485BPOS

As filed with the Securities and Exchange Commission on July 12, 2013

File No. 2-29901

811-01716

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF l933

Pre-Effective Amendment No.

Post-Effective Amendment No. 135 x

and/or

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF l940

Amendment No. 114 x

ALLIANCEBERNSTEIN CAP FUND, INC.

(Exact Name of Registrant as Specified in Charter)

1345 Avenue of the Americas, New York, New York l0105

(Address of Principal Executive Office) (Zip Code)

Registrant’s Telephone Number, including Area Code:

(800) 221-5672

EMILIE D. WRAPP

AllianceBernstein L.P.

1345 Avenue of the Americas

New York, New York l0105

(Name and address of agent for service)

Copies of communications to:

Kathleen K. Clarke

Seward & Kissel LLP

901 K Street, NW

Suite 800

Washington, DC 20001

It is proposed that this filing will become effective (check appropriate box):

¨ immediately upon filing pursuant to paragraph (b)

x on July 12, 2013 pursuant to paragraph (b)

¨ 60 days after filing pursuant to paragraph (a)(1)

¨ on (date) pursuant to paragraph (a)(1)

¨ 75 days after filing pursuant to paragraph (a)(2)

¨ on (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

¨ This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

This Post-Effective Amendment No. 135 relates solely to the Class A, Class C, Advisor Class, Class R, Class K Class I, Class 1 and Class 2 shares, as applicable, of the AllianceBernstein Dynamic All Market Fund. No information in the Registrant’s Registration Statement relating to the Class A, Class B, Class C, Class R, Class K, Class I and Advisor Class shares, as applicable, of the AllianceBernstein Small Cap Growth Portfolio, the Class A, Class C, Class R, Class K, Class I and Advisor Class shares, as applicable, of the AllianceBernstein U.S. Strategic Research Portfolio, the Class A, Class C, Class R, Class K, Class I and Advisor Class shares, as applicable, of the AllianceBernstein Market Neutral Strategy – U.S., the Class A, Class C, Class R, Class K, Class I and Advisor Class shares, as applicable, of the AllianceBernstein Market Neutral Strategy – Global, the Class A, Class C, Advisor Class, Class R, Class K and Class I shares, as applicable, of the AllianceBernstein International Discovery Equity Portfolio, the Class A, Class C, Advisor Class, Class R, Class K and Class I shares, as applicable, of the AllianceBernstein International Focus 40 Portfolio, the Class A, Class C, Advisor Class, Class R, Class K, Class I, Class 1 and Class 2 shares, as applicable, of the AllianceBernstein Emerging Markets Multi-Asset Portfolio, the Class A, Class C, Advisor Class, Class R, Class K, Class I, Class 1 and Class 2 shares, as applicable, of the AllianceBernstein Dynamic All Market Plus Fund, the Class A, Class C, Advisor Class,
Class R, Class K, Class I, Class 1 and Class 2 shares, as applicable, of the AllianceBernstein Select US Equity Portfolio and Class A,
Class C, Advisor Class, Class R, Class K, Class I, Class 1 and Class 2 shares, as applicable, of the AllianceBernstein Emerging Markets Equity Portfolio is amended or superseded.

SIGNATURE

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Amendment to its Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City and State of New York, on the 12^th day of July, 2013.

ALLIANCEBERNSTEIN CAP FUND, INC.
By:	Robert M. Keith *
	Robert M. Keith
	President

Pursuant to the requirements of the Securities Act of l933, as amended, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

	Signature	Title	Date
(1)	Principal Executive Officer:
	Robert M. Keith * Robert M. Keith	President and Chief Executive Officer	July 12, 2013
(2)	Principal Financial and Accounting Officer:
	/s/ Joseph J. Mantineo      Joseph J. Mantineo	Treasurer and Chief Financial Officer	July 12, 2013
(3)	All of the Directors:
	John H. Dobkin*
	Michael J. Downey*
	William H. Foulk, Jr.*
	D. James Guzy*
	Nancy P. Jacklin*
	Robert M. Keith*
	Garry L. Moody*
	Marshall C. Turner, Jr.*
	Earl D. Weiner*

*By: /s/ Stephen J. Laffey Stephen J. Laffey     (Attorney-in-fact) July 12, 2013

SIGNATURE

This Registration Statement contains certain disclosure regarding AllianceBernstein Dynamic All Market (Cayman) Ltd. (the “Subsidiary”). The Subsidiary has, subject to the next sentence, duly caused this Registration Statement on Form N-1A of AllianceBernstein Cap Fund, Inc. (the “Registrant”) to be signed on behalf by the undersigned, thereunto duly authorized, in the City of New York in the State of New York on the 12^th day of July, 2013. The Subsidiary is executing this Registration Statement only in respect of the disclosure contained herein specifically describing the Subsidiary and hereby disclaims any responsibility or liability as to any other disclosures in this Registration Statement.

ALLIANCEBERNSTEIN DYNAMIC ALL MARKET (CAYMAN) LTD.
	By:	Robert M. Keith *
		Robert M. Keith
		President

This Registration Statement on Form N-1A of the Registrant has been signed below by the following persons, solely in the capacities indicated and subject to the next sentence on July 12, 2013. Each of the following persons is signing this Registration Statement only in respect of the disclosures contained herein specifically describing the Subsidiary and hereby disclaims any responsibility or liability as to any other disclosures in this Registration Statement.

	Signature	Title	Date
(1)	Principal Executive Officer:
	Robert M. Keith * Robert M. Keith	President and Chief Executive Officer	July 12, 2013
(2)	Principal Financial and Accounting Officer:
	/s/ Joseph J. Mantineo     Joseph J. Mantineo	Treasurer and Chief Financial Officer	July 12, 2013
(3)	All of the Directors:
	William H. Foulk, Jr.*
	Robert M. Keith*
	Marshall C. Turner, Jr.*

*By:	/s/ Stephen J. Laffey	July 12, 2013
	Stephen J. Laffey     (Attorney-in-fact)

