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AB GLOBAL RISK ALLOCATION FUND, INC.  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading AB Global Risk Allocation Fund
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund’s investment objective is total return consistent with reasonable risks through a combination of income and long-term growth of capital.
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 AB Mutual Funds. 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 67 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 136 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 February 28, 2025
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 13% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 13.00%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Purchases of Class A shares in amounts of $1,000,000 or more, or by certain group retirement plans, 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 AB Mutual Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 100,000
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Restated to reflect current fees, which excludes a one‑time non‑recurring accrual adjustment reflected in the 2023 Financial Highlights.
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 those 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 waiver and/or expense limitation is in effect for only the first year. 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 Fund invests dynamically in a number of global asset classes, including equity/credit, fixed-income, and inflation-sensitive instruments. In making decisions on the allocation of assets among asset classes, the Adviser will use a risk-balanced approach. This strategy attempts to provide investors with favorable long-term total return while minimizing exposure to material downside (“tail”) events. To execute this strategy, the Adviser assesses the volatility, tail loss and return potential of each asset. Fund assets are then allocated among asset classes so that no asset class dominates the expected tail loss of the Fund. This will generally result in the Fund having greater exposures to lower risk asset classes (such as fixed-income) than to higher risk asset classes. The Adviser will make frequent adjustments to the Fund’s asset class exposures based on its determinations of volatility, tail loss and return potential.
The asset classes in which the Fund may invest include:
•  
equity/credit—equity securities of all types and corporate fixed-income securities (regardless of credit quality, but subject to the limitations on high-yield securities set forth below);
•  
fixed-income—fixed-income securities of the U.S. and foreign governments and their agencies and instrumentalities; and
•  
inflation-sensitive—global inflation-indexed securities (including Treasury Inflation Protected Securities) and commodity-related instruments and derivatives (including commodity futures).
The Fund’s investments within each asset class are generally index-based—typically, portfolios of individual securities, derivatives or exchange-traded funds (“ETFs”) intended to track the performance of segments within each particular asset class. The inflation-sensitive asset class consists of instruments, the prices of which are affected directly or indirectly by the level and change in the rate of inflation, such as commodity derivatives.
Equity securities will comprise no more than 75% of the Fund’s investments. The Fund may invest in fixed-income securities with a range of maturities from short- to long-term. The Fund may invest up to 20% of its assets in high-yield securities (securities rated below BBB- by S&P Global Ratings (“S&P”), Moody’s Investors Service, Inc. (“Moody’s”), or Fitch Ratings (“Fitch”), or the equivalent by any other nationally recognized statistical rating organization (“NRSRO”), which are commonly known as “junk bonds”). As an operating policy, the Fund will invest no more than 5% of its assets in securities rated CCC- or below.
The Fund’s investments will generally be global in nature, and will generally include investments in both developed and emerging markets. The Fund typically invests at least 40% of its assets in securities of non-U.S. companies and/or foreign countries and their agencies and instrumentalities unless conditions are not deemed favorable by the Adviser, in which case the Fund will invest at least 30% of its assets in such foreign securities.
Derivatives, particularly futures contracts and swaps, often provide more efficient and economical exposure to market segments than direct investments, and the Fund’s exposure to certain types of assets may at times be achieved partially or substantially through investment in derivatives. Derivatives transactions may also be a quicker and more efficient way to alter the Fund’s exposure than buying and selling direct investments. In determining when and to what extent to enter into derivatives transactions, the Adviser considers factors such as the risk and returns of these investments relative to direct investments and the cost of such transactions.
Because derivatives transactions frequently require cash outlays that are only a small portion of the amount of exposure obtained through the derivative, a portion of the Fund’s assets may be held in cash or invested in cash equivalents to cover the Fund’s
derivatives obligations, such as short-term U.S. Government and agency securities, repurchase agreements and money market funds. At times, a combination of direct securities investments and derivatives will be used to gain asset class exposure so that the Fund’s aggregate exposure will substantially exceed its net assets (i.e., so that the Fund is effectively leveraged). In addition, the Fund may at times invest in shares of ETFs in lieu of making direct investments in securities.
