Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC.
Prospectus Date	rr_ProspectusDate	Mar. 01, 2014
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC.
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund’s investment objective is long-term growth of capital.
Expense [Heading]	rr_ExpenseHeading	FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy 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 Funds--Sales Charge Reduction Programs for Class A Shares on page 56 of this Prospectus and in Purchase of Shares--Sales Charge Reduction Programs for Class A Shares on page 113 of the Funds’ 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	March 1, 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 99% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	99.00%
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 CDSC which may be subject to waiver in certain circumstances. Class B shares automatically convert to Class A shares after eight years. The CDSC decreases over time. For Class B shares the CDSC decreases 1.00% annually to 0% after the fourth year. 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 Restated to Reflect Current [Text]	rr_ExpensesRestatedToReflectCurrent	Restated to reflect current expense limitations.
Expense Example [Heading]	rr_ExpenseExampleHeading	EXAMPLES
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Examples assume that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Examples also assume that your investment has a 5% return each year and that the Fund’s operating expenses stay the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text]	rr_ExpenseExampleNoRedemptionByYearCaption	For the share classes listed below, you would pay the following expenses if you did not redeem your shares at the end of the period:
Strategy [Heading]	rr_StrategyHeading	PRINCIPAL STRATEGIES
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests primarily in the equity securities of U.S. companies that the Adviser believes are undervalued. The Adviser believes that, over time, a company’s stock price will come to reflect its intrinsic economic value. The Fund may invest in companies of any size and in any industry. The Adviser depends heavily upon the fundamental analysis and research of its large internal research staff in making investment decisions for the Fund. The research staff follows a primary research universe of approximately 500, largely U.S., companies. In determining a company’s intrinsic economic value, the Adviser takes into account many fundamental and financial factors that it believes bear on the company’s ability to perform in the future, including earnings growth, prospective cash flows, dividend growth and growth in book value. The Adviser then ranks each of the companies in its research universe in the relative order of disparity between their intrinsic economic values and their current stock prices, with companies with the greatest disparities receiving the highest rankings (i.e., being considered the most undervalued). The Adviser anticipates that the Fund’s portfolio normally will include companies ranking in the top three deciles of the Adviser’s valuation model. The Adviser recognizes that the perception of what is a “value” stock is relative and the factors considered in determining whether a stock is a “value” stock may, and often will, have differing relative significance in different phases of an economic cycle. Also, at different times, and as a result of how individual companies are valued in the market, the Fund may be attracted to investments in companies with different market capitalizations (i.e., large-, mid- or small-capitalization) or companies engaged in particular types of business (e.g., banks and other financial institutions), although the Fund does not intend to concentrate in any particular industries or businesses. The Fund’s portfolio emphasis upon particular industries or sectors will be a by-product of the stock selection process rather than the result of assigned targets or ranges. The Fund may enter into derivatives transactions, such as options, futures contracts, forwards, and swaps. The Fund may use options strategies involving the purchase and/or writing of various combinations of call and/or put options, including on individual securities and stock indices, futures contracts (including futures contracts on individual securities and stock indices) or shares of ETFs. These transactions may be used, for example, in an effort to earn extra income, to adjust exposure to individual securities or markets, or to protect all or a portion of the Fund’s portfolio from a decline in value, sometimes within certain ranges. The Fund may, at times, invest in shares of ETFs in lieu of making direct investments in equity securities. ETFs may provide more efficient and economical exposure to the type of companies and geographic locations in which the Fund seeks to invest than direct investments.
Risk [Heading]	rr_RiskHeading	PRINCIPAL RISKS
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	MARKET RISK: The value of the Fund’s investments will fluctuate as the stock or bond market fluctuates. The value of its investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events that affect large portions of the market. It includes the risk that a particular style of investing, such as the Fund’s value approach, may be underperforming the market generally. FOCUSED PORTFOLIO RISK: Investments in a limited number of companies may have more risk because changes in the value of a single security may have a more significant effect, either negative or positive, on the Fund’s net asset value, or NAV. 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. CURRENCY RISK: Fluctuations in currency exchange rates may negatively affect the value of the Fund’s investments or reduce its returns. 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. MANAGEMENT RISK: The Fund is subject to management risk because it is an actively-managed investment fund. The Adviser will apply its investment techniques and risk analyses in making investment decisions for the Fund, but there is no guarantee that its techniques will produce the intended results. As with all investments, you may lose money by investing in the Fund.
