v3.26.1
State Street Moderate ETF Portfolio Shareholder Fees - State Street Moderate ETF Portfolio
Dec. 31, 2025
USD ($)
Class A  
Prospectus [Line Items]  
Shareholder Fee, Other $ 0
Class B  
Prospectus [Line Items]  
Shareholder Fee, Other 0
Class E  
Prospectus [Line Items]  
Shareholder Fee, Other $ 0