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AB Tax-Managed All Market Income Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading AB Tax‑Managed All Market Income Portfolio
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund’s investment objective is to seek current income with consideration of capital appreciation.
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. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in Advisor Class shares, which are not reflected in the tables or the examples below. You may qualify for sales charge reductions if you and members of your family invest, or agree to invest in the future, at least $100,000 in the family of AB Mutual Funds sponsored by AllianceBernstein L.P., the Fund’s investment adviser (the “Adviser”). More information about these and other discounts is available from your financial intermediary and in Investing in the Funds—Sales Charge Reduction Programs for Class A Shares on page 48 of this Prospectus, in Appendix B—Financial Intermediary Waivers of this Prospectus, and in Purchase of Shares—Sales Charge Reduction Programs for Class A Shares on page 106 of the Fund’s Statement of Additional Information (“SAI”).
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)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination December 31, 2023
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 72% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 72.00%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Purchases of Class A shares in amounts of $1,000,000 or more may be subject to a 1%, 1‑year contingent deferred sales charge, or CDSC, which may be subject to waiver in certain circumstances.For Class C shares, the CDSC is 0% after the first year. Class C shares automatically convert to Class A shares after eight years.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge reductions if you and members of your family invest, or agree to invest in the future, at least $100,000 in the family of AB Mutual Funds sponsored by AllianceBernstein L.P., the Fund’s investment adviser (the “Adviser”).
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 100,000
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. The Examples 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 these periods. The Examples also assume that your investment has a 5% return each year, that the Fund’s operating expenses stay the same and that any fee waivers remain in effect through the date indicated above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading PRINCIPAL STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Adviser allocates the Fund’s investments primarily among a broad range of income-producing securities, including common stock of companies that regularly pay dividends, preferred stocks, debt securities (including high-yield debt securities, also known as “junk bonds”), and derivatives related to these types of securities. The Fund pursues a global strategy, typically investing in securities of issuers located in the United States and in other countries throughout the world, including emerging market countries.
In selecting equity securities for the Fund, the Adviser focuses on securities that have high dividend yields and that it believes are undervalued by the market relative to their long-term earnings potential. In order to provide diversification and the opportunity for increased return, the Adviser also acquires equity securities for the Fund that are expected to exhibit relatively little correlation with the returns of the Fund’s holdings in high dividend yield equity securities.
The Fund intends to meet the tax requirement for passing municipal bond interest through to Fund shareholders as tax‑exempt interest dividends, which currently requires that at least 50% of the Fund’s assets be invested in tax‑exempt debt securities. In the event that the Internal Revenue Code or the related rules, regulations and interpretations of the Internal Revenue Service should in the future change so as to permit the Fund to pass through tax‑exempt dividends when the Fund invests a lesser amount of its assets in tax‑exempt debt securities, the Fund’s allocations to equity securities may increase. In selecting tax‑exempt securities for the Fund’s debt investments, the Adviser may draw on the capabilities of separate investment teams that specialize in different areas that are generally defined by the maturity of the debt securities and/or their ratings. These fixed-income teams draw on the resources and expertise of the Adviser’s fixed-income research staff, which includes fixed-income research analysts and economists.
In addition, the Fund may engage in certain alternative income strategies that generally utilize derivatives to diversify sources of income and manage risk. For example, the Fund may take long positions in currency derivatives on higher yielding currencies and/or short positions in currency derivatives on lower yielding currencies.
The Adviser adjusts the Fund’s investment exposure utilizing the Adviser’s Dynamic Asset Allocation (“DAA”) approach. DAA comprises a series of analytical and forecasting tools employed by the Adviser to gauge fluctuations in the risk/return profile of various asset classes. DAA seeks to adjust the Fund’s investment exposure in changing market conditions and thereby reduce overall portfolio volatility by mitigating the effects of market fluctuations, while preserving consistent long-term return potential. For example, the Adviser may seek to reduce the Fund’s risk exposure to one or more assets classes when DAA suggests that market risks relevant to those asset classes are rising but return opportunities are declining. In addition to merely increasing or decreasing asset class exposure by buying or selling securities of that asset class, the Adviser may pursue DAA implementation for the Fund by investing in derivatives or exchange-traded funds (“ETFs”).
The Adviser intends to utilize a variety of derivatives in its management of the Fund. The Adviser may use derivatives to gain exposure to an asset class, such as using interest rate derivatives to gain exposure to certain bonds. As noted above, the Adviser may separately pursue certain alternative investment strategies that utilize derivatives, and may enter into derivatives in making the adjustments called for by DAA. As a result of the use of derivatives, the Fund may be leveraged, with net investment exposure in excess of net assets.
