v3.26.1
SA JPMorgan MFS Core Bond Portfolio Annual Fund Operating Expenses - SA JPMorgan MFS Core Bond 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) 0.60%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.03%
Expenses (as a percentage of Assets) 0.63%
Fee Waiver or Reimbursement (0.10%) [1]
Net Expenses (as a percentage of Assets) 0.53% [1]
Class 2  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.60%
Distribution and Service (12b-1) Fees 0.15%
Other Expenses (as a percentage of Assets): 0.03%
Expenses (as a percentage of Assets) 0.78%
Fee Waiver or Reimbursement (0.10%) [1]
Net Expenses (as a percentage of Assets) 0.68% [1]
Class 3  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.60%
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 0.03%
Expenses (as a percentage of Assets) 0.88%
Fee Waiver or Reimbursement (0.10%) [1]
Net Expenses (as a percentage of Assets) 0.78% [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 0.50% of its advisory fee on an annual basis with respect to the Portfolio. This agreement may be modified or discontinued prior to April 30, 2027only with the approval of the Board of Trustees of SunAmerica Series Trust (the “Trust”), including a majority of the trustees who are not “interested persons” of the Trust as defined in the Investment Company Act of 1940, as amended.