v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
C000007612 [Member] | The Hanover Insurance Group Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [1]
C000007612 [Member] | MKS Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [1]
C000007612 [Member] | ITT Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [1]
C000007612 [Member] | Semtech Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [1]
C000007612 [Member] | Dycom Industries Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [1]
C000007612 [Member] | TechnipFMC PLC [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [1]
C000007612 [Member] | Everpure Inc Cl A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [1]
C000007612 [Member] | First Horizon Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [1]
C000007612 [Member] | ATI Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [1]
C000007612 [Member] | Sterling Infrastructure Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [1]
C000007612 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000007612 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000007612 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
C000007612 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
C000007612 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000007612 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000007612 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000007612 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000007612 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000007612 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.90%
C000007612 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000007612 [Member] | Net Other Assets and Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000007611 [Member] | The Hanover Insurance Group Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [2]
C000007611 [Member] | MKS Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [2]
C000007611 [Member] | ITT Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [2]
C000007611 [Member] | Semtech Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [2]
C000007611 [Member] | Dycom Industries Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [2]
C000007611 [Member] | TechnipFMC PLC [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [2]
C000007611 [Member] | Everpure Inc Cl A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [2]
C000007611 [Member] | First Horizon Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10% [2]
C000007611 [Member] | ATI Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [2]
C000007611 [Member] | Sterling Infrastructure Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [2]
C000007611 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000007611 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
C000007611 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
C000007611 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
C000007611 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000007611 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000007611 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000007611 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000007611 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
C000007611 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.90%
C000007611 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000007611 [Member] | Net Other Assets and Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000007613 [Member] | iShares Core S And P Small Cap ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [3]
C000007613 [Member] | FormFactor Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [3]
C000007613 [Member] | Viasat Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [3]
C000007613 [Member] | Molina Healthcare Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [3]
C000007613 [Member] | Argan Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [3]
C000007613 [Member] | BrightSpring Health Services Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [3]
C000007613 [Member] | Element Solutions Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [3]
C000007613 [Member] | Krystal Biotech Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [3]
C000007613 [Member] | ESCO Technologies Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [3]
C000007613 [Member] | MaxLinear Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [3]
C000007613 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000007613 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000007613 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000007613 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90%
C000007613 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000007613 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
C000007613 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000007613 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000007613 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
C000007613 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000007613 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000007613 [Member] | Net Other Assets and Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.50%)
C000007613 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000007615 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [4]
C000007615 [Member] | Texas Instruments Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [4]
C000007615 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [4]
C000007615 [Member] | Advanced Micro Devices Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [4]
C000007615 [Member] | Lam Research Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [4]
C000007615 [Member] | Applied Materials Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [4]
C000007615 [Member] | Intel Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [4]
C000007615 [Member] | Marvell Technology Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [4]
C000007615 [Member] | Taiwan Semiconductor Manufacturing Co Ltd [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [4]
C000007615 [Member] | Micron Technology Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [4]
C000007615 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 80.80%
C000007615 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000007615 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000007615 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000007615 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [5]
C000007615 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000007615 [Member] | Net Other Assets and Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.20%)
C000007615 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000007614 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [6]
C000007614 [Member] | Texas Instruments Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [6]
C000007614 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [6]
C000007614 [Member] | Advanced Micro Devices Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50% [6]
C000007614 [Member] | Lam Research Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [6]
C000007614 [Member] | Applied Materials Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [6]
C000007614 [Member] | Intel Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40% [6]
C000007614 [Member] | Marvell Technology Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [6]
C000007614 [Member] | Taiwan Semiconductor Manufacturing Co Ltd [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [6]
C000007614 [Member] | Micron Technology Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [6]
C000007614 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 80.80%
C000007614 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000007614 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000007614 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000007614 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [7]
C000007614 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000007614 [Member] | Net Other Assets and Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.20%)
C000007614 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
[1] Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
[2] Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
[3] Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
[4] Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
[5] Amount represents less than .1%.
[6] Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
[7] Amount represents less than .1%.