Index to Exhibits

Exhibit No.	Description of Exhibits
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CALC	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	ALLIANCEBERNSTEIN CAP FUND, INC.
Prospectus Date	rr_ProspectusDate	Jul. 01, 2013
Institutional Shares | AllianceBernstein Dynamic All Market Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	SUMMARY INFORMATION ALLIANCEBERNSTEIN DYNAMIC ALL MARKET FUND
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund's investment objective is to maximize total return consistent with the Adviser's determination of reasonable risk. Total return is the sum of capital appreciation and income.
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 and hold shares of the Fund.
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, 2015
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 127% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	127.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]	rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees	Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not match the expense ratios included in the Financial Highlights table below, as the Financial Highlights tables do not include Acquired Fund Fees and Expenses.
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. The Examples also assume that your investment has a 5% return each year, that the Fund's operating expenses stay the same and that the fee waiver remains in effect as agreed upon. 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, fixed-income, real assets, credit and currencies. In making asset allocation decisions, the Adviser will use fundamental and quantitative analysis and its proprietary dynamic asset allocation process. This process generates forecasts of volatility, correlation and expected return that allow the Adviser to gauge changes in the risk/return trade-off across a range of asset classes. The Adviser may make frequent adjustments to the Fund's asset class exposures based on this continued monitoring of risks and potential returns. In addition, the Adviser will seek to allocate the Fund's investments such that the Fund's asset classes contribute to its overall expected risk and volatility in a more balanced manner than is typical in a portfolio with approximately equal allocations to equity and fixed-income securities, where volatility often can be attributed largely to equities. This means that the Fund will generally have greater exposures to lower risk asset classes (such as fixed-income) than to higher risk asset classes. In addition to these risk considerations, the Adviser will consider its forecasts for return as well as risk in making asset allocation decisions. To achieve the overall risk/return profile that the Adviser believes is most appropriate in light of the Fund's investment objective, a combination of direct securities investments, derivative instruments and reverse repurchase agreements will be used to gain asset class exposure so that the Fund's aggregate exposure will generally be substantially in excess of its net assets (i.e., so that the Fund is effectively leveraged). The asset classes in which the Fund may invest include: equity (generally large-capitalization equity securities and related derivatives; also small- and mid-capitalization equity securities and related derivatives to a lesser degree); fixed-income (sovereign debt obligations; interest rate derivatives); credit (corporate debt securities, including high-yield debt securities or "junk bonds", and credit derivatives such as credit default swaps); real assets, including: commodities, commodity-linked derivative instruments, including futures and options thereon, and companies engaged in commodity businesses; real estate investment trusts ("REITs") and other real estate-related securities; inflation-linked securities and related derivatives; and currencies. The Fund's investments within each asset class will generally be index-based--i.e., portfolios of securities intended to track the performance of a particular index and index-based exchange-traded funds ("ETFs") and derivatives. The Fund's investments in each asset class will generally be global in nature, and will generally include investments in both developed and emerging markets. The Fund may invest in debt securities with a range of maturities from short- to long-term. ETFs and derivatives, such as options, futures, forwards and swaps, may provide more efficient and economical exposure to market segments than direct investments, and the Fund's market exposures may at times be achieved almost entirely through investments in ETF shares and/or through the use of derivatives. Shares of ETFs and 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 invest in ETFs or to enter into derivatives transactions, the Adviser will consider factors such as the risks and returns of these investments relative to direct investments and the costs 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 significant portion of the Fund's assets may be held in cash or invested in cash equivalents, such as short-term U.S. Government and agency securities, repurchase agreements and money market funds. 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 that the Fund will seek to gain exposure to commodities and commodities-related instruments and derivatives primarily through investments in AllianceBernstein Dynamic All Market (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 will be 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 Fund's foreign currency exposures will come both from investments in equity and debt securities priced or denominated in foreign currencies and from direct holdings of 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. The Adviser may seek investment opportunities by taking long or short positions in currencies through the use of currency-related derivatives.
Risk [Heading]	rr_RiskHeading	PRINCIPAL RISKS
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	MARKET RISK: The value of the Fund's assets will fluctuate as the stock, bond, currency and commodity markets fluctuate. The value of the Fund's investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events that affect large portions of the market. ALLOCATION RISK: The allocation of the Fund's assets among different asset classes, such as equity securities, debt securities and currencies, may have a significant effect on the Fund's net asset value, or NAV, when one of these asset classes is performing better or worse than others. DERIVATIVES RISK: Derivatives may be illiquid, difficult to price, and leveraged so that small changes may produce disproportionate losses for the Fund, and may be subject to counterparty risk to a greater degree than more traditional investments. 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. 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 less liquid due to adverse market, economic, political, regulatory or other factors. EMERGING MARKET RISK: Investments in emerging market countries may have more risk because the markets are less developed and less liquid, and because these investments may be subject to increased economic, political, regulatory and other uncertainties. CURRENCY RISK: Fluctuations in currency exchange rates may negatively affect the value of the Fund's investments or reduce its returns. 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. 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, guarantor or counterparty may default, causing a loss of the full principal amount of a security or the amount to which the Fund is entitled in a derivatives transaction. 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. HIGH YIELD DEBT SECURITY 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, negative perceptions of the junk bond market generally and less secondary market liquidity. COMMODITY RISK: Investing in commodities and commodity-linked derivative instruments may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by 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. 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. REAL ESTATE RISK: The Fund's investments in real estate securities have many of the same risks as direct ownership of real estate, including the risk that the value of real estate could decline due to a variety of factors that affect the real estate market generally. Investments in REITs may have additional risks. REITs are dependent on the capability of their managers, may have limited diversification, and could be significantly affected by changes in taxes. DIVERSIFICATION RISK: The Fund may have more risk because it is "non-diversified", meaning that it can invest more of its assets in a smaller number of issuers. 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. 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.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	DIVERSIFICATION RISK: The Fund may have more risk because it is "non-diversified", meaning that it can invest more of its assets in a smaller number of issuers.
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 over the life of the Fund; and how the Fund's average annual returns for one year and over the life of the Fund compare to those of broad-based securities market indices. You may obtain updated performance information on the Fund's website at www.AllianceBernstein.com (click on "Individuals-U.S." then "Products & Performance"). 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 over the life of the Fund; and how the Fund's average annual returns for one year and over the life of the Fund compare to those of broad-based securities market indices.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.AllianceBernstein.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 1 shares and do not reflect sales loads. Through March 31, 2013, the year-to-date unannualized return for Class 1 shares was 3.82%.
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The annual returns in the bar chart are for the Fund's Class 1 shares and do not reflect sales loads.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	During the period shown in the bar chart, the Fund's: BEST QUARTER WAS UP 4.66%, 1ST QUARTER, 2012; AND WORST QUARTER WAS DOWN -2.01%, 2ND QUARTER, 2012.
Performance Table Heading	rr_PerformanceTableHeading	PERFORMANCE TABLE AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, 2012)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	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	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 1 shares only and will vary for Class 2 shares because Class 2 shares have different expense ratios;
Institutional Shares | AllianceBernstein Dynamic All Market Fund | CLASS 1 SHARES
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_MaximumDeferredSalesChargeOverOfferingPrice	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.01%
Other Expenses	rr_Component2OtherExpensesOverAssets	4.48%
Total Other Expenses	rr_OtherExpensesOverAssets	4.49%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	5.42%	[1]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(4.29%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.13%	[1]
After 1 Year	rr_ExpenseExampleYear01	115
After 3 Years	rr_ExpenseExampleYear03	831
After 5 Years	rr_ExpenseExampleYear05	2,041
After 10 Years	rr_ExpenseExampleYear10	5,021
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	115
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	831
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	2,041
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	5,021
2003	rr_AnnualReturn2003
2004	rr_AnnualReturn2004
2005	rr_AnnualReturn2005
2006	rr_AnnualReturn2006
2007	rr_AnnualReturn2007
2008	rr_AnnualReturn2008
2009	rr_AnnualReturn2009
2010	rr_AnnualReturn2010
2011	rr_AnnualReturn2011
2012	rr_AnnualReturn2012	9.29%
Year to Date Return, Label	rr_YearToDateReturnLabel	year-to-date
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Mar. 31, 2013
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	3.82%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	BEST QUARTER
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	4.66%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	WORST QUARTER
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2012
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(2.01%)
1 YEAR	rr_AverageAnnualReturnYear01	9.29%	[3]
SINCE INCEPTION	rr_AverageAnnualReturnSinceInception	10.26%	[3],[4]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[3]
Institutional Shares | AllianceBernstein Dynamic All Market Fund | CLASS 2 SHARES
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_MaximumDeferredSalesChargeOverOfferingPrice	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.01%
Other Expenses	rr_Component2OtherExpensesOverAssets	4.49%
Total Other Expenses	rr_OtherExpensesOverAssets	4.50%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	5.18%	[1]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(4.30%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.88%	[1]
After 1 Year	rr_ExpenseExampleYear01	90
After 3 Years	rr_ExpenseExampleYear03	756
After 5 Years	rr_ExpenseExampleYear05	1,924
After 10 Years	rr_ExpenseExampleYear10	4,824
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	90
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	756
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,924
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 4,824
1 YEAR	rr_AverageAnnualReturnYear01	9.65%
SINCE INCEPTION	rr_AverageAnnualReturnSinceInception	10.62%	[4]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Institutional Shares | AllianceBernstein Dynamic All Market Fund | Return after Taxes on Distributions | CLASS 1 SHARES
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	7.51%	[3]
SINCE INCEPTION	rr_AverageAnnualReturnSinceInception	8.40%	[3],[4]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[3]
Institutional Shares | AllianceBernstein Dynamic All Market Fund | Return after Taxes on Distributions and Sale of Fund Shares | CLASS 1 SHARES
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	6.12%	[3]
SINCE INCEPTION	rr_AverageAnnualReturnSinceInception	7.68%	[3],[4]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[3]
Institutional Shares | AllianceBernstein Dynamic All Market Fund | MSCI World Index (net) (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	15.83%
SINCE INCEPTION	rr_AverageAnnualReturnSinceInception	18.65%	[4]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Institutional Shares | AllianceBernstein Dynamic All Market Fund | Barclays Global Treasury Bond Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	4.49%	[5]
SINCE INCEPTION	rr_AverageAnnualReturnSinceInception	4.46%	[4],[5]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[5]
Institutional Shares | AllianceBernstein Dynamic All Market Fund | Blended Benchmark: 60% MSCI World Index (net) /40% Barclays Global Treasury Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	11.42%	[5]
SINCE INCEPTION	rr_AverageAnnualReturnSinceInception	12.99%	[4],[5]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[5]

