v3.26.3
S000043215 [Member] Expense Example - AB Concentrated Growth Fund
Jun. 30, 2026
USD ($)
Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 79
Expense Example, with Redemption, 3 Years 246
Expense Example, with Redemption, 5 Years 428
Expense Example, with Redemption, 10 Years 954
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 525
Expense Example, with Redemption, 3 Years 736
Expense Example, with Redemption, 5 Years 964
Expense Example, with Redemption, 10 Years 1,620
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 280 [1]
Expense Example, with Redemption, 3 Years 557
Expense Example, with Redemption, 5 Years 959
Expense Example, with Redemption, 10 Years 1,886
Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 87
Expense Example, with Redemption, 3 Years 271
Expense Example, with Redemption, 5 Years 471
Expense Example, with Redemption, 10 Years 1,049
Class Z  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 76
Expense Example, with Redemption, 3 Years 237
Expense Example, with Redemption, 5 Years 411
Expense Example, with Redemption, 10 Years $ 918
[1]
If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.