Currency exchange rate fluctuation can have a dramatic impact on returns. The Fund’s foreign currency exposures will come from investment in securities priced or denominated in foreign currencies and from direct holdings in foreign currencies and currency-related derivatives. The Adviser may seek to hedge all or a portion of the currency exposure resulting from Fund investments or decide not to hedge this exposure.
 
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
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Market Risk: The value of the Fund’s assets will fluctuate as the stock or bond market fluctuates. The value of its investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events, including public health crises (including the occurrence of a contagious disease or illness) and regional and global conflicts, that affect large portions of the market. It includes the risk that a particular style of investing, such as growth or value, may be underperforming the stock market generally. 
•  
Allocation Risk: The allocation of investments among different investment styles, such as equity or debt, growth or value, U.S. or non‑U.S. securities, or diversification strategies, may have a more significant effect on the Fund’s net asset value, or NAV, when one of these investments is performing more poorly than another. 
•  
Credit Risk: An issuer or guarantor of a fixed-income security, or the counterparty to a derivatives or other contract, may be unable or unwilling to make timely payments of interest or principal, or to otherwise honor its obligations. The issuer or guarantor may default, causing a loss of the full principal amount of a security and accrued interest. The degree of risk for a particular security may be reflected in its credit rating. There is the possibility that the credit rating of a fixed-income security may be downgraded after purchase, which may adversely affect the value of the security. Investments in fixed-income securities with lower ratings (commonly known as “junk bonds”) are subject to a higher probability that an issuer will default or fail to meet its payment obligations. 
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High Yield Debt Securities Risk: Investments in fixed-income securities with lower ratings (commonly known as “junk bonds”) tend to have a higher probability that an issuer will default or fail to meet its payment obligations. These securities may be subject to greater price volatility due to such factors as specific corporate developments, interest rate sensitivity, negative perceptions of the junk bond market generally and less secondary market liquidity. 
•  
Interest Rate Risk: Changes in interest rates will affect the value of the Fund’s investments in fixed-income securities. When interest rates rise, the value of existing investments in fixed-income securities tends to fall and this decrease in value may not be offset by higher income from new investments. Interest rate risk is generally greater for fixed-income securities with longer maturities or durations. The Fund may be subject to a greater risk of rising interest rates than would normally be the case due to the end of the recent period of historically low rates and the effect of potential central bank monetary policy, and government fiscal policy, initiatives and resulting market reactions to those initiatives. 
•  
Inflation Risk: This is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the value of the Fund’s assets can decline as can the value of the Fund’s distributions. This risk is significantly greater for fixed-income securities with longer maturities. 
•  
Municipal Market Risk: This is the risk that special factors may adversely affect the value of municipal securities and have a significant effect on the yield or value of the Fund’s investments in municipal securities. These factors include economic conditions, political or legislative changes, public health crises, uncertainties related to the tax status of municipal securities, and the rights of investors in these securities. To the extent that the Fund invests more of its assets in a particular state’s municipal securities, the Fund may be vulnerable to events adversely affecting that state, including economic, political and regulatory occurrences, court decisions, terrorism, public health crises (including the occurrence of a contagious disease or illness) and catastrophic natural disasters, such as hurricanes, fires or earthquakes. For example, the novel coronavirus (COVID‑19) pandemic has significantly stressed the financial resources of many issuers of municipal securities, which could impair any such issuer’s ability to meet its financial obligations when due and adversely impact the value of its securities held by the Fund. As the full effects of the COVID‑19 pandemic on state and local economies and on issuers of municipal securities are still uncertain, the financial difficulties of issuers of municipal securities may worsen, adversely affecting the performance of the Fund. The Fund’s investments in certain municipal securities with principal and interest payments that are made from the revenues of a specific project or facility, and not general tax revenues, may have increased risks. Factors affecting the project or facility, such as local business or economic conditions, could have a significant effect on the project’s ability to make payments of principal and interest on these securities. 
In addition, changes in tax rates or the treatment of income from certain types of municipal securities, among other things, could negatively affect the municipal securities markets. 
•  
Foreign (Non‑U.S.) Risk: The Fund’s investments in securities of non‑U.S. issuers may involve more risk than those of U.S. issuers. These securities may fluctuate more widely in price and may be more difficult to trade due to adverse market, economic, political, regulatory or other factors. 
•  
Currency Risk: Fluctuations in currency exchange rates may negatively affect the value of the Fund’s investments or reduce its returns. 
•  
Emerging Market Risk: Investments in emerging market countries may have more risk because the markets are less developed and less liquid as well as being subject to increased economic, political, regulatory or other uncertainties. 
