S000084745 [Member] Shareholder Fees - AB Mid Cap Value Portfolio - Class Z |
Jun. 30, 2026 |
|---|---|
| Prospectus [Line Items] | |
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | 0.00% |
| Maximum Deferred Sales Charge (as a percentage) | 0.00% |
| Exchange Fee (as a percentage of Amount Redeemed) | 0.00% |