]
C000021958 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [126]
C000021958 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [126]
C000021958 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [126]
C000021958 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [126]
C000021958 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [126]
C000021958 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [126]
C000021958 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [126]
C000021958 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021958 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000021958 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000021959 [Member] | Oil and Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [127]
C000021959 [Member] | Semiconductors [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [127]
C000021959 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [127]
C000021959 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [127]
C000021959 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70% [127]
C000021959 [Member] | Diversified Financial Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50% [127]
C000021959 [Member] | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [127]
C000021959 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [127]
C000021959 [Member] | Retail Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [127]
C000021959 [Member] | Electric [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [127]
C000021959 [Member] | REITS [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [127]
C000021959 [Member] | Aerospace Defense [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [127]
C000021959 [Member] | Healthcare Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [127]
C000021959 [Member] | Machinery Diversified [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [127]
C000021959 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [127]
C000021959 [Member] | Other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000021959 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000021959 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
[1] Percentages exclude derivatives (other than purchased options), if any.
[2] Percentages exclude derivatives (other than purchased options), if any.
[3] Percentages exclude derivatives (other than purchased options), if any.
[4] Percentages exclude derivatives (other than purchased options), if any.
[5] Percentages exclude derivatives (other than purchased options), if any.
[6] Percentages exclude derivatives (other than purchased options), if any.
[7] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[8] Percentages exclude derivatives (other than purchased options), if any.
[9] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[10] Percentages exclude derivatives (other than purchased options), if any.
[11] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[12] Percentages exclude derivatives (other than purchased options), if any.
[13] Percentages exclude derivatives (other than purchased options), if any.
[14] Percentages exclude derivatives (other than purchased options), if any.
[15] Percentages exclude derivatives (other than purchased options), if any.
[16] Percentages exclude derivatives (other than purchased options), if any.
[17] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[18] Percentages exclude derivatives (other than purchased options), if any.
[19] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[20] Percentages exclude derivatives (other than purchased options), if any.
[21] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[22] Percentages exclude derivatives (other than purchased options), if any.
[23] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[24] Percentages exclude derivatives (other than purchased options), if any.
[25] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[26] Percentages exclude derivatives (other than purchased options), if any.
[27] Percentages exclude derivatives (other than purchased options), if any.
[28] Percentages exclude derivatives (other than purchased options), if any.
[29] Percentages exclude derivatives (other than purchased options), if any.
[30] Percentages exclude derivatives (other than purchased options), if any.
[31] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[32] Percentages exclude derivatives (other than purchased options), if any.
[33] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[34] Percentages exclude derivatives (other than purchased options), if any.
[35] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[36] Percentages exclude derivatives (other than purchased options), if any.
[37] Percentages exclude derivatives (other than purchased options), if any.
[38] Percentages exclude derivatives (other than purchased options), if any.
[39] Percentages exclude derivatives (other than purchased options), if any.
[40] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[41] Percentages exclude derivatives (other than purchased options), if any.
[42] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[43] Percentages exclude derivatives (other than purchased options), if any.
[44] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[45] Percentages exclude derivatives (other than purchased options), if any.
[46] Percentages exclude derivatives (other than purchased options), if any.
[47] Percentages exclude derivatives (other than purchased options), if any.
[48] Percentages exclude derivatives (other than purchased options), if any.
[49] Percentages exclude derivatives (other than purchased options), if any.
[50] Percentages exclude derivatives (other than purchased options), if any.
[51] Percentages exclude derivatives (other than purchased options), if any.
[52] Percentages exclude derivatives (other than purchased options), if any.
[53] Percentages exclude derivatives (other than purchased options), if any.
[54] Percentages exclude derivatives (other than purchased options), if any.
[55] Percentages exclude derivatives (other than purchased options), if any.
[56] Percentages exclude derivatives (other than purchased options), if any.
[57] Percentages exclude derivatives (other than purchased options), if any.
[58] Percentages exclude derivatives (other than purchased options), if any.
[59] Percentages exclude derivatives (other than purchased options), if any.
[60] Percentages exclude derivatives (other than purchased options), if any.
[61] Percentages exclude derivatives (other than purchased options), if any.