Risk Lose Money [Text]	rr_RiskLoseMoney	As with all investments, you may lose money by investing in the Fund.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	BAR CHART AND PERFORMANCE INFORMATION
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart and performance information provide an indication of the historical risk of an investment in the Fund by showing: how the Fund’s performance changed from year to year over ten years; and how the Fund’s average annual returns for one, five and ten years compare to those of a broad-based securities market index. You may obtain updated performance information on the Fund’s website at www.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 from year to year over ten years; and how the Fund’s average annual returns for one, five and ten years compare to those of a broad-based securities market index.
Performance 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.
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 14.55%, 3RD QUARTER, 2010; AND WORST QUARTER WAS DOWN -23.36%, 4TH QUARTER, 2008.
Performance Table Heading	rr_PerformanceTableHeading	PERFORMANCE TABLE AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, 2013)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	Are estimates based on the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes;
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	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 B and Class C shares because these Classes have different expense ratios;
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | CLASS A
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.25%
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.30%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.21%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.35%
Total Other Expenses	rr_OtherExpensesOverAssets	0.56%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	1.41%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.21%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.20%	[3]
After 1 Year	rr_ExpenseExampleYear01	542
After 3 Years	rr_ExpenseExampleYear03	832
After 5 Years	rr_ExpenseExampleYear05	1,142
After 10 Years	rr_ExpenseExampleYear10	2,022
2004	rr_AnnualReturn2004	8.86%
2005	rr_AnnualReturn2005	1.20%
2006	rr_AnnualReturn2006	15.34%
2007	rr_AnnualReturn2007	8.73%
2008	rr_AnnualReturn2008	(38.17%)
2009	rr_AnnualReturn2009	22.66%
2010	rr_AnnualReturn2010	15.56%
2011	rr_AnnualReturn2011	5.04%
2012	rr_AnnualReturn2012	15.63%
2013	rr_AnnualReturn2013	33.26%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	BEST QUARTER
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2010
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	14.55%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	WORST QUARTER
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(23.36%)
1 YEAR	rr_AverageAnnualReturnYear01	27.60%	[4]
5 YEARS	rr_AverageAnnualReturnYear05	17.05%	[4]
10 YEARS	rr_AverageAnnualReturnYear10	6.50%	[4]
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | CLASS B
Risk/Return:	rr_RiskReturnAbstract
Shareholder Fees Column [Text]	rr_ShareholderFeesColumnName	(NOT CURRENTLY OFFERED TO NEW INVESTORS)
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	4.00%	[5]
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.24%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.34%
Total Other Expenses	rr_OtherExpensesOverAssets	0.58%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	2.13%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.23%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.90%	[3]
After 1 Year	rr_ExpenseExampleYear01	593
After 3 Years	rr_ExpenseExampleYear03	844
After 5 Years	rr_ExpenseExampleYear05	1,122
After 10 Years	rr_ExpenseExampleYear10	2,258
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	193
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	644
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,122
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,258
1 YEAR	rr_AverageAnnualReturnYear01	29.00%
5 YEARS	rr_AverageAnnualReturnYear05	17.70%
10 YEARS	rr_AverageAnnualReturnYear10	6.58%
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | CLASS C
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[6]
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.21%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.35%
Total Other Expenses	rr_OtherExpensesOverAssets	0.56%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	2.11%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.21%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.90%	[3]
After 1 Year	rr_ExpenseExampleYear01	293
After 3 Years	rr_ExpenseExampleYear03	640
After 5 Years	rr_ExpenseExampleYear05	1,114
After 10 Years	rr_ExpenseExampleYear10	2,424
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	193
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	640
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,114
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,424
1 YEAR	rr_AverageAnnualReturnYear01	31.37%
5 YEARS	rr_AverageAnnualReturnYear05	17.24%
10 YEARS	rr_AverageAnnualReturnYear10	6.20%
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | ADVISOR CLASS
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.20%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.36%
Total Other Expenses	rr_OtherExpensesOverAssets	0.56%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	1.11%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.21%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.90%	[3]
After 1 Year	rr_ExpenseExampleYear01	92
