v3.26.1
Shareholder Report, Holdings (Details)
Jan. 31, 2026
C000028342 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
C000028342 | Alphabet, Inc., Class C - FR_02079K107  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000028342 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000028342 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000028342 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000028342 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000028342 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000028342 | Eli Lilly & Co. - FR_532457108  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028342 | Netflix, Inc. - FR_64110L106  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028342 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_874039100  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028342 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 37.40%
C000028342 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000028342 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000028342 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000028342 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000028342 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028342 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000028342 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028342 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028342 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000028338 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
C000028338 | Alphabet, Inc., Class C - FR_02079K107  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000028338 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000028338 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000028338 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000028338 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000028338 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000028338 | Eli Lilly & Co. - FR_532457108  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028338 | Netflix, Inc. - FR_64110L106  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028338 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_874039100  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028338 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 37.40%
C000028338 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000028338 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000028338 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000028338 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000028338 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028338 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000028338 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028338 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028338 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000028341 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
C000028341 | Alphabet, Inc., Class C - FR_02079K107  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000028341 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000028341 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000028341 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000028341 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000028341 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000028341 | Eli Lilly & Co. - FR_532457108  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028341 | Netflix, Inc. - FR_64110L106  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028341 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_874039100  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028341 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 37.40%
C000028341 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000028341 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000028341 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000028341 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000028341 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028341 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000028341 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028341 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028341 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000028345 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
C000028345 | Alphabet, Inc., Class C - FR_02079K107  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000028345 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000028345 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000028345 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000028345 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000028345 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000028345 | Eli Lilly & Co. - FR_532457108  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000028345 | Netflix, Inc. - FR_64110L106  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000028345 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_874039100  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000028345 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 37.40%
C000028345 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000028345 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000028345 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000028345 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000028345 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000028345 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000028345 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028345 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000028345 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000159956 | NVIDIA Corp. - FR_67066G104  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
C000159956 | Alphabet, Inc., Class C - FR_02079K107  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000159956 | Microsoft Corp. - FR_594918104  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
C000159956 | Amazon.com, Inc. - FR_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000159956 | Broadcom, Inc. - FR_11135F101  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000159956 | Meta Platforms, Inc., Class A - FR_30303M102  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000159956 | Visa, Inc., Class A - FR_92826C839  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000159956 | Eli Lilly & Co. - FR_532457108  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000159956 | Netflix, Inc. - FR_64110L106  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000159956 | Taiwan Semiconductor Manufacturing Co., Ltd. - FR_874039100  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000159956 | SectorInformation Technology  
Holdings [Line Items]  
Percent of Net Asset Value 37.40%
C000159956 | SectorCommunication Services  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000159956 | SectorConsumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000159956 | SectorHealth Care  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
C000159956 | SectorFinancials  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000159956 | SectorConsumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000159956 | SectorIndustrials  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000159956 | SectorMaterials  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000159956 | SectorShort-Term Investments  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000159956 | Sector Other Net Line  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)