v3.26.1
SA Large Cap Index Portfolio Annual Fund Operating Expenses - SA Large Cap Index Portfolio
Dec. 31, 2025
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination <span style="font-family:Arial;font-size:8pt;">April 30, 2027</span>
Class 1  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.36%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.03%
Expenses (as a percentage of Assets) 0.39%
Fee Waiver or Reimbursement (0.14%) [1]
Net Expenses (as a percentage of Assets) 0.25% [1]
Class 3  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.36%
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 0.03%
Expenses (as a percentage of Assets) 0.64%
Fee Waiver or Reimbursement (0.14%) [1]
Net Expenses (as a percentage of Assets) 0.50% [1]
[1] Pursuant to a Master Advisory Fee Waiver Agreement, effective through April 30, 2027, SunAmerica Asset Management, LLC (“SunAmerica”) is contractually obligated to waive a portion of its advisory fee on an annual basis with respect to the Portfolio so that the advisory fee payable by the Portfolio to SunAmerica is equal to 0.26% of the Portfolio’s average daily net assets on the first $2 billion, $0.18% of the Portfolio’s average daily net assets on the next $1 billion, and 0.14% of the Portfolio’s average daily net assets over $3 billion. This agreement may be terminated prior to April 30, 2027only with the approval of the Board of Trustees of SunAmerica Series Trust.