v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
C000028838 | BJ's Wholesale Club Holdings, Inc. - FR_05550J101  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028838 | Encompass Health Corp. - FR_29261A100  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000028838 | TXNM Energy, Inc. - FR_69349H107  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028838 | Jones Lang LaSalle, Inc. - FR_48020Q107  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028838 | Hanover Insurance Group, Inc. (The) - FR_410867105  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028838 | Nexstar Media Group, Inc. - FR_65336K103  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028838 | IDACORP, Inc. - FR_451107106  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028838 | Tenet Healthcare Corp. - FR_88033G407  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028838 | Pentair PLC - FR_G7S00T104  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028838 | RPM International, Inc. - FR_749685103  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000028838 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 20.10%
C000028838 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
C000028838 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000028838 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000028838 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000028838 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000028838 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000028838 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000028838 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000028838 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000028838 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028838 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000028838 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.80%)
C000028839 | BJ's Wholesale Club Holdings, Inc. - FR_05550J101  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028839 | Encompass Health Corp. - FR_29261A100  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000028839 | TXNM Energy, Inc. - FR_69349H107  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028839 | Jones Lang LaSalle, Inc. - FR_48020Q107  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028839 | Hanover Insurance Group, Inc. (The) - FR_410867105  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028839 | Nexstar Media Group, Inc. - FR_65336K103  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028839 | IDACORP, Inc. - FR_451107106  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028839 | Tenet Healthcare Corp. - FR_88033G407  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028839 | Pentair PLC - FR_G7S00T104  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028839 | RPM International, Inc. - FR_749685103  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000028839 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 20.10%
C000028839 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
C000028839 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000028839 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000028839 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000028839 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000028839 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000028839 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000028839 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000028839 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000028839 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028839 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000028839 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.80%)
C000098721 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000098721 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000098721 | Apple, Inc. - FR_037833100  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000098721 | U.S. Treasury Notes, 2.000 - FR_912828U24  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000098721 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000098721 | U.S. Treasury Notes, 2.375 - FR_912828X88  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000098721 | U.S. Treasury Notes, 2.250 - FR_9128283F5  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000098721 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000098721 | U.S. Treasury Notes, 1.625 - FR_91282CCB5  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000098721 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000098721 | Security TypeCommon Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 63.70%
C000098721 | Security TypeGovernments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 32.40%
C000098721 | Security TypeAgencies  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000098721 | Security TypePurchased Options - Puts  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000098721 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000098721 | Security Type Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000098722 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000098722 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000098722 | Apple, Inc. - FR_037833100  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000098722 | U.S. Treasury Notes, 2.000 - FR_912828U24  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000098722 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000098722 | U.S. Treasury Notes, 2.375 - FR_912828X88  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000098722 | U.S. Treasury Notes, 2.250 - FR_9128283F5  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000098722 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000098722 | U.S. Treasury Notes, 1.625 - FR_91282CCB5  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000098722 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000098722 | Security TypeCommon Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 63.70%
C000098722 | Security TypeGovernments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 32.40%
C000098722 | Security TypeAgencies  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000098722 | Security TypePurchased Options - Puts  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000098722 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000098722 | Security Type Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000154814 | Country SummaryUnited States  
Holdings [Line Items]  
Percent of Net Asset Value 55.30%
C000154814 | Country SummaryJapan  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000154814 | Country SummaryUnited Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000154814 | Country SummaryGermany  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000154814 | Country SummaryFrance  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000154814 | Country SummarySwitzerland  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000154814 | Country SummaryAustralia  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000154814 | Country SummaryNetherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000154814 | Country SummarySpain  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000154814 | Country SummaryItaly  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000154814 | Country SummarySweden  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000154814 | Country SummaryDenmark  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000154814 | Country SummaryHong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000154814 | Country SummarySingapore  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000154814 | Country SummaryIreland  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000154814 | Country Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 21.20%
C000154814 | 13466926  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000154814 | Security TypeCommon Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 73.50%
C000154814 | Security TypeGovernments - Treasuries  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000154814 | Security TypePurchased Options - Puts  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000154814 | Others  
Holdings [Line Items]  
Percent of Net Asset Value 21.20%
