485BPOS

As filed with the Securities and Exchange Commission on November 15, 2013

File Nos. 33-49530

811-06730

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933	¨
Pre-Effective Amendment No.	¨
Post-Effective Amendment No. 46	x

and/or

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940

Amendment No. 48 x

ALLIANCEBERNSTEIN

LARGE CAP GROWTH FUND, INC.

(Exact Name of Registrant as Specified in Charter)

1345 Avenue of the Americas

New York, New York 10105

(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 10105

(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 November 15, 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.

SIGNATURES

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 of New York and the State of New York, on the 15^th day of November, 2013.

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

Pursuant to the requirements of the Securities Act of 1933, as amended, this Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

	Signature	Title	Date
1)	Principal Executive Officer:
	Robert M. Keith* Robert M. Keith	President and Chief Executive Officer	November 15, 2013
2)	Principal Financial and Accounting Officer:
	/s/    Joseph J. Mantineo Joseph J. Mantineo	Treasurer and Chief Financial Officer	November 15, 2013
3)	All 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)		November 15, 2013

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 LARGE CAP GROWTH FUND INC
Prospectus Date	rr_ProspectusDate	Nov. 01, 2013
Document Creation Date	dei_DocumentCreationDate	Oct. 30, 2013

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC
Prospectus Date	rr_ProspectusDate	Nov. 01, 2013
ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	ALLIANCEBERNSTEIN LARGE CAP GROWTH 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 45 of this Prospectus and in Purchase of Shares--Sales Charge Reduction Programs for Class A Shares on page 108 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	November 1, 2014
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 68% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	68.00%
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
Expense Example [Heading]	rr_ExpenseExampleHeading	EXAMPLES
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Examples assume that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Examples also assume that your investment has a 5% return each year, that the Fund’s operating expenses stay the same and that the fee waiver is in effect for only the first year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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 equity securities of a limited number of large, carefully selected, high-quality U.S. companies. The Fund invests primarily in the domestic equity securities of companies selected by the Fund’s Adviser for their growth potential within various market sectors. The Fund emphasizes investments in large, seasoned companies. Under normal circumstances, the Fund will invest at least 80% of its net assets in common stocks of large-capitalization companies. For these purposes, “large-capitalization companies” are those that, at the time of investment, have market capitalizations within the range of market capitalizations of companies appearing in the Russell 1000 Growth Index. While the market capitalizations of companies in the Russell 1000 Growth Index ranged from approximately $1.0 billion to $372 billion as of June 30, 2013, the Fund normally will invest in common stocks of companies with market capitalizations of at least $5 billion at the time of purchase. The Adviser expects that normally the Fund’s portfolio will tend to emphasize investments in securities issued by U.S. companies, although it may invest in foreign securities. The investment team allocates the Fund’s investments among broad sector groups based on the fundamental company research conducted by the Adviser’s internal research staff, assessing the current and forecasted investment opportunities and conditions, as well as diversification and risk considerations. The investment team may vary the percentage allocations among market sectors and may change the market sectors in which the Fund invests as companies’ potential for growth within a sector matures and new trends for growth emerge. The Adviser’s research focus is in companies with high sustainable growth prospects, high or improving return on invested capital, transparent business models, and strong and lasting competitive advantages. The Fund may, at times, invest in shares of ETFs in lieu of making direct investments in securities. ETFs may provide more efficient and economical exposure to the types of companies and geographic locations in which the Fund seeks to invest than direct investments. 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.
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 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 growth, may underperform 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. 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. Through September 30, 2013, the year-to-date unannualized return for Class A shares was 22.56%.