[1] Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not match the expense ratios included in the Financial Highlights table below, as the Financial Highlights tables do not include Acquired Fund Fees and Expenses.

[2] The Adviser has contractually agreed to waive its management fees and/or to bear expenses of the Fund through February 28, 2015 to the extent necessary to prevent total Fund operating expenses, on an annualized basis, from exceeding 1.05% on Class 1 shares or 0.80% on Class 2 shares (excluding Acquired Fund Fees and Expenses other than the advisory fees of any AllianceBernstein Mutual Funds in which the Fund may invest, interest expense, brokerage commissions and other transaction costs, taxes and extraordinary expenses). Any fees waived and expenses borne by the Adviser may be reimbursed by the Fund until February 28, 2015, provided that no reimbursement payment will be made that would cause the Fund's total annual Fund operating expenses to exceed the percentages in the preceding sentence or cause the total of the payments to exceed the Fund's total initial offering expenses.

[3] After-tax returns: -Are shown for Class 1 shares only and will vary for Class 2 shares because Class 2 shares have different expense ratios; -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; 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] Since inception return is from December 16, 2011.

[5] The performance table includes an index of fixed-income securities and information about a blend of 60% MSCI World Index and 40% Barclays Global Treasury Index to show how the Fund's performance compares with other indices of securities similar to those in which the Fund invests.

XML

Institutional Shares | AllianceBernstein Dynamic All Market Fund

SUMMARY INFORMATION

ALLIANCEBERNSTEIN DYNAMIC ALL MARKET FUND

INVESTMENT OBJECTIVE

The Fund's investment objective is to maximize total return consistent with the Adviser's determination of reasonable risk. Total return is the sum of capital appreciation and income.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

SHAREHOLDER FEES (fees paid directly from your investment)

Shareholder Fees Institutional Shares AllianceBernstein Dynamic All Market Fund (USD $)	CLASS 1 SHARES	CLASS 2 SHARES
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	none	none
Exchange Fee	none	none

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage
of the value of your investment)

Annual Fund Operating Expenses Institutional Shares AllianceBernstein Dynamic All Market Fund		CLASS 1 SHARES	CLASS 2 SHARES
Management Fees		0.60%	0.60%
Distribution and/or Service (12b-1) Fees		0.25%	none
Other Expenses: Transfer Agent		0.01%	0.01%
Other Expenses		4.48%	4.49%
Total Other Expenses		4.49%	4.50%
Acquired Fund Fees and Expenses		0.08%	0.08%
Total Annual Fund Operating Expenses	[1]	5.42%	5.18%
Fee Waiver and/or Expense Reimbursement	[2]	(4.29%)	(4.30%)
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[1]	1.13%	0.88%

EXAMPLES

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. The Examples also assume that your investment has a 5% return each year, that the Fund's operating expenses stay the same and that the fee waiver remains in effect as agreed upon. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Institutional Shares AllianceBernstein Dynamic All Market Fund (USD $)	CLASS 1	CLASS 2
After 1 Year	115	90
After 3 Years	831	756
After 5 Years	2,041	1,924
After 10 Years	5,021	4,824

Expense Example, No Redemption Institutional Shares AllianceBernstein Dynamic All Market Fund (USD $)	CLASS 1	CLASS 2
After 1 Year	115	90
After 3 Years	831	756
After 5 Years	2,041	1,924
After 10 Years	5,021	4,824

PORTFOLIO TURNOVER

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 127% of the average value of its portfolio.

PRINCIPAL STRATEGIES

The Fund invests dynamically in a number of global asset classes, including equity, fixed-income, real assets, credit and currencies. In making asset allocation decisions, the Adviser will use fundamental and quantitative analysis and its proprietary dynamic asset allocation process. This process generates forecasts of volatility, correlation and expected return that allow the Adviser to gauge changes in the risk/return trade-off across a range of asset classes. The Adviser may make frequent adjustments to the Fund's asset class exposures based on this continued monitoring of risks and potential returns.

In addition, the Adviser will seek to allocate the Fund's investments such that the Fund's asset classes contribute to its overall expected risk and volatility in a more balanced manner than is typical in a portfolio with approximately equal allocations to equity and fixed-income securities, where volatility often can be attributed largely to equities. This means that the Fund will generally have greater exposures to lower risk asset classes (such as fixed-income) than to higher risk asset classes. In addition to these risk considerations, the Adviser will consider its forecasts for return as well as risk in making asset allocation decisions. To achieve the overall risk/return profile that the Adviser believes is most appropriate in light of the Fund's investment objective, a combination of direct securities investments, derivative instruments and reverse repurchase agreements will be used to gain asset class exposure so that the Fund's aggregate exposure will generally be substantially in excess of its net assets (i.e., so that the Fund is effectively leveraged).

