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AB Global Real Estate Investment Fund II | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
Risk/Return [Heading] | rr_RiskReturnHeading | SUMMARY INFORMATION AB Global Real Estate Investment Fund II | |||||||||||||||||||||||||||||||
Objective [Heading] | rr_ObjectiveHeading | INVESTMENT OBJECTIVE | |||||||||||||||||||||||||||||||
Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The Fund’s investment objective is total return from long-term growth of capital and income.
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Expense [Heading] | rr_ExpenseHeading | FEES AND EXPENSES OF THE FUND | |||||||||||||||||||||||||||||||
Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund.
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Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | Shareholder Fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||
Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||
Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | Portfolio Turnover | |||||||||||||||||||||||||||||||
Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | The Fund pays transaction costs, such as commissions, when it buys or sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These transaction costs, which are not reflected in the Annual Fund Operating Expenses or in the Examples, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 53% of the average value of its portfolio.
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Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 53.00% | |||||||||||||||||||||||||||||||
Expense Example [Heading] | rr_ExpenseExampleHeading | Examples | |||||||||||||||||||||||||||||||
Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. They assume that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. They also assume that your investment has a 5% return each year and that the Fund’s operating expenses stay the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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Strategy [Heading] | rr_StrategyHeading | PRINCIPAL STRATEGIES | |||||||||||||||||||||||||||||||
Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Under normal circumstances, the Fund invests at least 80% of its net assets in the equity securities of real estate investment trusts, or REITs, and other real estate industry companies, such as real estate operating companies. The Fund invests in real estate companies that the Adviser believes have strong property fundamentals and management teams. The Fund seeks to invest in real estate companies whose underlying portfolios are diversified geographically and by property type.
The Fund invests in U.S. and non‑U.S. issuers. Under normal circumstances, the Fund invests significantly (at least 40%—unless market conditions are not deemed favorable by the Adviser) in securities of non‑U.S. companies. In addition, the Fund invests, under normal circumstances, in the equity securities of companies located in at least three countries. Equity securities include common stock, shares of beneficial interest of REITs, and securities with common stock characteristics, such as preferred stock or convertible securities (“real estate equity securities”).
The Fund’s investment policies emphasize investment in companies determined by the Adviser to be undervalued relative to their peers, using a fundamental value approach. In selecting real estate equity securities, the Adviser’s research and investment process seeks to identify globally those companies where the magnitude and growth of cash flow streams have not been appropriately reflected in the price of the security. These securities may trade at a more attractive valuation than others that may have similar overall fundamentals. The Adviser’s fundamental research efforts are focused on forecasting the short- and long-term normalized cash generation capability of real estate companies by isolating supply and demand for property types in local markets, determining the replacement value of properties, assessing future development opportunities, and normalizing capital structures of real estate companies.
The Fund may invest in mortgage-backed securities, which are securities that directly or indirectly represent participations in, or are collateralized by and payable from, mortgage loans secured by real property. These securities include mortgage pass-through certificates, real estate mortgage investment conduit certificates, or REMICs, and collateralized mortgage obligations, or CMOs. The Fund may also invest in short-term investment grade debt securities and other fixed-income securities.
Currency exposures can have a dramatic impact on equity return, significantly adding to returns in some years and greatly diminishing them in others. The Adviser may seek to hedge the currency exposure resulting from a securities position when it finds the currency exposure unattractive. To hedge a portion of its currency risk, the Fund may from time to time invest in currency-related derivatives, including forward currency exchange contracts, futures contracts, options on futures contracts, swaps and options. Equity positions and whether to hedge currency exposure are evaluated separately by the Adviser. The Adviser also may seek investment opportunities by taking long or short positions in currencies through the use of currency-related derivatives.
The Fund may enter into forward commitments and standby commitment agreements. The Fund may enter into other 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 exchange-traded funds (“ETFs”). These transactions may be used, for example, 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, sometimes within certain ranges.
The Fund may, at times, invest in ETFs in lieu of making direct investments in equity securities. ETFs may provide more efficient and economical exposure to the type of companies and geographic locations in which the Fund seeks to invest than direct investments.
