Shareholder Report, Holdings (Details)	Mar. 31, 2026
C000007070 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000007070 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	12.80%
C000007070 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000007070 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	1.80%
C000007070 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	7.60%
C000007070 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	25.10%
C000007070 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	13.30%
C000007070 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	27.90%
C000007070 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	1.60%
C000007070 \| SectorReal Estate
Holdings [Line Items]
Percent of Net Asset Value	0.10%
C000007070 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000007070 \| Sector Other Net Line
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000007071 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000007071 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	12.80%
C000007071 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000007071 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	1.80%
C000007071 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	7.60%
C000007071 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	25.10%
C000007071 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	13.30%
C000007071 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	27.90%
C000007071 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	1.60%
C000007071 \| SectorReal Estate
Holdings [Line Items]
Percent of Net Asset Value	0.10%
C000007071 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000007071 \| Sector Other Net Line
Holdings [Line Items]
Percent of Net Asset Value	1.00%