v3.26.3
S000084745 [Member] Annual Fund Operating Expenses - AB Mid Cap Value Portfolio
Jun. 30, 2026
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination October 31, 2027
Class Z  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.63%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.02%
Component3 Other Expenses 13.54%
Other Expenses (as a percentage of Assets): 13.56%
Expenses (as a percentage of Assets) 14.19%
Fee Waiver or Reimbursement (13.52%) [1]
Net Expenses (as a percentage of Assets) 0.67%
[1]
The Adviser has contractually agreed to waive fees and/or bear expenses of the Fund to the extent necessary to prevent Total Other Expenses (excluding transfer agent expenses, acquired fund fees and expenses other than the advisory fees of any AB Funds in which the Fund may invest, interest expense, taxes, extraordinary expenses, and brokerage commissions and other transaction costs), on an annualized basis, from exceeding 0.02% of the average daily net assets for Class Z shares (“expense limitation”). Any fees waived and expenses borne by the Adviser may be reimbursed by the Fund until the end of the third fiscal year after the fiscal period in which the fee was waived or the expense was borne, provided that no reimbursement payment will be made that would cause the Fund’s Total Other Expenses to exceed the expense limitation. In addition, in connection with the Fund’s investments in AB Government Money Market Portfolio (the “Money Market Portfolio”) (except for the investment of any cash collateral from securities lending), the Adviser has contractually agreed to waive its management fee from the Fund and/or reimburse other expenses of the Fund in an amount equal to the Fund’s pro rata share of the Money Market Portfolio’s effective management fee. The expense limitations and waiver agreement will each remain in effect until October 31, 2027 and may only be terminated or changed with the consent of the Fund’s Board of Directors. In addition, the expense limitations and waiver agreement will be automatically extended for one‑year terms unless the Adviser provides notice of termination to the Fund at least 60 days prior to the end of the period.