While the Fund may seek to gain exposure to physical commodities traded in the commodities markets through investments in a variety of derivative instruments, the Adviser expects to seek exposure to commodities and commodities-related instruments and derivatives primarily through investments in AllianceBernstein Global Risk Allocation (Cayman) Ltd., a wholly-owned subsidiary of the Fund organized under the laws of the Cayman Islands (the “Subsidiary”). The Subsidiary is advised by the Adviser and has the same investment objective and substantially similar investment policies and restrictions as the Fund except that the Subsidiary, unlike the Fund, may invest, without limitation, in commodities and commodities-related instruments. The Fund is subject to the risks associated with the commodities, derivatives and other instruments in which the Subsidiary invests, to the extent of its investment in the Subsidiary. The Fund limits its investment in the Subsidiary to no more than 25% of its total assets. Investment in the Subsidiary is expected to provide the Fund with commodity exposure within the limitations of federal tax requirements that apply to the Fund.
Currency exchange rate fluctuations can have a dramatic impact on returns. The Adviser may seek to hedge all or a portion of the Fund’s currency exposure resulting from Fund investments or decide not to hedge this exposure. The Adviser may also cause the Fund to take on currency exposure for purposes other than hedging, relying on its fundamental and quantitative research with the goal of increasing returns or managing risk. Currency-related investments may include currencies acquired on a spot (i.e., cash) basis and currency-related derivatives, including forward currency exchange contracts and options on currencies.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
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.
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 information for the Bloomberg Global Aggregate Bond Index and for the composite index is presented to show how the Fund’s performance compares with the returns of indices 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.
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 10.97%, 2nd quarter, 2020; and Worst Quarter was down -14.97%, 1st quarter, 2020.
Performance Table Heading rr_PerformanceTableHeading Performance Table Average Annual Total Returns (For the periods ended December 31, 2023)
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 the other Classes of shares because these Classes have different expense ratios;
AB GLOBAL RISK ALLOCATION FUND, INC. | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock As with all investments, you may lose money by investing in the Fund.
AB GLOBAL RISK ALLOCATION FUND, INC. | Market Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Market Risk: The value of the Fund’s assets will fluctuate as the market or markets in which the Fund invests fluctuate. The value of the Fund’s 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 may be underperforming the market generally.
AB GLOBAL RISK ALLOCATION FUND, INC. | Allocation Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Allocation Risk: The allocation of investments among asset classes may have a significant effect on the Fund’s net asset value, or NAV, when the asset classes in which the Fund has invested more heavily perform worse than the asset classes invested in less heavily.
AB GLOBAL RISK ALLOCATION FUND, INC. | Interest Rate Risks  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Interest Rate Risk: Changes in interest rates will affect the value of 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 recent end of a period of historically low rates and the effects of potential central bank monetary policy, and government fiscal policy, initiatives and market reactions to those initiatives.
AB GLOBAL RISK ALLOCATION FUND, INC. | Credit Risks  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
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.
AB GLOBAL RISK ALLOCATION FUND, INC. | Commodity Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Commodity Risk: Investing in commodities and commodity-linked derivative instruments, either directly or through the Subsidiary, may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity, such as drought, floods, weather, livestock disease, embargoes, tariffs and international economic, political and regulatory developments.
AB GLOBAL RISK ALLOCATION FUND, INC. | Below Investment Grade Securities Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Below Investment Grade Securities Risk: Investments in fixed-income securities with ratings below investment grade, 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 and negative perceptions of the junk bond market generally and may be more difficult to trade or dispose of than other types of securities.
AB GLOBAL RISK ALLOCATION FUND, INC. | Foreign Non U S Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Foreign (Non-U.S.) Risk: 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.
AB GLOBAL RISK ALLOCATION FUND, INC. | Currency Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Currency Risk: Fluctuations in currency exchange rates may negatively affect the value of the Fund’s investments or reduce its returns.
AB GLOBAL RISK ALLOCATION FUND, INC. | Emerging Market Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
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.
AB GLOBAL RISK ALLOCATION FUND, INC. | Subsidiary Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Subsidiary Risk: By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary. The derivatives and other investments held by the Subsidiary are generally similar to those that are permitted to be held by the Fund and are subject to the same risks that apply to similar investments if held directly by the Fund. The Subsidiary is not registered under the Investment Company Act of 1940, as amended (the “1940 Act”), and, unless otherwise noted in this Prospectus, is not subject to all of the investor protections of the 1940 Act. However, the Fund wholly owns and controls the Subsidiary, and the Fund and the Subsidiary are managed by the Adviser, making it unlikely the Subsidiary will take actions contrary to the interests of the Fund or its shareholders. In addition, changes in federal tax laws applicable to the Fund or interpretations thereof could limit the Fund’s ability to gain exposure to commodities investments through investments in the Subsidiary.
