v3.26.3
S000045542 [Member] Annual Fund Operating Expenses - AB Small Cap Value Portfolio
Jun. 30, 2026
Class A  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.80%
Distribution and Service (12b-1) Fees 0.25%
Component1 Other Expenses 0.06%
Component3 Other Expenses 0.08% [1]
Other Expenses (as a percentage of Assets): 0.14%
Expenses (as a percentage of Assets) 1.19%
Class C  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.80%
Distribution and Service (12b-1) Fees 1.00%
Component1 Other Expenses 0.06%
Component3 Other Expenses 0.08% [1]
Other Expenses (as a percentage of Assets): 0.14%
Expenses (as a percentage of Assets) 1.94%
Advisor Class  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.80%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.06%
Component3 Other Expenses 0.08% [1]
Other Expenses (as a percentage of Assets): 0.14%
Expenses (as a percentage of Assets) 0.94%
[1]
“Other Expenses” includes acquired fund fees and expenses totaling less than 0.01%.