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Investment Objectives and Goals
Dec. 31, 2025
Class I | Mid Cap Growth Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] Mid Cap Growth Portfolio—Class I Shares
Objective [Heading] GOAL
Objective, Primary [Text Block]
The Fund seeks growth of capital.
Class I | Mid Cap Intrinsic Value Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] Mid Cap Intrinsic Value Portfolio—Class I Shares
Objective [Heading] GOAL
Objective, Primary [Text Block]
The Fund seeks growth of capital.
Class I | Quality Equity Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] Quality Equity Portfolio—Class I Shares
Objective [Heading] GOAL
Objective, Primary [Text Block]
The Fund seeks long-term growth of capital by investing primarily in securities of companies that meet the Fund’s Sustainable Investing Criteria.
Class I | Short Duration Bond Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] Short Duration Bond Portfolio—Class I Shares
Objective [Heading] GOAL
Objective, Primary [Text Block]
The Fund seeks the highest available current income consistent with liquidity and low risk to principal;
Objective, Secondary [Text Block] total return is a secondary goal.
Class S | Mid Cap Growth Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] Mid Cap Growth Portfolio—Class S Shares
Objective [Heading] GOAL
Objective, Primary [Text Block]
The Fund seeks growth of capital.
Class S | Mid Cap Intrinsic Value Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] Mid Cap Intrinsic Value Portfolio—Class S Shares
Objective [Heading] GOAL
Objective, Primary [Text Block]
The Fund seeks growth of capital.
Class S | Quality Equity Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] Quality Equity Portfolio—Class S Shares
Objective [Heading] GOAL
Objective, Primary [Text Block]
The Fund seeks long-term growth of capital by investing primarily in securities of companies that meet the Fund’s Sustainable Investing Criteria.