v3.25.2
Shareholder Report, Holdings (Details)
May 31, 2025
C000102727 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000102727 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000102727 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000102727 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000102727 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000102727 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000102727 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000102727 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000102727 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000102727 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000102727 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000102727 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000102727 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000102727 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000102727 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000102727 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000102727 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000102727 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000102727 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000102727 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000102727 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000102727 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000102727 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006431 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006431 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006431 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006431 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006431 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006431 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006431 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006431 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006431 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006431 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006431 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006431 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006431 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006431 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006431 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006431 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006431 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006431 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006431 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006431 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006431 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006431 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006431 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006442 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006442 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006442 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006442 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006442 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006442 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006442 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006442 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006442 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006442 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006442 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006442 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006442 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006442 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006442 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006442 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006442 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006442 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006442 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006442 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006442 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006442 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006442 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006441 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006441 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006441 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006441 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006441 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006441 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006441 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006441 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006441 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006441 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006441 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006441 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006441 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006441 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006441 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006441 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006441 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006441 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006441 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006441 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006441 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006441 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006441 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006439 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006439 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006439 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006439 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006439 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006439 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006439 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006439 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006439 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006439 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006439 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006439 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006439 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006439 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006439 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006439 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006439 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006439 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006439 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006439 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006439 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006439 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006439 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006437 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006437 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006437 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006437 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006437 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006437 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006437 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006437 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006437 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006437 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006437 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006437 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006437 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006437 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006437 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006437 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006437 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006437 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006437 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006437 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006437 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006437 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006437 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006436 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006436 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006436 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006436 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006436 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006436 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006436 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006436 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006436 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006436 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006436 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006436 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006436 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006436 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006436 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006436 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006436 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006436 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006436 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006436 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006436 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006436 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006436 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006435 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006435 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006435 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006435 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006435 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006435 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006435 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006435 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006435 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006435 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006435 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006435 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006435 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006435 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006435 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006435 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006435 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006435 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006435 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006435 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006435 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006435 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006435 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000006430 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000006430 [Member] | Spotify Technology S A [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000006430 [Member] | Visa Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000006430 [Member] | Netflix Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000006430 [Member] | Mastercard Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000006430 [Member] | Alphabet Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70%
C000006430 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000006430 [Member] | Meta Platforms Inc A [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000006430 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000006430 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
C000006430 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000006430 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000006430 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.60%
C000006430 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
C000006430 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000006430 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.60%
C000006430 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.40%
C000006430 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000006430 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000006430 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
C000006430 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000006430 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.10%
C000006430 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.90%