The asset classes in which the Fund may invest include:

• equity (generally large-capitalization equity securities and related derivatives; also small- and mid-capitalization equity securities and related derivatives to a lesser degree);

• fixed-income (sovereign debt obligations; interest rate derivatives);

• credit (corporate debt securities, including high-yield debt securities or "junk bonds", and credit derivatives such as credit default swaps);

• real assets, including:

• commodities, commodity-linked derivative instruments, including futures and options thereon, and companies engaged in commodity businesses;

• real estate investment trusts ("REITs") and other real estate-related securities;

• inflation-linked securities and related derivatives; and

• currencies.

The Fund's investments within each asset class will generally be index-based--i.e., portfolios of securities intended to track the performance of a particular index and index-based exchange-traded funds ("ETFs") and derivatives. The Fund's investments in each asset class will generally be global in nature, and will generally include investments in both developed and emerging markets. The Fund may invest in debt securities with a range of maturities from short- to long-term.

ETFs and derivatives, such as options, futures, forwards and swaps, may provide more efficient and economical exposure to market segments than direct investments, and the Fund's market exposures may at times be achieved almost entirely through investments in ETF shares and/or through the use of derivatives. Shares of ETFs and 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 invest in ETFs or to enter into derivatives transactions, the Adviser will consider factors such as the risks and returns of these investments relative to direct investments and the costs 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 significant portion of the Fund's assets may be held in cash or invested in cash equivalents, such as short-term U.S. Government and agency securities, repurchase agreements and money market funds.

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 that the Fund will seek to gain exposure to commodities and commodities-related instruments and derivatives primarily through investments in AllianceBernstein Dynamic All Market (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 will be 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 Fund's foreign currency exposures will come both from investments in equity and debt securities priced or denominated in foreign currencies and from direct holdings of 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. The Adviser may seek investment opportunities by taking long or short positions in currencies through the use of currency-related derivatives.

PRINCIPAL RISKS

• MARKET RISK: The value of the Fund's assets will fluctuate as the stock, bond, currency and commodity markets fluctuate. The value of the Fund's investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events that affect large portions of the market.

• ALLOCATION RISK: The allocation of the Fund's assets among different asset classes, such as equity securities, debt securities and currencies, may have a significant effect on the Fund's net asset value, or NAV, when one of these asset classes is performing better or worse than others.

• DERIVATIVES RISK: Derivatives may be illiquid, difficult to price, and leveraged so that small changes may produce disproportionate losses for the Fund, and may be subject to counterparty risk to a greater degree than more traditional investments.

• 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.

• 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 less liquid due to adverse market, economic, political, regulatory or other factors.

• EMERGING MARKET RISK: Investments in emerging market countries may have more risk because the markets are less developed and less liquid, and because these investments may be subject to increased economic, political, regulatory and other uncertainties.

• CURRENCY RISK: Fluctuations in currency exchange rates may negatively affect the value of the Fund's investments or reduce its returns.

• 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.

• 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, guarantor or counterparty may default, causing a loss of the full principal amount of a security or the amount to which the Fund is entitled in a derivatives transaction. 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.

• HIGH YIELD DEBT SECURITY 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, negative perceptions of the junk bond market generally and less secondary market liquidity.

• COMMODITY RISK: Investing in commodities and commodity-linked derivative instruments may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by 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.

• 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.

• REAL ESTATE RISK: The Fund's investments in real estate securities have many of the same risks as direct ownership of real estate, including the risk that the value of real estate could decline due to a variety of factors that affect the real estate market generally. Investments in REITs may have additional risks. REITs are dependent on the capability of their managers, may have limited diversification, and could be significantly affected by changes in taxes.

• DIVERSIFICATION RISK: The Fund may have more risk because it is "non-diversified", meaning that it can invest more of its assets in a smaller number of issuers.

• 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.

As with all investments, you may lose money by investing in the Fund.

BAR CHART AND PERFORMANCE INFORMATION

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 over the life of the Fund; and

• how the Fund's average annual returns for one year and over the life of the Fund compare to those of broad-based securities market indices.

You may obtain updated performance information on the Fund's website at www.AllianceBernstein.com (click on "Individuals-U.S." then "Products & Performance").

The Fund's past performance before and after taxes, of course, does not necessarily indicate how it will perform in the future.

BAR CHART

The annual returns in the bar chart are for the Fund's Class 1 shares and do not reflect sales loads. Through March 31, 2013, the year-to-date unannualized return for Class 1 shares was 3.82%.

During the period shown in the bar chart, the Fund's:

BEST QUARTER WAS UP 4.66%, 1ST QUARTER, 2012; AND WORST QUARTER WAS DOWN -2.01%, 2ND QUARTER, 2012.

PERFORMANCE TABLE
AVERAGE ANNUAL TOTAL RETURNS
(For the periods ended December 31, 2012)

Average Annual Total Returns Institutional Shares AllianceBernstein Dynamic All Market Fund		1 YEAR	SINCE INCEPTION		INCEPTION DATE
CLASS 1	[1]	9.29%	10.26%	[2]	Dec. 16, 2011
CLASS 1 Return after Taxes on Distributions	[1]	7.51%	8.40%	[2]	Dec. 16, 2011
CLASS 1 Return after Taxes on Distributions and Sale of Fund Shares	[1]	6.12%	7.68%	[2]	Dec. 16, 2011
CLASS 2		9.65%	10.62%	[2]	Dec. 16, 2011
MSCI World Index (net) (reflects no deduction for fees, expenses, or taxes)		15.83%	18.65%	[2]	Dec. 16, 2011
Barclays Global Treasury Bond Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)	[3]	4.49%	4.46%	[2]	Dec. 16, 2011
Blended Benchmark: 60% MSCI World Index (net) /40% Barclays Global Treasury Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)	[3]	11.42%	12.99%	[2]	Dec. 16, 2011

[1] Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not match the expense ratios included in the Financial Highlights table below, as the Financial Highlights tables do not include Acquired Fund Fees and Expenses.

[2] The Adviser has contractually agreed to waive its management fees and/or to bear expenses of the Fund through February 28, 2015 to the extent necessary to prevent total Fund operating expenses, on an annualized basis, from exceeding 1.05% on Class 1 shares or 0.80% on Class 2 shares (excluding Acquired Fund Fees and Expenses other than the advisory fees of any AllianceBernstein Mutual Funds in which the Fund may invest, interest expense, brokerage commissions and other transaction costs, taxes and extraordinary expenses). Any fees waived and expenses borne by the Adviser may be reimbursed by the Fund until February 28, 2015, provided that no reimbursement payment will be made that would cause the Fund's total annual Fund operating expenses to exceed the percentages in the preceding sentence or cause the total of the payments to exceed the Fund's total initial offering expenses.

