v3.26.3
S000010412 [Member] Expense Example - AB Discovery Value Fund
Jun. 30, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 531
Expense Example, with Redemption, 3 Years 757
Expense Example, with Redemption, 5 Years 1,000
Expense Example, with Redemption, 10 Years 1,697
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 287 [1]
Expense Example, with Redemption, 3 Years 579
Expense Example, with Redemption, 5 Years 995
Expense Example, with Redemption, 10 Years 1,962
Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 86
Expense Example, with Redemption, 3 Years 268
Expense Example, with Redemption, 5 Years 466
Expense Example, with Redemption, 10 Years 1,037
Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 287
Expense Example, with Redemption, 5 Years 498
Expense Example, with Redemption, 10 Years 1,108
Class Z  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 83
Expense Example, with Redemption, 3 Years 259
Expense Example, with Redemption, 5 Years 450
Expense Example, with Redemption, 10 Years $ 1,002
[1]
If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.