v3.26.3
S000010351 [Member] Expense Example - AB National Portfolio
May 31, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 374
Expense Example, with Redemption, 3 Years 543
Expense Example, with Redemption, 5 Years 726
Expense Example, with Redemption, 10 Years 1,256
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 253 [1]
Expense Example, with Redemption, 3 Years 485
Expense Example, with Redemption, 5 Years 840
Expense Example, with Redemption, 10 Years 1,639
Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 171
Expense Example, with Redemption, 5 Years 302
Expense Example, with Redemption, 10 Years $ 684
[1]
If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.