[1] After-tax returns: -Are shown for Class 1 shares only and will vary for Class 2 shares because Class 2 shares have different expense ratios; -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; 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.

[2] Since inception return is from December 16, 2011.

[3] The performance table includes an index of fixed-income securities and information about a blend of 60% MSCI World Index and 40% Barclays Global Treasury Index to show how the Fund's performance compares with other indices of securities similar to those in which the Fund invests.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	ALLIANCEBERNSTEIN CAP FUND, INC.
Prospectus Date	rr_ProspectusDate	Jul. 01, 2013
Document Creation Date	dei_DocumentCreationDate	Jun. 27, 2013

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	ALLIANCEBERNSTEIN CAP FUND, INC.
Prospectus Date	rr_ProspectusDate	Jul. 01, 2013
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	SUMMARY INFORMATION ALLIANCEBERNSTEIN DYNAMIC ALL MARKET FUND
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund's investment objective is to maximize total return consistent with the Adviser's determination of reasonable risk. Total return is the sum of capital appreciation and income.
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 and hold shares of the Fund. 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 AllianceBernstein Mutual Funds. More information about these and other discounts is available from your financial intermediary and in Investing in the Fund--Sales Charge Reduction Programs for Class A Shares on page 25 of this Prospectus and in Purchase of Shares--Sales Charge Reduction Programs for Class A Shares on page 82 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, 2015
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 127% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	127.00%
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.
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 AllianceBernstein Mutual Funds.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 100,000
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]	rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees	Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not match the expense ratios included in the Financial Highlights table below, as the Financial Highlights tables do not include Acquired Fund Fees and Expenses.
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. The Examples also assume that your investment has a 5% return each year, that the Fund's operating expenses stay the same and that the fee waiver remains in effect as agreed upon. 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, fixed-income, real assets, credit and currencies. In making asset allocation decisions, the Adviser will use fundamental and quantitative analysis and its proprietary dynamic asset allocation process. This process generates forecasts of volatility, correlation and expected return that allow the Adviser to gauge changes in the risk/return trade-off across a range of asset classes. The Adviser may make frequent adjustments to the Fund's asset class exposures based on this continued monitoring of risks and potential returns. In addition, the Adviser will seek to allocate the Fund's investments such that the Fund's asset classes contribute to its overall expected risk and volatility in a more balanced manner than is typical in a portfolio with approximately equal allocations to equity and fixed-income securities, where volatility often can be attributed largely to equities. This means that the Fund will generally have greater exposures to lower risk asset classes (such as fixed-income) than to higher risk asset classes. In addition to these risk considerations, the Adviser will consider its forecasts for return as well as risk in making asset allocation decisions. To achieve the overall risk/return profile that the Adviser believes is most appropriate in light of the Fund's investment objective, a combination of direct securities investments, derivative instruments and reverse repurchase agreements will be used to gain asset class exposure so that the Fund's aggregate exposure will generally be substantially in excess of its net assets (i.e., so that the Fund is effectively leveraged). The asset classes in which the Fund may invest include: equity (generally large-capitalization equity securities and related derivatives; also small- and mid-capitalization equity securities and related derivatives to a lesser degree); fixed-income (sovereign debt obligations; interest rate derivatives); credit (corporate debt securities, including high-yield debt securities or "junk bonds", and credit derivatives such as credit default swaps); real assets, including: commodities, commodity-linked derivative instruments, including futures and options thereon, and companies engaged in commodity businesses; real estate investment trusts ("REITs") and other real estate-related securities; inflation-linked securities and related derivatives; and currencies. The Fund's investments within each asset class will generally be index-based--i.e., portfolios of securities intended to track the performance of a particular index and index-based exchange-traded funds ("ETFs") and derivatives. The Fund's investments in each asset class will generally be global in nature, and will generally include investments in both developed and emerging markets. The Fund may invest in debt securities with a range of maturities from short- to long-term. ETFs and derivatives, such as options, futures, forwards and swaps, may provide more efficient and economical exposure to market segments than direct investments, and the Fund's market exposures may at times be achieved almost entirely through investments in ETF shares and/or through the use of derivatives. Shares of ETFs and 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 invest in ETFs or to enter into derivatives transactions, the Adviser will consider factors such as the risks and returns of these investments relative to direct investments and the costs 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 significant portion of the Fund's assets may be held in cash or invested in cash equivalents, such as short-term U.S. Government and agency securities, repurchase agreements and money market funds. 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 that the Fund will seek to gain exposure to commodities and commodities-related instruments and derivatives primarily through investments in AllianceBernstein Dynamic All Market (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 will be 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 Fund's foreign currency exposures will come both from investments in equity and debt securities priced or denominated in foreign currencies and from direct holdings of 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. The Adviser may seek investment opportunities by taking long or short positions in currencies through the use of currency-related derivatives.
Risk [Heading]	rr_RiskHeading	PRINCIPAL RISKS
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	Market Risk: The value of the Fund's assets will fluctuate as the stock, bond, currency and commodity markets fluctuate. The value of the Fund's investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events that affect large portions of the market. Allocation Risk: The allocation of the Fund's assets among different asset classes, such as equity securities, debt securities and currencies, may have a significant effect on the Fund's net asset value, or NAV, when one of these asset classes is performing better or worse than others. Derivatives Risk: Derivatives may be illiquid, difficult to price, and leveraged so that small changes may produce disproportionate losses for the Fund, and may be subject to counterparty risk to a greater degree than more traditional investments. 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. 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 less liquid due to adverse market, economic, political, regulatory or other factors. Emerging Market Risk: Investments in emerging market countries may have more risk because the markets are less developed and less liquid, and because these investments may be subject to increased economic, political, regulatory and other uncertainties. Currency Risk: Fluctuations in currency exchange rates may negatively affect the value of the Fund's investments or reduce its returns. 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. 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, guarantor or counterparty may default causing a loss of the full principal amount of a security or the amount to which the Fund is entitled in a derivatives transaction. 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. High Yield Debt Security 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, negative perceptions of the junk bond market generally and less secondary market liquidity. Commodity Risk: Investing in commodities and commodity-linked derivative instruments may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by 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. 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. Real Estate Risk: The Fund's investments in real estate securities have many of the same risks as direct ownership of real estate, including the risk that the value of real estate could decline due to a variety of factors that affect the real estate market generally. Investments in REITs may have additional risks. REITs are dependent on the capability of their managers, may have limited diversification, and could be significantly affected by changes in taxes. Diversification Risk: The Fund may have more risk because it is "non-diversified", meaning that it can invest more of its assets in a smaller number of issuers. 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. 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.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	Diversification Risk: The Fund may have more risk because it is "non-diversified", meaning that it can invest more of its assets in a smaller number of issuers.