AB GLOBAL RISK ALLOCATION FUND, INC. | Derivatives Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
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, reference rate or index, 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.
AB GLOBAL RISK ALLOCATION FUND, INC. | Leverage Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
Leverage Risk: Because 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.
AB GLOBAL RISK ALLOCATION FUND, INC. | Inflation Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
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.
AB GLOBAL RISK ALLOCATION FUND, INC. | Management Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
•  
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, 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.
AB GLOBAL RISK ALLOCATION FUND, INC. | 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 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.15%
Interest Expense rr_Component2OtherExpensesOverAssets 0.01%
Other Expenses rr_Component3OtherExpensesOverAssets 0.39%
Total Other Expenses rr_OtherExpensesOverAssets 0.55%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.43%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.42%
After 1 Year rr_ExpenseExampleYear01 $ 563
After 3 Years rr_ExpenseExampleYear03 857
After 5 Years rr_ExpenseExampleYear05 1,172
After 10 Years rr_ExpenseExampleYear10 $ 2,064
2014 rr_AnnualReturn2014 7.35%
2015 rr_AnnualReturn2015 (3.68%)
2016 rr_AnnualReturn2016 7.21%
2017 rr_AnnualReturn2017 11.79%
2018 rr_AnnualReturn2018 (9.03%)
2019 rr_AnnualReturn2019 16.30%
2020 rr_AnnualReturn2020 10.59%
2021 rr_AnnualReturn2021 12.04%
2022 rr_AnnualReturn2022 (9.96%)
2023 rr_AnnualReturn2023 6.09%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 10.97%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (14.97%)
1 Year rr_AverageAnnualReturnYear01 1.57% [3]
5 Years rr_AverageAnnualReturnYear05 5.68% [3]
10 Years rr_AverageAnnualReturnYear10 4.04% [3]
AB GLOBAL RISK ALLOCATION FUND, INC. | 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 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.16%
Interest Expense rr_Component2OtherExpensesOverAssets 0.01%
Other Expenses rr_Component3OtherExpensesOverAssets 0.39%
Total Other Expenses rr_OtherExpensesOverAssets 0.56%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.19%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 2.18%
After 1 Year rr_ExpenseExampleYear01 $ 321 [5]
After 3 Years rr_ExpenseExampleYear03 684
After 5 Years rr_ExpenseExampleYear05 1,174
After 10 Years rr_ExpenseExampleYear10 $ 2,331
1 Year rr_AverageAnnualReturnYear01 4.30%
5 Years rr_AverageAnnualReturnYear05 5.79%
10 Years rr_AverageAnnualReturnYear10 3.70%
AB GLOBAL RISK ALLOCATION FUND, INC. | 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 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.15%
Interest Expense rr_Component2OtherExpensesOverAssets 0.01%
Other Expenses rr_Component3OtherExpensesOverAssets 0.39%
Total Other Expenses rr_OtherExpensesOverAssets 0.55%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.18%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.17%
After 1 Year rr_ExpenseExampleYear01 $ 119
After 3 Years rr_ExpenseExampleYear03 374
After 5 Years rr_ExpenseExampleYear05 648
After 10 Years rr_ExpenseExampleYear10 $ 1,431
1 Year rr_AverageAnnualReturnYear01 6.41%
5 Years rr_AverageAnnualReturnYear05 6.87%
10 Years rr_AverageAnnualReturnYear10 4.75%
AB GLOBAL RISK ALLOCATION FUND, INC. | Class R  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [6]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOther none [6]
Exchange Fee rr_ExchangeFeeOverRedemption none [6]
Management Fees rr_ManagementFeesOverAssets 0.60% [6],[7]
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50% [6],[7]
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.27% [6],[7]
Interest Expense rr_Component2OtherExpensesOverAssets 0.01% [6],[7]
Other Expenses rr_Component3OtherExpensesOverAssets 0.38% [6],[7]
Total Other Expenses rr_OtherExpensesOverAssets 0.66% [6],[7]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [6],[7]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.79% [6],[7]
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2],[6],[7]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.78% [6],[7]
After 1 Year rr_ExpenseExampleYear01 $ 181
After 3 Years rr_ExpenseExampleYear03 562
After 5 Years rr_ExpenseExampleYear05 969
After 10 Years rr_ExpenseExampleYear10 $ 2,104
