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State Street Real Estate Securities VIS Fund Investment Objectives and Goals - State Street Real Estate Securities VIS Fund
Dec. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] State Street Real EstateSecurities V.I.S. Fund
Objective [Heading] <span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;">Investment Objective</span>
Objective, Primary [Text Block] The investment objective of the State Street Real Estate Securities V.I.S. Fund (the “Fund”) is maximum total return through current income and capital appreciation.