•  
Derivatives Risk: Derivatives may be difficult to price or unwind and leveraged so that small changes may produce disproportionate losses for the Fund. A short position in a derivative instrument involves the risk of a theoretically unlimited increase in the value of the underlying asset, which could cause the Fund to suffer a (potentially unlimited) loss. Derivatives, especially over‑the‑counter derivatives, are also subject to counterparty risk, which is the risk that the counterparty (the party on the other side of the transaction) on a derivative transaction will be unable or unwilling to honor its contractual obligations to the Fund. 
•  
Leverage Risk: To the extent the Fund uses leveraging techniques, its NAV may be more volatile because leverage tends to exaggerate the effect of changes in interest rates and any increase or decrease in the value of the Fund’s investments. 
•  
Illiquid Investments Risk: Illiquid investments risk exists when certain investments become difficult to purchase or sell. Difficulty in selling such investments may result in sales at disadvantageous prices affecting the value of your investment in the Fund. Causes of illiquid investments risk may include low trading volumes and large positions. Foreign fixed-income securities may have more illiquid investments risk because secondary trading markets for these securities may be smaller and less well-developed and the securities may trade less frequently. Illiquid investments risk may be higher in a rising interest rate environment, when the value and liquidity of fixed-income securities generally go down. 
•  
Management Risk: The Fund is subject to management risk because it is an actively-managed investment fund. The Adviser will apply its investment techniques and risk analyses in making investment decisions for the Fund, but there is no guarantee that its techniques will produce the intended results. Some of these techniques may incorporate, or rely upon, quantitative models, but there is no guarantee that these models will generate accurate forecasts, reduce risk or otherwise perform as expected. The Fund’s tax‑management strategies may result in it forgoing performance in favor of tax benefits that may not materialize, or may result in pre‑tax performance that is lower than that of funds that do not use tax‑management strategies. 
As with all investments, you may lose money by investing in the Fund.
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:
  
•  
how the Fund’s performance changed from year to year over ten years; and
•  
how the Fund’s average annual returns for one, five and ten years compare to those of a broad-based securities market index.
You may obtain updated performance information on the Fund’s website at www.abfunds.com (click on “Investments—Mutual Funds”). 
The Fund’s past performance before and after taxes, of course, does not necessarily indicate how it will perform in the future. 
Effective April 17, 2017, the Fund changed its name from AB Tax‑Managed Balanced Wealth Strategy to AB Tax‑Managed All Market Income Portfolio and its investment objective from total return, to current income with consideration of capital appreciation. The Fund also made certain material changes to its principal strategies, including the elimination of relatively static asset allocation targets for investment, but continues to invest a majority of its assets in tax‑exempt debt securities. Accordingly, the performance shown below for periods prior to April 17, 2017 is based on the Fund’s prior principal strategies and may not be representative of the Fund’s performance under its current principal strategies. 
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns •   how the Fund’s performance changed from year to year over ten years; and •   how 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 information for the MSCI ACWI (net) Index is presented to show how the Fund’s performance compares with the returns of an index of securities similar to those in which the Fund invests.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.abfunds.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 A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown. Through September 30, 2022, the year‑to‑date unannualized return for Class A shares was ‑21.81%.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The annual returns in the bar chart are for the Fund’s Class A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.
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 8.29%, 2nd quarter, 2020; and Worst Quarter was down -18.60%, 1st quarter, 2020.
