S000010509 [Member] Investment Strategy - AB Growth Fund	Jun. 30, 2026
Prospectus [Line Items]
Strategy [Heading]	PRINCIPAL STRATEGIES
Strategy Narrative [Text Block]	The Fund invests primarily in domestic equity securities of companies selected by the Fund’s Adviser for their growth potential within various market sectors. The Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of companies meeting the Adviser’s growth criteria. For purposes of this policy, companies meeting the Adviser’s growth criteria are those companies with securities included in any one of the following indexes: the Russell 3000^® Growth Index, the MSCI ACWI IMI Growth, and the Morningstar Global All‑Cap Growth TME. When selecting securities, the Adviser seeks companies that have experienced management teams, strong market positions, and the potential to deliver greater-than-expected earnings growth rates. In managing the Fund, the Adviser allocates investments among broad sector groups and selects specific investments based on the fundamental company research conducted by the Adviser’s internal research staff, assessing the current and forecasted investment opportunities and conditions, as well as diversification and risk considerations. The Adviser’s research focus is on companies with high sustainable growth prospects, high or improving return on invested capital, transparent business models, and clear competitive advantages. The Fund has the flexibility to invest across the capitalization spectrum. The Fund is designed for those seeking exposure to companies of various sizes, and typically has substantial investments in both large-capitalization companies and mid‑capitalization companies, and may also invest in small-capitalization companies. The Fund may enter into derivatives transactions, such as options, futures contracts, forwards and swaps. The Fund may use options strategies involving the purchase and/or writing of various combinations of call and/or put options, including on individual securities and stock indices, futures contracts (including futures contracts on individual securities and stock indices) or shares of exchange-traded funds (“ETFs”). These transactions may be used, for example, in an effort to earn extra income, to adjust exposure to individual securities or markets, or to protect all or a portion of the Fund’s portfolio from a decline in value.

The Fund invests primarily in domestic equity securities of companies selected by the Fund’s Adviser for their growth potential within various market sectors. The Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of companies meeting the Adviser’s growth criteria. For purposes of this policy, companies meeting the Adviser’s growth criteria are those companies with securities included in any one of the following indexes: the Russell 3000^® Growth Index, the MSCI ACWI IMI Growth, and the Morningstar Global All‑Cap Growth TME. When selecting securities, the Adviser seeks companies that have experienced management teams, strong market positions, and the potential to deliver greater-than-expected earnings growth rates.

In managing the Fund, the Adviser allocates investments among broad sector groups and selects specific investments based on the fundamental company research conducted by the Adviser’s internal research staff, assessing the current and forecasted investment opportunities and conditions, as well as diversification and risk considerations. The Adviser’s research focus is on companies with high sustainable growth prospects, high or improving return on invested capital, transparent business models, and clear competitive advantages.

The Fund has the flexibility to invest across the capitalization spectrum. The Fund is designed for those seeking exposure to companies of various sizes, and typically has substantial investments in both large-capitalization companies and mid‑capitalization companies, and may also invest in small-capitalization companies.

The Fund may enter into derivatives transactions, such as options, futures contracts, forwards and swaps. The Fund may use options strategies involving the purchase and/or writing of various combinations of call and/or put options, including on individual securities and stock indices, futures contracts (including futures contracts on individual securities and stock indices) or shares of exchange-traded funds (“ETFs”). These transactions may be used, for example, in an effort to earn extra income, to adjust exposure to individual securities or markets, or to protect all or a portion of the Fund’s portfolio from a decline in value.