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Strategy Portfolio Concentration [Text] | rr_StrategyPortfolioConcentration | Under normal circumstances, the Fund invests at least 80% of its net assets in the equity securities of real estate investment trusts, or REITs, and other real estate industry companies, such as real estate operating companies. | |||||||||||||||||||||||||||||||
Risk [Heading] | rr_RiskHeading | PRINCIPAL RISKS | |||||||||||||||||||||||||||||||
Risk Narrative [Text Block] | rr_RiskNarrativeTextBlock |
As with all investments, you may lose money by investing in the Fund.
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Risk Lose Money [Text] | rr_RiskLoseMoney | As with all investments, you may lose money by investing in the Fund. | |||||||||||||||||||||||||||||||
Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | BAR CHART AND PERFORMANCE INFORMATION | |||||||||||||||||||||||||||||||
Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The bar chart and performance information provide an indication of the historical risk of an investment in the Fund by showing:
You can obtain updated performance information for the Fund at www.bernstein.com (click on “Investments,” then “Mutual Fund Performance at a Glance”).
The Fund’s past performance before and after taxes, of course, does not necessarily indicate how it will perform in the future.
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Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | how the Fund’s performance changed from year to year over ten years; andhow the Fund’s average annual returns for one, five and ten years compare to those of a broad-based securities market index. | |||||||||||||||||||||||||||||||
Performance Additional Market Index [Text] | rr_PerformanceAdditionalMarketIndex | The FTSE EPRA/NAREIT Developed Real Estate Index provides information about the performance of REITs in global markets. The MSCI World Index (net) provides broad-based information about the performance of global markets. The FTSE NAREIT Equity REIT Index provides information about the performance of REITs in the U.S. | |||||||||||||||||||||||||||||||
Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.bernstein.com | |||||||||||||||||||||||||||||||
Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | The Fund’s past performance before and after taxes, of course, does not necessarily indicate how it will perform in the future. | |||||||||||||||||||||||||||||||
Bar Chart [Heading] | rr_BarChartHeading | Bar Chart | |||||||||||||||||||||||||||||||
Bar Chart Narrative [Text Block] | rr_BarChartNarrativeTextBlock | The annual returns in the bar chart are for the Fund’s Class I shares.
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Bar Chart Closing [Text Block] | rr_BarChartClosingTextBlock | Calendar Year End (%) During the period shown in the bar chart, the Fund’s: Best Quarter was up 15.18%, 1st quarter, 2019; and Worst Quarter was down -26.82%, 1st quarter, 2020. | |||||||||||||||||||||||||||||||
Performance Table Heading | rr_PerformanceTableHeading | Performance Table Average Annual Total Returns (For the periods ended December 31, 2022) | |||||||||||||||||||||||||||||||
Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | After‑tax Returns:–Are an estimate, which is based on the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes; | |||||||||||||||||||||||||||||||
Performance Table Not Relevant to Tax Deferred | rr_PerformanceTableNotRelevantToTaxDeferred | actual after‑tax returns depend on an individual investor’s tax situation and are likely to differ from those shown; and–Are not relevant to investors who hold Fund shares through tax‑deferred arrangements such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||||||
AB Global Real Estate Investment Fund II | Class I | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
Shareholder Fees (fees paid directly from your investment) | rr_ShareholderFeeOther | none | |||||||||||||||||||||||||||||||
Management Fees | rr_ManagementFeesOverAssets | 0.55% | |||||||||||||||||||||||||||||||
Distribution and/or Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | |||||||||||||||||||||||||||||||
Other Expenses: Transfer Agent | rr_Component1OtherExpensesOverAssets | 0.01% | |||||||||||||||||||||||||||||||
Other Expenses | rr_Component2OtherExpensesOverAssets | 0.18% | |||||||||||||||||||||||||||||||