C000154814 | Security Type Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028862 | JPMorgan Chase & Co. - FR_46625H100  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000028862 | Berkshire Hathaway, Inc., Class B - FR_084670702  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000028862 | Philip Morris International, Inc. - FR_718172109  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000028862 | Johnson & Johnson - FR_478160104  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028862 | Walmart, Inc. - FR_931142103  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028862 | RTX Corp. - FR_75513E101  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000028862 | EOG Resources, Inc. - FR_26875P101  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028862 | Texas Instruments, Inc. - FR_882508104  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028862 | S&P Global, Inc. - FR_78409V104  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028862 | Elevance Health, Inc. - FR_036752103  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028862 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 16.70%
C000028862 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
C000028862 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000028862 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000028862 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028862 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
C000028862 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000028862 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028862 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000028862 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000028862 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000028862 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000028863 | JPMorgan Chase & Co. - FR_46625H100  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000028863 | Berkshire Hathaway, Inc., Class B - FR_084670702  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000028863 | Philip Morris International, Inc. - FR_718172109  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000028863 | Johnson & Johnson - FR_478160104  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028863 | Walmart, Inc. - FR_931142103  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028863 | RTX Corp. - FR_75513E101  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000028863 | EOG Resources, Inc. - FR_26875P101  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028863 | Texas Instruments, Inc. - FR_882508104  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028863 | S&P Global, Inc. - FR_78409V104  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028863 | Elevance Health, Inc. - FR_036752103  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028863 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 16.70%
C000028863 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
C000028863 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000028863 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000028863 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028863 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
C000028863 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000028863 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028863 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000028863 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000028863 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000028863 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000028852 | iShares Core S&P 500 ETF - FR_464287200  
Holdings [Line Items]  
Percent of Net Asset Value 33.50%
C000028852 | iShares Core U.S. Aggregate Bond ETF - FR_464287226  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
C000028852 | Vanguard Total Bond Market ETF - FR_921937835  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
C000028852 | iShares Core MSCI EAFE ETF - FR_46432F842  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
C000028852 | iShares Core MSCI Emerging Markets ETF - FR_46434G103  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000028852 | U.S. Treasury Inflation Index, 0.125 - FR_91282CDX6  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000028852 | Vanguard Mid-Cap ETF - FR_922908629  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028852 | Vanguard Real Estate ETF - FR_922908553  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028852 | S&P 500 Index, 6100.000 - FR_ADI2SDGG8  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000028852 | S&P 500 Index, 6000.000 - FR_ADI2HRKD1  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000028852 | 13468419  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000028852 | 13468397  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000028852 | AssetInvestment Companies  
Holdings [Line Items]  
Percent of Net Asset Value 87.80%
C000028852 | AssetInflation-Linked Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000028852 | AssetPurchased Options - Calls  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028852 | AssetPurchased Options - Puts  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028853 | iShares Core S&P 500 ETF - FR_464287200  
Holdings [Line Items]  
Percent of Net Asset Value 33.50%
C000028853 | iShares Core U.S. Aggregate Bond ETF - FR_464287226  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
C000028853 | Vanguard Total Bond Market ETF - FR_921937835  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
C000028853 | iShares Core MSCI EAFE ETF - FR_46432F842  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
C000028853 | iShares Core MSCI Emerging Markets ETF - FR_46434G103  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000028853 | U.S. Treasury Inflation Index, 0.125 - FR_91282CDX6  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000028853 | Vanguard Mid-Cap ETF - FR_922908629  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028853 | Vanguard Real Estate ETF - FR_922908553  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028853 | S&P 500 Index, 6100.000 - FR_ADI2SDGG8  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000028853 | S&P 500 Index, 6000.000 - FR_ADI2HRKD1  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000028853 | 13468419  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000028853 | 13468397  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000028853 | AssetInvestment Companies  
Holdings [Line Items]  
Percent of Net Asset Value 87.80%
C000028853 | AssetInflation-Linked Securities  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000028853 | AssetPurchased Options - Calls  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028853 | AssetPurchased Options - Puts  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028828 | Shell PLC - FR_BP6MXT901  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028828 | Roche Holding AG - FR_711038901  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000028828 | Airbus SE - FR_401225909  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028828 | AXA SA - FR_708842901  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028828 | Tokyo Electron Ltd. - FR_689567006  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028828 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_688910900  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000028828 | Melrose Industries PLC - FR_BNGDN8902  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028828 | Industria de Diseno Textil SA - FR_ACI08XL68  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028828 | Resona Holdings, Inc. - FR_642155907  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028828 | Haleon PLC - FR_BMX86B908  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028828 | Country SummaryUnited States  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000028828 | Country SummaryJapan  
Holdings [Line Items]  
Percent of Net Asset Value 24.50%
C000028828 | Country SummaryUnited Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