Performance Table Heading rr_PerformanceTableHeading Performance Table Average Annual Total Returns (For the periods ended December 31, 2021)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After‑tax returns: – Are estimates 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.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After‑tax returns: – Are shown for Class A shares only and will vary for other Classes of shares because these Classes have different expense ratios;
AB Tax-Managed All Market Income Portfolio | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.25%
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOther none [1]
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.05%
Other Expenses rr_Component2OtherExpensesOverAssets 0.55%
Total Other Expenses rr_OtherExpensesOverAssets 0.60%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.41%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.41%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.00%
After 1 Year rr_ExpenseExampleYear01 $ 523
After 3 Years rr_ExpenseExampleYear03 814
After 5 Years rr_ExpenseExampleYear05 1,126
After 10 Years rr_ExpenseExampleYear10 $ 2,010
2012 rr_AnnualReturn2012 8.13%
2013 rr_AnnualReturn2013 10.16%
2014 rr_AnnualReturn2014 3.68%
2015 rr_AnnualReturn2015 (0.01%)
2016 rr_AnnualReturn2016 1.92%
2017 rr_AnnualReturn2017 10.94%
2018 rr_AnnualReturn2018 (4.78%)
2019 rr_AnnualReturn2019 17.89%
2020 rr_AnnualReturn2020 (1.20%)
2021 rr_AnnualReturn2021 8.33%
Year to Date Return, Label rr_YearToDateReturnLabel year‑to‑date
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2022
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (21.81%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.29%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.60%)
1 Year rr_AverageAnnualReturnYear01 3.71% [3]
5 Years rr_AverageAnnualReturnYear05 5.00% [3]
10 Years rr_AverageAnnualReturnYear10 4.86% [3]
AB Tax-Managed All Market Income Portfolio | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOther 1.00% [4]
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.06%
Other Expenses rr_Component2OtherExpensesOverAssets 0.54%
Total Other Expenses rr_OtherExpensesOverAssets 0.60%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.16%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.41%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.75%
After 1 Year rr_ExpenseExampleYear01 $ 278 [5]
After 3 Years rr_ExpenseExampleYear03 637
After 5 Years rr_ExpenseExampleYear05 1,122
After 10 Years rr_ExpenseExampleYear10 $ 2,270
1 Year rr_AverageAnnualReturnYear01 6.52%
5 Years rr_AverageAnnualReturnYear05 5.13%
10 Years rr_AverageAnnualReturnYear10 4.54%
AB Tax-Managed All Market Income Portfolio | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOther none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.05%
Other Expenses rr_Component2OtherExpensesOverAssets 0.55%
Total Other Expenses rr_OtherExpensesOverAssets 0.60%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.16%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.42%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.74%
After 1 Year rr_ExpenseExampleYear01 $ 76
After 3 Years rr_ExpenseExampleYear03 327
After 5 Years rr_ExpenseExampleYear05 598
After 10 Years rr_ExpenseExampleYear10 $ 1,372
1 Year rr_AverageAnnualReturnYear01 8.59%
5 Years rr_AverageAnnualReturnYear05 6.19%
10 Years rr_AverageAnnualReturnYear10 5.59%
AB Tax-Managed All Market Income Portfolio | Return After Taxes on Distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.02% [3]
5 Years rr_AverageAnnualReturnYear05 3.75% [3]
10 Years rr_AverageAnnualReturnYear10 3.95% [3]
AB Tax-Managed All Market Income Portfolio | Return After Taxes on Distributions and Sale of Fund Shares | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.20% [3]
5 Years rr_AverageAnnualReturnYear05 3.88% [3]
10 Years rr_AverageAnnualReturnYear10 3.87% [3]
AB Tax-Managed All Market Income Portfolio | Bloomberg 5-year General Obligation Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.29%
5 Years rr_AverageAnnualReturnYear05 2.91%
10 Years rr_AverageAnnualReturnYear10 2.22%
AB Tax-Managed All Market Income Portfolio | MSCI ACWI (net) Index (reflects no deduction for fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 18.54% [6]
5 Years rr_AverageAnnualReturnYear05 14.40% [6]
10 Years rr_AverageAnnualReturnYear10 11.85% [6]
[1] Purchases of Class A shares in amounts of $1,000,000 or more may be subject to a 1%, 1‑year contingent deferred sales charge, or CDSC, which may be subject to waiver in certain circumstances.
[2] The Adviser has contractually agreed to waive its management fees and/or to bear expenses of the Fund through December 31, 2023 to the extent necessary to prevent total Fund operating expenses (excluding acquired fund fees and expenses, interest expense, taxes, extraordinary expenses, and brokerage commissions and other transaction costs), on an annualized basis, from exceeding .99%, 1.74% and .74% of average daily net assets, respectively, for Class A, Class C and Advisor Class shares. In connection with the Fund’s investments in AB Government Money Market Portfolio (the “Money Market Portfolio”) (except for the investment of any cash collateral from securities lending), the Adviser has contractually agreed to waive its management fee from the Fund and/or reimburse other expenses of the Fund in an amount equal to the Fund’s pro rata share of the Money Market Portfolio’s effective management fee, as included in “Acquired Fund Fees and Expenses”. Each of these agreements may only be terminated or changed with the consent of the Fund’s Board of Trustees.
[3] After-tax returns: – Are shown for Class A shares only and will vary for other Classes of shares because these Classes have different expense ratios; – Are estimates based on the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes; 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.
[4] For Class C shares, the CDSC is 0% after the first year. Class C shares automatically convert to Class A shares after eight years.
[5] If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.
[6] The information for the MSCI ACWI (net) Index is presented to show how the Fund’s performance compares with the returns of an index of securities similar to those in which the Fund invests.