After 3 Years	rr_ExpenseExampleYear03	332
After 5 Years	rr_ExpenseExampleYear05	591
After 10 Years	rr_ExpenseExampleYear10	1,333
1 YEAR	rr_AverageAnnualReturnYear01	33.62%	[7]
5 YEARS	rr_AverageAnnualReturnYear05	18.42%	[7]
10 YEARS	rr_AverageAnnualReturnYear10	7.28%	[7]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Mar. 01, 2010	[7]
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | CLASS R
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.23%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.35%
Total Other Expenses	rr_OtherExpensesOverAssets	0.58%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	1.63%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.23%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.40%	[3]
After 1 Year	rr_ExpenseExampleYear01	143
After 3 Years	rr_ExpenseExampleYear03	492
After 5 Years	rr_ExpenseExampleYear05	865
After 10 Years	rr_ExpenseExampleYear10	1,914
1 YEAR	rr_AverageAnnualReturnYear01	33.09%
5 YEARS	rr_AverageAnnualReturnYear05	17.87%
10 YEARS	rr_AverageAnnualReturnYear10	6.77%
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | CLASS K
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.20%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.35%
Total Other Expenses	rr_OtherExpensesOverAssets	0.55%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	1.35%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.20%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.15%	[3]
After 1 Year	rr_ExpenseExampleYear01	117
After 3 Years	rr_ExpenseExampleYear03	409
After 5 Years	rr_ExpenseExampleYear05	722
After 10 Years	rr_ExpenseExampleYear10	1,610
1 YEAR	rr_AverageAnnualReturnYear01	33.40%	[7]
5 YEARS	rr_AverageAnnualReturnYear05	18.17%	[7]
10 YEARS	rr_AverageAnnualReturnYear10	7.06%	[7]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Mar. 01, 2005	[7]
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | CLASS I
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.06%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.38%
Total Other Expenses	rr_OtherExpensesOverAssets	0.44%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	0.99%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.09%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.90%	[3]
After 1 Year	rr_ExpenseExampleYear01	92
After 3 Years	rr_ExpenseExampleYear03	307
After 5 Years	rr_ExpenseExampleYear05	540
After 10 Years	rr_ExpenseExampleYear10	1,207
1 YEAR	rr_AverageAnnualReturnYear01	33.83%	[7]
5 YEARS	rr_AverageAnnualReturnYear05	18.52%	[7]
10 YEARS	rr_AverageAnnualReturnYear10	7.39%	[7]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Mar. 01, 2005	[7]
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | CLASS Z
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.02%
Other Expenses: Other Expenses	rr_Component2OtherExpensesOverAssets	0.38%
Total Other Expenses	rr_OtherExpensesOverAssets	0.40%
Total Annual Fund Operating Expenses Before Waiver	rr_ExpensesOverAssets	0.95%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.05%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.90%	[3]
After 1 Year	rr_ExpenseExampleYear01	92
After 3 Years	rr_ExpenseExampleYear03	298
After 5 Years	rr_ExpenseExampleYear05	521
After 10 Years	rr_ExpenseExampleYear10	$ 1,162
1 YEAR	rr_AverageAnnualReturnYear01	33.75%	[7]
5 YEARS	rr_AverageAnnualReturnYear05	18.44%	[7]
10 YEARS	rr_AverageAnnualReturnYear10	7.29%	[7]
INCEPTION DATE	rr_AverageAnnualReturnInceptionDate	Oct. 15, 2013	[7]
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | Return After Taxes on Distributions | CLASS A
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	27.60%	[4]
5 YEARS	rr_AverageAnnualReturnYear05	17.05%	[4]
10 YEARS	rr_AverageAnnualReturnYear10	5.69%	[4]
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | Return After Taxes on Distributions and Sale of Fund Shares | CLASS A
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	15.62%	[4]
5 YEARS	rr_AverageAnnualReturnYear05	13.84%	[4]
10 YEARS	rr_AverageAnnualReturnYear10	5.13%	[4]
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | S&P 500 Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	32.39%
5 YEARS	rr_AverageAnnualReturnYear05	17.94%
10 YEARS	rr_AverageAnnualReturnYear10	7.41%
ALLIANCEBERNSTEIN CORE OPPORTUNITIES FUND, INC. | Russell 1000(TM) Value Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	32.53%
5 YEARS	rr_AverageAnnualReturnYear05	16.67%
10 YEARS	rr_AverageAnnualReturnYear10	7.58%

[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 CDSC which may be subject to waiver in certain circumstances.

[2] The Fee Waiver and/or Expense Reimbursement will remain in effect until March 1, 2015 and will continue thereafter from year-to-year unless the Adviser provides notice of termination 60 days prior to that date.

[3] Restated to reflect current expense limitations.

[4] After-tax returns: -Are shown for Class A shares only and will vary for Class B and Class C shares because these Classes have different expense ratios; -Are estimates based on the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes; actual after-tax returns depend on an individual investor’s tax situation and are likely to differ from those shown; and -Are not relevant to investors who hold fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

[5] Class B shares automatically convert to Class A shares after eight years. The CDSC decreases over time. For Class B shares the CDSC decreases 1.00% annually to 0% after the fourth year.

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

[7] Inception dates: 3/1/10 for Advisor Class shares, 3/1/05 for Class K and Class I shares and 10/15/13 for Class Z shares. Performance information for periods prior to the inception of Advisor Class, Class K, Class I and Class Z shares is the performance of the Fund's Class A shares adjusted to reflect the lower expense ratios of Advisor Class, Class K, Class I and Class Z shares.