C000028828 | Country SummaryGermany  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000028828 | Country SummaryFrance  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000028828 | Country SummarySwitzerland  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000028828 | Country SummaryNetherlands  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000028828 | Country SummarySpain  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000028828 | Country SummaryItaly  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000028828 | Country SummaryDenmark  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000028828 | Country SummaryHong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028828 | Country Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028828 | Country SummaryTaiwan  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000028828 | Country SummarySouth Korea  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028828 | Country SummaryPortugal  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028828 | Country SummaryChile  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000028828 | 13467678  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000028828 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000028828 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
C000028828 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000028828 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000028828 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028828 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000028828 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028828 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
C000028828 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028828 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000028828 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000028828 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028828 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000028829 | Shell PLC - FR_BP6MXT901  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028829 | Roche Holding AG - FR_711038901  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000028829 | Airbus SE - FR_401225909  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028829 | AXA SA - FR_708842901  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028829 | Tokyo Electron Ltd. - FR_689567006  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028829 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_688910900  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000028829 | Melrose Industries PLC - FR_BNGDN8902  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028829 | Industria de Diseno Textil SA - FR_ACI08XL68  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028829 | Resona Holdings, Inc. - FR_642155907  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028829 | Haleon PLC - FR_BMX86B908  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028829 | Country SummaryUnited States  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000028829 | Country SummaryJapan  
Holdings [Line Items]  
Percent of Net Asset Value 24.50%
C000028829 | Country SummaryUnited Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
C000028829 | Country SummaryGermany  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000028829 | Country SummaryFrance  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000028829 | Country SummarySwitzerland  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000028829 | Country SummaryNetherlands  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000028829 | Country SummarySpain  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000028829 | Country SummaryItaly  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000028829 | Country SummaryDenmark  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000028829 | Country SummaryHong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028829 | Country Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028829 | Country SummaryTaiwan  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000028829 | Country SummarySouth Korea  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028829 | Country SummaryPortugal  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028829 | Country SummaryChile  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000028829 | 13467678  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000028829 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000028829 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
C000028829 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000028829 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000028829 | SectorReal Estate  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028829 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000028829 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028829 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
C000028829 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028829 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000028829 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000028829 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028829 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000028830 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
C000028830 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000028830 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000028830 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000028830 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000028830 | Netflix, Inc. - FR_64110L106  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000028830 | Alphabet, Inc., Class C - FR_02079K107  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028830 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000028830 | Eli Lilly & Co. - FR_532457108  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028830 | Costco Wholesale Corp. - FR_22160K105  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028830 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
C000028830 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000028830 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 37.70%
C000028830 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000028830 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
C000028830 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000028830 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000028830 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
C000028830 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028830 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (2.00%)
C000028831 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
C000028831 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000028831 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000028831 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000028831 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000028831 | Netflix, Inc. - FR_64110L106  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000028831 | Alphabet, Inc., Class C - FR_02079K107  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028831 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000028831 | Eli Lilly & Co. - FR_532457108  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028831 | Costco Wholesale Corp. - FR_22160K105  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028831 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
C000028831 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000028831 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 37.70%
C000028831 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000028831 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
C000028831 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000028831 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000028831 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
C000028831 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028831 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (2.00%)
C000028836 | Credo Technology Group Holding Ltd. - FR_G25457105  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028836 | AeroVironment, Inc. - FR_008073108  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028836 | SPX Technologies, Inc. - FR_78473E103  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028836 | Construction Partners, Inc., Class A - FR_21044C107  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028836 | Alkami Technology, Inc. - FR_01644J108  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028836 | Casella Waste Systems, Inc., Class A - FR_147448104  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028836 | Primoris Services Corp. - FR_74164F103  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028836 | SiTime Corp. - FR_82982T106  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028836 | Ollie's Bargain Outlet Holdings, Inc. - FR_681116109  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028836 | Celsius Holdings, Inc. - FR_15118V207  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028836 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 25.30%
