v3.26.1
Shareholder Report, Holdings (Details)
May 31, 2026
C000213874 [Member] | Quanta Services Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [1]
C000213874 [Member] | Eli Lilly And Co [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [1]
C000213874 [Member] | Meta Platforms Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [1]
C000213874 [Member] | Datadog Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [1]
C000213874 [Member] | Alphabet Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [1]
C000213874 [Member] | Broadcom Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [1]
C000213874 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [1]
C000213874 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [1]
C000213874 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [1]
C000213874 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50% [1]
C000213874 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [2]
C000213874 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.70% [2]
C000213874 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30% [2]
C000213874 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [2]
C000213874 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [2]
C000213874 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00% [2]
C000213874 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [2]
C000213874 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [2]
C000213874 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [2]
C000213874 [Member] | Liabilities in Excess of Other Assets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%) [2]
C000213874 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [2]
C000006153 [Member] | Quanta Services Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [3]
C000006153 [Member] | Eli Lilly And Co [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [3]
C000006153 [Member] | Meta Platforms Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [3]
C000006153 [Member] | Datadog Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [3]
C000006153 [Member] | Alphabet Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [3]
C000006153 [Member] | Broadcom Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [3]
C000006153 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [3]
C000006153 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [3]
C000006153 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [3]
C000006153 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50% [3]
C000006153 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [4]
C000006153 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.70% [4]
C000006153 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30% [4]
C000006153 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [4]
C000006153 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [4]
C000006153 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00% [4]
C000006153 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [4]
C000006153 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [4]
C000006153 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [4]
C000006153 [Member] | Liabilities in Excess of Other Assets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%) [4]
C000006153 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [4]
C000006151 [Member] | Quanta Services Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [5]
C000006151 [Member] | Eli Lilly And Co [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [5]
C000006151 [Member] | Meta Platforms Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [5]
C000006151 [Member] | Datadog Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [5]
C000006151 [Member] | Alphabet Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [5]
C000006151 [Member] | Broadcom Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [5]
C000006151 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [5]
C000006151 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [5]
C000006151 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [5]
C000006151 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50% [5]
C000006151 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [6]
C000006151 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.70% [6]
C000006151 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30% [6]
C000006151 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [6]
C000006151 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [6]
C000006151 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00% [6]
C000006151 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [6]
C000006151 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [6]
C000006151 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [6]
C000006151 [Member] | Liabilities in Excess of Other Assets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%) [6]
C000006151 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [6]
C000006154 [Member] | Quanta Services Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [7]
C000006154 [Member] | Eli Lilly And Co [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [7]
C000006154 [Member] | Meta Platforms Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [7]
C000006154 [Member] | Datadog Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [7]
C000006154 [Member] | Alphabet Inc Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [7]
C000006154 [Member] | Broadcom Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [7]
C000006154 [Member] | Apple Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [7]
C000006154 [Member] | Microsoft Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [7]
C000006154 [Member] | Amazon com Inc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [7]
C000006154 [Member] | NVIDIA Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50% [7]
C000006154 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [8]
C000006154 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.70% [8]
C000006154 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30% [8]
C000006154 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [8]
C000006154 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [8]
C000006154 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00% [8]
C000006154 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [8]
C000006154 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [8]
C000006154 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [8]
C000006154 [Member] | Liabilities in Excess of Other Assets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%) [8]
C000006154 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [8]
[1] Excludes short-term securities.
[2] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[3] Excludes short-term securities.
[4] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[5]
Excludes short-term securities.
[6]
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[7] Excludes short-term securities.
[8] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.