Total Other Expenses | rr_OtherExpensesOverAssets | 0.19% | |||||||||||||||||||||||||||||||
Total Annual Fund Operating Expenses | rr_ExpensesOverAssets | 0.74% | |||||||||||||||||||||||||||||||
After 1 Year | rr_ExpenseExampleYear01 | $ 76 | |||||||||||||||||||||||||||||||
After 3 Years | rr_ExpenseExampleYear03 | 237 | |||||||||||||||||||||||||||||||
After 5 Years | rr_ExpenseExampleYear05 | 411 | |||||||||||||||||||||||||||||||
After 10 Years | rr_ExpenseExampleYear10 | $ 918 | |||||||||||||||||||||||||||||||
2013 | rr_AnnualReturn2013 | 5.91% | |||||||||||||||||||||||||||||||
2014 | rr_AnnualReturn2014 | 14.56% | |||||||||||||||||||||||||||||||
2015 | rr_AnnualReturn2015 | 0.38% | |||||||||||||||||||||||||||||||
2016 | rr_AnnualReturn2016 | 3.44% | |||||||||||||||||||||||||||||||
2017 | rr_AnnualReturn2017 | 14.43% | |||||||||||||||||||||||||||||||
2018 | rr_AnnualReturn2018 | (4.32%) | |||||||||||||||||||||||||||||||
2019 | rr_AnnualReturn2019 | 23.53% | |||||||||||||||||||||||||||||||
2020 | rr_AnnualReturn2020 | (4.62%) | |||||||||||||||||||||||||||||||
2021 | rr_AnnualReturn2021 | 26.53% | |||||||||||||||||||||||||||||||
2022 | rr_AnnualReturn2022 | (25.35%) | |||||||||||||||||||||||||||||||
Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best Quarter | |||||||||||||||||||||||||||||||
Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Mar. 31, 2019 | |||||||||||||||||||||||||||||||
Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 15.18% | |||||||||||||||||||||||||||||||
Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst Quarter | |||||||||||||||||||||||||||||||
Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | |||||||||||||||||||||||||||||||
Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (26.82%) | |||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (25.35%) | [1] | ||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 1.26% | [1] | ||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 4.38% | [1] | ||||||||||||||||||||||||||||||
AB Global Real Estate Investment Fund II | Return After Taxes on Distributions | Class I | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (26.56%) | [1],[2] | ||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | (0.24%) | [1],[2] | ||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 2.55% | [1],[2] | ||||||||||||||||||||||||||||||
AB Global Real Estate Investment Fund II | Return After Taxes on Distributions and Sale of Fund Shares | Class I | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (14.51%) | [1],[2] | ||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 0.61% | [1],[2] | ||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 2.73% | [1],[2] | ||||||||||||||||||||||||||||||
AB Global Real Estate Investment Fund II | S&P 500 Index | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (18.11%) | |||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 9.42% | |||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 12.56% | |||||||||||||||||||||||||||||||
AB Global Real Estate Investment Fund II | FTSE EPRA/NAREIT Developed Real Estate Index (net) (reflects no deduction for fees, expenses, or taxes except the reinvestment of dividends net of non-U.S. withholding taxes) | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (25.09%) | [3] | ||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | (0.23%) | [3] | ||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 2.99% | [3] | ||||||||||||||||||||||||||||||
AB Global Real Estate Investment Fund II | MSCI World Index (net) (reflects no deduction for fees, expenses or taxes except the reinvestment of dividends net of non-U.S. withholding taxes) | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (18.14%) | [3] | ||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 6.14% | [3] | ||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 8.85% | [3] | ||||||||||||||||||||||||||||||
AB Global Real Estate Investment Fund II | FTSE NAREIT Equity REIT Index (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||||||||
Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||||||||||||||||||||
1 Year | rr_AverageAnnualReturnYear01 | (24.95%) | [3] | ||||||||||||||||||||||||||||||
5 Years | rr_AverageAnnualReturnYear05 | 4.43% | [3] | ||||||||||||||||||||||||||||||
10 Years | rr_AverageAnnualReturnYear10 | 7.10% | [3] | ||||||||||||||||||||||||||||||
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