C000028836 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
C000028836 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 23.40%
C000028836 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
C000028836 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000028836 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028836 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028836 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000028836 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028836 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (2.30%)
C000028837 | Credo Technology Group Holding Ltd. - FR_G25457105  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028837 | AeroVironment, Inc. - FR_008073108  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000028837 | SPX Technologies, Inc. - FR_78473E103  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028837 | Construction Partners, Inc., Class A - FR_21044C107  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028837 | Alkami Technology, Inc. - FR_01644J108  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028837 | Casella Waste Systems, Inc., Class A - FR_147448104  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028837 | Primoris Services Corp. - FR_74164F103  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000028837 | SiTime Corp. - FR_82982T106  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028837 | Ollie's Bargain Outlet Holdings, Inc. - FR_681116109  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028837 | Celsius Holdings, Inc. - FR_15118V207  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000028837 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 25.30%
C000028837 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
C000028837 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 23.40%
C000028837 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
C000028837 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000028837 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028837 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028837 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000028837 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028837 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (2.30%)
C000028860 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000028860 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000028860 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_688910900  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028860 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028860 | Flex Ltd. - FR_Y2573F102  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028860 | London Stock Exchange Group PLC - FR_B0SWJX907  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028860 | Cia de Saneamento Basico do Estado de Sao Paulo SABESP - FR_B1YCHL900  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028860 | Rockwell Automation, Inc. - FR_773903109  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028860 | AIA Group Ltd. - FR_B4TX8S909  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028860 | Cameco Corp. - FR_13321L108  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028860 | Country SummaryUnited States  
Holdings [Line Items]  
Percent of Net Asset Value 62.30%
C000028860 | Country SummaryJapan  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028860 | Country SummaryUnited Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000028860 | Country SummaryGermany  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028860 | Country SummaryFrance  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000028860 | Country SummarySwitzerland  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028860 | Country SummaryItaly  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028860 | Country SummaryHong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028860 | Country SummaryIreland  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000028860 | Country Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028860 | Country SummaryTaiwan  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028860 | Country SummaryBrazil  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000028860 | Country SummaryCanada  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028860 | Country SummaryChina  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028860 | Country SummaryIndia  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028860 | 13467896  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
C000028860 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 17.00%
C000028860 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
C000028860 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 35.60%
C000028860 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000028860 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
C000028860 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000028860 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000028860 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028860 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028860 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
C000028861 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000028861 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000028861 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_688910900  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028861 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028861 | Flex Ltd. - FR_Y2573F102  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000028861 | London Stock Exchange Group PLC - FR_B0SWJX907  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028861 | Cia de Saneamento Basico do Estado de Sao Paulo SABESP - FR_B1YCHL900  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028861 | Rockwell Automation, Inc. - FR_773903109  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028861 | AIA Group Ltd. - FR_B4TX8S909  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028861 | Cameco Corp. - FR_13321L108  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028861 | Country SummaryUnited States  
Holdings [Line Items]  
Percent of Net Asset Value 62.30%
C000028861 | Country SummaryJapan  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028861 | Country SummaryUnited Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000028861 | Country SummaryGermany  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028861 | Country SummaryFrance  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000028861 | Country SummarySwitzerland  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000028861 | Country SummaryItaly  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000028861 | Country SummaryHong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028861 | Country SummaryIreland  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000028861 | Country Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028861 | Country SummaryTaiwan  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000028861 | Country SummaryBrazil  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000028861 | Country SummaryCanada  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028861 | Country SummaryChina  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000028861 | Country SummaryIndia  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000028861 | 13467896  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
C000028861 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 17.00%
C000028861 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
C000028861 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 35.60%
C000028861 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000028861 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
C000028861 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000028861 | SectorUtilities  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000028861 | SectorEnergy  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000028861 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000028861 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)