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 over the life of the Fund; and how the Fund's average annual returns for one year and over the life of the Fund compare to those of broad-based securities market indices. You may obtain updated performance information on the Fund's website at www.AllianceBernstein.com (click on "Individuals--U.S." then "Products & Performance"). 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 over the life of the Fund; and how the Fund's average annual returns for one year and over the life of the Fund compare to those of broad-based securities market indices.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.AllianceBernstein.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 March 31, 2013, the year-to-date unannualized return for Class A shares was 3.83%.
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 4.64%, 1st quarter, 2012; and Worst Quarter was down -1.99%, 2nd quarter, 2012.
Performance Table Heading	rr_PerformanceTableHeading	Performance Table Average Annual Total Returns (For the periods ended December 31, 2012)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	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	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 Class C and Advisor Class shares because these Classes have different expense ratios;
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Class A Shares
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_MaximumDeferredSalesChargeOverOfferingPrice	none	[1]
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.30%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	1.63%
Other Expenses	rr_Component2OtherExpensesOverAssets	3.91%
Total Other Expenses	rr_OtherExpensesOverAssets	5.54%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	6.52%	[2]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(5.34%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.18%	[2]
After 1 Year	rr_ExpenseExampleYear01	540
After 3 Years	rr_ExpenseExampleYear03	1,345
After 5 Years	rr_ExpenseExampleYear05	2,721
After 10 Years	rr_ExpenseExampleYear10	5,983
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	540
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	1,345
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	2,721
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	5,983
2003	rr_AnnualReturn2003
2004	rr_AnnualReturn2004
2005	rr_AnnualReturn2005
2006	rr_AnnualReturn2006
2007	rr_AnnualReturn2007
2008	rr_AnnualReturn2008
2009	rr_AnnualReturn2009
2010	rr_AnnualReturn2010
2011	rr_AnnualReturn2011
2012	rr_AnnualReturn2012	9.25%
Year to Date Return, Label	rr_YearToDateReturnLabel	year-to-date
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Mar. 31, 2013
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	3.83%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	4.64%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2012
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(1.99%)
1 Year	rr_AverageAnnualReturnYear01	4.60%	[4]
Since Inception	rr_AverageAnnualReturnSinceInception	5.76%	[4],[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[4]
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Class C Shares
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_MaximumDeferredSalesChargeOverOfferingPrice	1.00%	[6]
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	1.98%
Other Expenses	rr_Component2OtherExpensesOverAssets	4.65%
Total Other Expenses	rr_OtherExpensesOverAssets	6.63%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	8.31%	[2]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(6.43%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.88%	[2]
After 1 Year	rr_ExpenseExampleYear01	291	[7]
After 3 Years	rr_ExpenseExampleYear03	1,285
After 5 Years	rr_ExpenseExampleYear05	3,048
After 10 Years	rr_ExpenseExampleYear10	6,969
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	291
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	1,285
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	3,048
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	6,969
1 Year	rr_AverageAnnualReturnYear01	7.49%
Since Inception	rr_AverageAnnualReturnSinceInception	9.50%	[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Advisor Class Shares
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_MaximumDeferredSalesChargeOverOfferingPrice	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	1.60%
Other Expenses	rr_Component2OtherExpensesOverAssets	4.40%
Total Other Expenses	rr_OtherExpensesOverAssets	6.00%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	6.68%	[2]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(5.80%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.88%	[2]
After 1 Year	rr_ExpenseExampleYear01	90
After 3 Years	rr_ExpenseExampleYear03	922
After 5 Years	rr_ExpenseExampleYear05	2,405
After 10 Years	rr_ExpenseExampleYear10	5,900
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	90
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	922
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	2,405
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	5,900
1 Year	rr_AverageAnnualReturnYear01	9.60%
Since Inception	rr_AverageAnnualReturnSinceInception	10.57%	[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Class R Shares
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_MaximumDeferredSalesChargeOverOfferingPrice	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.07%
Other Expenses	rr_Component2OtherExpensesOverAssets	4.49%
Total Other Expenses	rr_OtherExpensesOverAssets	4.56%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	5.74%	[2]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(4.36%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.38%	[2]
After 1 Year	rr_ExpenseExampleYear01	140
After 3 Years	rr_ExpenseExampleYear03	914
After 5 Years	rr_ExpenseExampleYear05	2,181
After 10 Years	rr_ExpenseExampleYear10	5,270
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	140
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	914
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	2,181
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	5,270
1 Year	rr_AverageAnnualReturnYear01	9.05%
Since Inception	rr_AverageAnnualReturnSinceInception	10.02%	[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Class K Shares
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_MaximumDeferredSalesChargeOverOfferingPrice	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.03%
Other Expenses	rr_Component2OtherExpensesOverAssets	4.49%
Total Other Expenses	rr_OtherExpensesOverAssets	4.52%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	5.45%	[2]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(4.32%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.13%	[2]
After 1 Year	rr_ExpenseExampleYear01	115
After 3 Years	rr_ExpenseExampleYear03	834
After 5 Years	rr_ExpenseExampleYear05	2,050
After 10 Years	rr_ExpenseExampleYear10	5,043
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	115
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	834
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	2,050
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	5,043
1 Year	rr_AverageAnnualReturnYear01	9.36%
Since Inception	rr_AverageAnnualReturnSinceInception	10.33%	[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Class I Shares
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_MaximumDeferredSalesChargeOverOfferingPrice	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.60%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.02%
Other Expenses	rr_Component2OtherExpensesOverAssets	4.50%
Total Other Expenses	rr_OtherExpensesOverAssets	4.52%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.08%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	5.20%	[2]
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(4.32%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.88%	[2]
After 1 Year	rr_ExpenseExampleYear01	90
After 3 Years	rr_ExpenseExampleYear03	759
After 5 Years	rr_ExpenseExampleYear05	1,930
After 10 Years	rr_ExpenseExampleYear10	4,839
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	90
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	759
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,930
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 4,839
1 Year	rr_AverageAnnualReturnYear01	9.64%
Since Inception	rr_AverageAnnualReturnSinceInception	10.62%	[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Return After Taxes on Distributions | Class A Shares
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	3.51%	[4]
Since Inception	rr_AverageAnnualReturnSinceInception	4.70%	[4],[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[4]
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class A Shares
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	3.06%	[4]
Since Inception	rr_AverageAnnualReturnSinceInception	4.31%	[4],[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[4]
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | MSCI World Index (net) (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	15.83%
Since Inception	rr_AverageAnnualReturnSinceInception	18.65%	[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Barclays Global Treasury Bond Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	4.49%	[8]
Since Inception	rr_AverageAnnualReturnSinceInception	4.46%	[5],[8]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[8]
Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund | Blended Benchmark: 60% MSCI World Index (net) /40% Barclays Global Treasury Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	11.42%	[8]
Since Inception	rr_AverageAnnualReturnSinceInception	12.99%	[5],[8]
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 16, 2011	[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] Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not match the expense ratios included in the Financial Highlights table below, as the Financial Highlights tables do not include Acquired Fund Fees and Expenses.