[62] Percentages exclude derivatives (other than purchased options), if any.
[63] Percentages exclude derivatives (other than purchased options), if any.
[64] Percentages exclude derivatives (other than purchased options), if any.
[65] Percentages exclude derivatives (other than purchased options), if any.
[66] Percentages exclude derivatives (other than purchased options), if any.
[67] Percentages exclude derivatives (other than purchased options), if any.
[68] Percentages exclude derivatives (other than purchased options), if any.
[69] Percentages exclude derivatives (other than purchased options), if any.
[70] Percentages exclude derivatives (other than purchased options), if any.
[71] Percentages exclude derivatives (other than purchased options), if any.
[72] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[73] Percentages exclude derivatives (other than purchased options), if any.
[74] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[75] Percentages exclude derivatives (other than purchased options), if any.
[76] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[77] Percentages exclude derivatives (other than purchased options), if any.
[78] Percentages exclude derivatives (other than purchased options), if any.
[79] Percentages exclude derivatives (other than purchased options), if any.
[80] Percentages exclude derivatives (other than purchased options), if any.
[81] Percentages exclude derivatives (other than purchased options), if any.
[82] Percentages exclude derivatives (other than purchased options), if any.
[83] Percentages exclude derivatives (other than purchased options), if any.
[84] Percentages exclude derivatives (other than purchased options), if any.
[85] Percentages exclude derivatives (other than purchased options), if any.
[86] Percentages exclude derivatives (other than purchased options), if any.
[87] Percentages exclude derivatives (other than purchased options), if any.
[88] Percentages exclude derivatives (other than purchased options), if any.
[89] Percentages exclude derivatives (other than purchased options), if any.
[90] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[91] Percentages exclude derivatives (other than purchased options), if any.
[92] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[93] Percentages exclude derivatives (other than purchased options), if any.
[94] Percentages exclude derivatives (other than purchased options), if any.
[95] Percentages exclude derivatives (other than purchased options), if any.
[96] Percentages exclude derivatives (other than purchased options), if any.
[97] Percentages exclude derivatives (other than purchased options), if any.
[98] Percentages exclude derivatives (other than purchased options), if any.
[99] Percentages exclude derivatives (other than purchased options), if any.
[100] Percentages exclude derivatives (other than purchased options), if any.
[101] Percentages exclude derivatives (other than purchased options), if any.
[102] Percentages exclude derivatives (other than purchased options), if any.
[103] Percentages exclude derivatives (other than purchased options), if any.
[104] Percentages exclude derivatives (other than purchased options), if any.
[105] Percentages exclude derivatives (other than purchased options), if any.
[106] Percentages exclude derivatives (other than purchased options), if any.
[107] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[108] Percentages exclude derivatives (other than purchased options), if any.
[109] Credit quality ratings shown above reflect the rating assigned by Moody's Investors Service, Inc. Where Moody's ratings are not available, we have used Standard & Poor's ratings.  Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. Percentages exclude short-term securities.
[110] Percentages exclude derivatives (other than purchased options), if any.
[111] Percentages exclude derivatives (other than purchased options), if any.
[112] Percentages exclude derivatives (other than purchased options), if any.
[113] Percentages exclude derivatives (other than purchased options), if any.
[114] Percentages exclude derivatives (other than purchased options), if any.
[115] Percentages exclude derivatives (other than purchased options), if any.
[116] Percentages exclude derivatives (other than purchased options), if any.
[117] Percentages exclude derivatives (other than purchased options), if any.
[118] Percentages exclude derivatives (other than purchased options), if any.
[119] Percentages exclude derivatives (other than purchased options), if any.
[120] Percentages exclude derivatives (other than purchased options), if any.
[121] Percentages exclude derivatives (other than purchased options), if any.
[122] Percentages exclude derivatives (other than purchased options), if any.
[123] Percentages exclude derivatives (other than purchased options), if any.
[124] Percentages exclude derivatives (other than purchased options), if any.
[125] Percentages exclude derivatives (other than purchased options), if any.
[126] Percentages exclude derivatives (other than purchased options), if any.
[127] Percentages exclude derivatives (other than purchased options), if any.