1 Year rr_AverageAnnualReturnYear01 8.64%
5 Years rr_AverageAnnualReturnYear05 6.80%
10 Years rr_AverageAnnualReturnYear10 4.42%
AB GLOBAL RISK ALLOCATION FUND, INC. | Class K  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [6]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOther none [6]
Exchange Fee rr_ExchangeFeeOverRedemption none [6]
Management Fees rr_ManagementFeesOverAssets 0.60% [6]
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25% [6]
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.45% [6]
Interest Expense rr_Component2OtherExpensesOverAssets 0.01% [6]
Other Expenses rr_Component3OtherExpensesOverAssets 0.39% [6]
Total Other Expenses rr_OtherExpensesOverAssets 0.85% [6]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [6]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.73% [6]
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2],[6]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.72% [6]
After 1 Year rr_ExpenseExampleYear01 $ 175
After 3 Years rr_ExpenseExampleYear03 544
After 5 Years rr_ExpenseExampleYear05 938
After 10 Years rr_ExpenseExampleYear10 $ 2,040
1 Year rr_AverageAnnualReturnYear01 6.07%
5 Years rr_AverageAnnualReturnYear05 6.54%
10 Years rr_AverageAnnualReturnYear10 4.45%
AB GLOBAL RISK ALLOCATION FUND, INC. | Class I  
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 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses: Transfer Agent rr_Component1OtherExpensesOverAssets 0.15%
Interest Expense rr_Component2OtherExpensesOverAssets 0.01%
Other Expenses rr_Component3OtherExpensesOverAssets 0.38%
Total Other Expenses rr_OtherExpensesOverAssets 0.54%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.17%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.16%
After 1 Year rr_ExpenseExampleYear01 $ 118
After 3 Years rr_ExpenseExampleYear03 371
After 5 Years rr_ExpenseExampleYear05 643
After 10 Years rr_ExpenseExampleYear10 $ 1,419
1 Year rr_AverageAnnualReturnYear01 6.39%
5 Years rr_AverageAnnualReturnYear05 6.90%
10 Years rr_AverageAnnualReturnYear10 4.84%
AB GLOBAL RISK ALLOCATION FUND, INC. | Return After Taxes on Distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.18% [3]
5 Years rr_AverageAnnualReturnYear05 3.93% [3]
10 Years rr_AverageAnnualReturnYear10 2.42% [3]
AB GLOBAL RISK ALLOCATION FUND, INC. | Return After Taxes on Distributions and Sale of Fund Shares | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.12% [3]
5 Years rr_AverageAnnualReturnYear05 3.78% [3]
10 Years rr_AverageAnnualReturnYear10 2.50% [3]
AB GLOBAL RISK ALLOCATION FUND, INC. | MSCI World Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 23.79%
5 Years rr_AverageAnnualReturnYear05 12.80%
10 Years rr_AverageAnnualReturnYear10 8.60%
AB GLOBAL RISK ALLOCATION FUND, INC. | Bloomberg Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.72% [8]
5 Years rr_AverageAnnualReturnYear05 (0.32%) [8]
10 Years rr_AverageAnnualReturnYear10 0.38% [8]
AB GLOBAL RISK ALLOCATION FUND, INC. | 60% MSCI World Index/40% Bloomberg Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.33% [8]
5 Years rr_AverageAnnualReturnYear05 7.65% [8]
10 Years rr_AverageAnnualReturnYear10 5.46% [8]
[1]
Purchases of Class A shares in amounts of $1,000,000 or more, or by certain group retirement plans, may be subject to a 1%, 1-year contingent deferred sales charge, or CDSC, which may be subject to waiver in certain circumstances.
[2]
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”. The agreement will remain in effect until February 28, 2025 and may only be terminated or changed with the consent of the Fund’s Board of Directors. In addition, the agreement will be automatically extended for one-year terms unless the Adviser provides notice of termination to the Fund at least 60 days prior to the end of the period.
[3] After-tax returns: – Are shown for Class A shares only and will vary for the 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]
Class R shares and Class K shares are no longer offered to new investors. Outstanding Class R shares and Class K shares will be liquidated on or about May 21, 2024.
[7]
Restated to reflect current fees, which excludes a one‑time non‑recurring accrual adjustment reflected in the 2023 Financial Highlights.
[8]
The information for the Bloomberg Global Aggregate Bond Index and for the composite index is presented to show how the Fund’s performance compares with the returns of indices of securities similar to those in which the Fund invests.