[3] The Adviser has agreed to waive its management fees and/or to bear expenses of the Fund through February 28, 2015 to the extent necessary to prevent total Fund operating expenses, on an annualized basis, from exceeding 1.10% on Class A shares, 1.80% on Class C shares, 0.80% on Advisor Class shares, 1.30% on Class R shares, 1.05% on Class K shares, or 0.80% on Class I shares (excluding Acquired Fund Fees and Expenses other than the advisory fees of any AllianceBernstein Mutual Funds in which the Fund may invest, interest expense, brokerage commissions and other transaction costs, taxes and extraordinary expenses). Any fees waived and expenses borne by the Adviser may be reimbursed by the Fund until February 28, 2015, provided that no reimbursement payment will be made that would cause the Fund's total annual Fund operating expenses to exceed the percentages in the preceding sentence or cause the total of the payments to exceed the Fund's total initial offering expenses.

[4] After-tax returns: -Are shown for Class A shares only and will vary for Class C and Advisor Class shares because these Classes have different expense ratios; -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; 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.

[5] Since inception return is from December 16, 2011.

[6] For Class C shares, the CDSC is 0% after the first year.

[7] Assuming redemption at the end of the period, a 1% CDSC would increase the expenses by approximately $100.

[8] The performance table includes an index of fixed-income securities and information about a blend of 60% MSCI World Index and 40% Barclays Global Treasury Index to show how the Fund's performance compares with other indices of securities similar to those in which the Fund invests.

XML

Retail and Retirement Shares | AllianceBernstein Dynamic All Market Fund

SUMMARY INFORMATION

ALLIANCEBERNSTEIN DYNAMIC ALL MARKET FUND

INVESTMENT OBJECTIVE

The Fund's investment objective is to maximize total return consistent with the Adviser's determination of reasonable risk. Total return is the sum of capital appreciation and income.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 AllianceBernstein Mutual Funds. More information about these and other discounts is available from your financial intermediary and in Investing in the Fund--Sales Charge Reduction Programs for Class A Shares on page 25 of this Prospectus and in Purchase of Shares--Sales Charge Reduction Programs for Class A Shares on page 82 of the Fund's Statement of Additional Information ("SAI").

SHAREHOLDER FEES (fees paid directly from your investment)

Shareholder Fees Retail and Retirement Shares AllianceBernstein Dynamic All Market Fund (USD $)	Class A Shares		Class C Shares		Advisor Class Shares	Class R Shares	Class K Shares	Class I Shares
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	4.25%		none		none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	none	[1]	1.00%	[2]	none	none	none	none
Exchange Fee	none		none		none	none	none	none

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage
of the value of your investment)

Annual Fund Operating Expenses Retail and Retirement Shares AllianceBernstein Dynamic All Market Fund		Class A Shares	Class C Shares	Advisor Class Shares	Class R Shares	Class K Shares	Class I Shares
Management Fees		0.60%	0.60%	0.60%	0.60%	0.60%	0.60%
Distribution and/or Service (12b-1) Fees		0.30%	1.00%	none	0.50%	0.25%	none
Other Expenses: Transfer Agent		1.63%	1.98%	1.60%	0.07%	0.03%	0.02%
Other Expenses		3.91%	4.65%	4.40%	4.49%	4.49%	4.50%
Total Other Expenses		5.54%	6.63%	6.00%	4.56%	4.52%	4.52%
Acquired Fund Fees and Expenses		0.08%	0.08%	0.08%	0.08%	0.08%	0.08%
Total Annual Fund Operating Expenses	[1]	6.52%	8.31%	6.68%	5.74%	5.45%	5.20%
Fee Waiver and/or Expense Reimbursement	[2]	(5.34%)	(6.43%)	(5.80%)	(4.36%)	(4.32%)	(4.32%)
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[1]	1.18%	1.88%	0.88%	1.38%	1.13%	0.88%

EXAMPLES

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. The Examples also assume that your investment has a 5% return each year, that the Fund's operating expenses stay the same and that the fee waiver remains in effect as agreed upon. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Retail and Retirement Shares AllianceBernstein Dynamic All Market Fund (USD $)	Class A	Class C		Advisor Class	Class R	Class K	Class I
After 1 Year	540	291	[1]	90	140	115	90
After 3 Years	1,345	1,285		922	914	834	759
After 5 Years	2,721	3,048		2,405	2,181	2,050	1,930
After 10 Years	5,983	6,969		5,900	5,270	5,043	4,839

Expense Example, No Redemption Retail and Retirement Shares AllianceBernstein Dynamic All Market Fund (USD $)	Class A	Class C	Advisor Class	Class R	Class K	Class I
After 1 Year	540	291	90	140	115	90
After 3 Years	1,345	1,285	922	914	834	759
After 5 Years	2,721	3,048	2,405	2,181	2,050	1,930
After 10 Years	5,983	6,969	5,900	5,270	5,043	4,839

PORTFOLIO TURNOVER

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 127% of the average value of its portfolio.

PRINCIPAL STRATEGIES

The Fund invests dynamically in a number of global asset classes, including equity, fixed-income, real assets, credit and currencies. In making asset allocation decisions, the Adviser will use fundamental and quantitative analysis and its proprietary dynamic asset allocation process. This process generates forecasts of volatility, correlation and expected return that allow the Adviser to gauge changes in the risk/return trade-off across a range of asset classes. The Adviser may make frequent adjustments to the Fund's asset class exposures based on this continued monitoring of risks and potential returns.

In addition, the Adviser will seek to allocate the Fund's investments such that the Fund's asset classes contribute to its overall expected risk and volatility in a more balanced manner than is typical in a portfolio with approximately equal allocations to equity and fixed-income securities, where volatility often can be attributed largely to equities. This means that the Fund will generally have greater exposures to lower risk asset classes (such as fixed-income) than to higher risk asset classes. In addition to these risk considerations, the Adviser will consider its forecasts for return as well as risk in making asset allocation decisions. To achieve the overall risk/return profile that the Adviser believes is most appropriate in light of the Fund's investment objective, a combination of direct securities investments, derivative instruments and reverse repurchase agreements will be used to gain asset class exposure so that the Fund's aggregate exposure will generally be substantially in excess of its net assets (i.e., so that the Fund is effectively leveraged).

The asset classes in which the Fund may invest include:

• equity (generally large-capitalization equity securities and related derivatives; also small- and mid-capitalization equity securities and related derivatives to a lesser degree);

• fixed-income (sovereign debt obligations; interest rate derivatives);

• credit (corporate debt securities, including high-yield debt securities or "junk bonds", and credit derivatives such as credit default swaps);

• real assets, including:

• commodities, commodity-linked derivative instruments, including futures and options thereon, and companies engaged in commodity businesses;

• real estate investment trusts ("REITs") and other real estate-related securities;

• inflation-linked securities and related derivatives; and

• currencies.

The Fund's investments within each asset class will generally be index-based--i.e., portfolios of securities intended to track the performance of a particular index and index-based exchange-traded funds ("ETFs") and derivatives. The Fund's investments in each asset class will generally be global in nature, and will generally include investments in both developed and emerging markets. The Fund may invest in debt securities with a range of maturities from short- to long-term.

ETFs and derivatives, such as options, futures, forwards and swaps, may provide more efficient and economical exposure to market segments than direct investments, and the Fund's market exposures may at times be achieved almost entirely through investments in ETF shares and/or through the use of derivatives. Shares of ETFs and 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 invest in ETFs or to enter into derivatives transactions, the Adviser will consider factors such as the risks and returns of these investments relative to direct investments and the costs 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 significant portion of the Fund's assets may be held in cash or invested in cash equivalents, such as short-term U.S. Government and agency securities, repurchase agreements and money market funds.

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 that the Fund will seek to gain exposure to commodities and commodities-related instruments and derivatives primarily through investments in AllianceBernstein Dynamic All Market (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 will be 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 Fund's foreign currency exposures will come both from investments in equity and debt securities priced or denominated in foreign currencies and from direct holdings of 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. The Adviser may seek investment opportunities by taking long or short positions in currencies through the use of currency-related derivatives.

PRINCIPAL RISKS

• Market Risk: The value of the Fund's assets will fluctuate as the stock, bond, currency and commodity markets fluctuate. The value of the Fund's investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events that affect large portions of the market.

• Allocation Risk: The allocation of the Fund's assets among different asset classes, such as equity securities, debt securities and currencies, may have a significant effect on the Fund's net asset value, or NAV, when one of these asset classes is performing better or worse than others.

• Derivatives Risk: Derivatives may be illiquid, difficult to price, and leveraged so that small changes may produce disproportionate losses for the Fund, and may be subject to counterparty risk to a greater degree than more traditional investments.

• 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.

• 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 less liquid due to adverse market, economic, political, regulatory or other factors.

• Emerging Market Risk: Investments in emerging market countries may have more risk because the markets are less developed and less liquid, and because these investments may be subject to increased economic, political, regulatory and other uncertainties.

• Currency Risk: Fluctuations in currency exchange rates may negatively affect the value of the Fund's investments or reduce its returns.

• 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.

• 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, guarantor or counterparty may default causing a loss of the full principal amount of a security or the amount to which the Fund is entitled in a derivatives transaction. 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.

• High Yield Debt Security 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, negative perceptions of the junk bond market generally and less secondary market liquidity.

• Commodity Risk: Investing in commodities and commodity-linked derivative instruments may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by 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.

• 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.

• Real Estate Risk: The Fund's investments in real estate securities have many of the same risks as direct ownership of real estate, including the risk that the value of real estate could decline due to a variety of factors that affect the real estate market generally. Investments in REITs may have additional risks. REITs are dependent on the capability of their managers, may have limited diversification, and could be significantly affected by changes in taxes.

• Diversification Risk: The Fund may have more risk because it is "non-diversified", meaning that it can invest more of its assets in a smaller number of issuers.

• 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.

As with all investments, you may lose money by investing in the Fund.

BAR CHART AND PERFORMANCE INFORMATION

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 over the life of the Fund; and

• how the Fund's average annual returns for one year and over the life of the Fund compare to those of broad-based securities market indices.

You may obtain updated performance information on the Fund's website at www.AllianceBernstein.com (click on "Individuals--U.S." then "Products & Performance").

The Fund's past performance before and after taxes, of course, does not necessarily indicate how it will perform in the future.

Bar Chart

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 March 31, 2013, the year-to-date unannualized return for Class A shares was 3.83%.

Calendar Year End (%)

During the period shown in the bar chart, the Fund's:

Best Quarter was up 4.64%, 1st quarter, 2012; and Worst Quarter was down -1.99%, 2nd quarter, 2012.

Performance Table
Average Annual Total Returns
(For the periods ended December 31, 2012)

Average Annual Total Returns Retail and Retirement Shares AllianceBernstein Dynamic All Market Fund		1 Year	Since Inception		Inception Date
Class A	[1]	4.60%	5.76%	[2]	Dec. 16, 2011
Class A Return After Taxes on Distributions	[1]	3.51%	4.70%	[2]	Dec. 16, 2011
Class A Return After Taxes on Distributions and Sale of Fund Shares	[1]	3.06%	4.31%	[2]	Dec. 16, 2011
Class C		7.49%	9.50%	[2]	Dec. 16, 2011
Advisor Class		9.60%	10.57%	[2]	Dec. 16, 2011
Class R		9.05%	10.02%	[2]	Dec. 16, 2011
Class K		9.36%	10.33%	[2]	Dec. 16, 2011
Class I		9.64%	10.62%	[2]	Dec. 16, 2011
MSCI World Index (net) (reflects no deduction for fees, expenses, or taxes)		15.83%	18.65%	[2]	Dec. 16, 2011
Barclays Global Treasury Bond Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)	[3]	4.49%	4.46%	[2]	Dec. 16, 2011
Blended Benchmark: 60% MSCI World Index (net) /40% Barclays Global Treasury Index (U.S. dollar hedged) (reflects no deduction for fees, expenses, or taxes)	[3]	11.42%	12.99%	[2]	Dec. 16, 2011

[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] For Class C shares, the CDSC is 0% after the first year.

[1] Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not match the expense ratios included in the Financial Highlights table below, as the Financial Highlights tables do not include Acquired Fund Fees and Expenses.

[2] The Adviser has agreed to waive its management fees and/or to bear expenses of the Fund through February 28, 2015 to the extent necessary to prevent total Fund operating expenses, on an annualized basis, from exceeding 1.10% on Class A shares, 1.80% on Class C shares, 0.80% on Advisor Class shares, 1.30% on Class R shares, 1.05% on Class K shares, or 0.80% on Class I shares (excluding Acquired Fund Fees and Expenses other than the advisory fees of any AllianceBernstein Mutual Funds in which the Fund may invest, interest expense, brokerage commissions and other transaction costs, taxes and extraordinary expenses). Any fees waived and expenses borne by the Adviser may be reimbursed by the Fund until February 28, 2015, provided that no reimbursement payment will be made that would cause the Fund's total annual Fund operating expenses to exceed the percentages in the preceding sentence or cause the total of the payments to exceed the Fund's total initial offering expenses.

[1] Assuming redemption at the end of the period, a 1% CDSC would increase the expenses by approximately $100.

[1] After-tax returns: -Are shown for Class A shares only and will vary for Class C and Advisor Class shares because these Classes have different expense ratios; -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; 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.

[2] Since inception return is from December 16, 2011.

[3] The performance table includes an index of fixed-income securities and information about a blend of 60% MSCI World Index and 40% Barclays Global Treasury Index to show how the Fund's performance compares with other indices of securities similar to those in which the Fund invests.

XML

Document and Entity Information	12 Months Ended
	Jul. 01, 2013
Risk/Return:
Document Type	485BPOS
Document Period End Date	Feb. 28, 2013
Registrant Name	ALLIANCEBERNSTEIN CAP FUND, INC.
Central Index Key	0000081443
Amendment Flag	false
Document Creation Date	Jun. 27, 2013
Document Effective Date	Jul. 01, 2013
Prospectus Date	Jul. 01, 2013