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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	During the period shown in the bar chart, the Fund’s: BEST QUARTER WAS UP 16.94%, 1ST QUARTER, 2012; AND WORST QUARTER WAS DOWN -15.76%, 3RD QUARTER, 2011.
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; actual after-tax returns depend on an individual investor's tax situation and are likely to differ from those shown;
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 the other Classes of shares because these Classes have different expense ratios;
ALLIANCEBERNSTEIN LARGE CAP GROWTH 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	0.75%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.30%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.23%
Other Expenses	rr_Component2OtherExpensesOverAssets	0.05%
Total Other Expenses	rr_OtherExpensesOverAssets	0.28%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.33%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.08%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.25%
After 1 Year	rr_ExpenseExampleYear01	547
After 3 Years	rr_ExpenseExampleYear03	821
After 5 Years	rr_ExpenseExampleYear05	1,115
After 10 Years	rr_ExpenseExampleYear10	1,952
2003	rr_AnnualReturn2003	22.71%
2004	rr_AnnualReturn2004	8.19%
2005	rr_AnnualReturn2005	14.15%
2006	rr_AnnualReturn2006	(0.91%)
2007	rr_AnnualReturn2007	13.77%
2008	rr_AnnualReturn2008	(31.66%)
2009	rr_AnnualReturn2009	41.15%
2010	rr_AnnualReturn2010	9.41%
2011	rr_AnnualReturn2011	(0.89%)
2012	rr_AnnualReturn2012	18.08%
Year to Date Return, Label	rr_YearToDateReturnLabel	year-to-date
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2013
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	22.56%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	BEST QUARTER
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	16.94%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	WORST QUARTER
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(15.76%)
1 YEAR	rr_AverageAnnualReturnYear01	13.07%	[3]
5 YEARS	rr_AverageAnnualReturnYear05	3.41%	[3]
10 YEARS	rr_AverageAnnualReturnYear10	7.29%	[3]
ALLIANCEBERNSTEIN LARGE CAP GROWTH 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%	[4]
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.29%
Other Expenses	rr_Component2OtherExpensesOverAssets	0.05%
Total Other Expenses	rr_OtherExpensesOverAssets	0.34%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.09%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	2.09%
After 1 Year	rr_ExpenseExampleYear01	612
After 3 Years	rr_ExpenseExampleYear03	855
After 5 Years	rr_ExpenseExampleYear05	1,124
After 10 Years	rr_ExpenseExampleYear10	2,227
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	212
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	655
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,124
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,227
1 YEAR	rr_AverageAnnualReturnYear01	13.00%
5 YEARS	rr_AverageAnnualReturnYear05	3.40%
10 YEARS	rr_AverageAnnualReturnYear10	7.07%
ALLIANCEBERNSTEIN LARGE CAP GROWTH 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%	[5]
Exchange Fee	rr_ExchangeFee	none
Management Fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.25%
Other Expenses	rr_Component2OtherExpensesOverAssets	0.05%
Total Other Expenses	rr_OtherExpensesOverAssets	0.30%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.05%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	2.05%
After 1 Year	rr_ExpenseExampleYear01	308
After 3 Years	rr_ExpenseExampleYear03	643
After 5 Years	rr_ExpenseExampleYear05	1,103
After 10 Years	rr_ExpenseExampleYear10	2,379
After 1 Year	rr_ExpenseExampleNoRedemptionYear01	208
After 3 Years	rr_ExpenseExampleNoRedemptionYear03	643
After 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,103
After 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,379
1 YEAR	rr_AverageAnnualReturnYear01	16.14%
5 YEARS	rr_AverageAnnualReturnYear05	3.46%
10 YEARS	rr_AverageAnnualReturnYear10	6.93%
ALLIANCEBERNSTEIN LARGE CAP GROWTH 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	0.75%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.23%
Other Expenses	rr_Component2OtherExpensesOverAssets	0.05%
Total Other Expenses	rr_OtherExpensesOverAssets	0.28%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.03%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.03%
After 1 Year	rr_ExpenseExampleYear01	105
After 3 Years	rr_ExpenseExampleYear03	328
After 5 Years	rr_ExpenseExampleYear05	569
After 10 Years	rr_ExpenseExampleYear10	1,259
1 YEAR	rr_AverageAnnualReturnYear01	18.34%
5 YEARS	rr_AverageAnnualReturnYear05	4.54%
10 YEARS	rr_AverageAnnualReturnYear10	8.04%
ALLIANCEBERNSTEIN LARGE CAP GROWTH 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	0.75%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.26%
Other Expenses	rr_Component2OtherExpensesOverAssets	0.05%
Total Other Expenses	rr_OtherExpensesOverAssets	0.31%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.56%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.56%
After 1 Year	rr_ExpenseExampleYear01	159
After 3 Years	rr_ExpenseExampleYear03	493
After 5 Years	rr_ExpenseExampleYear05	850
After 10 Years	rr_ExpenseExampleYear10	1,856
1 YEAR	rr_AverageAnnualReturnYear01	17.79%	[6]
5 YEARS	rr_AverageAnnualReturnYear05	4.13%	[6]
10 YEARS	rr_AverageAnnualReturnYear10	7.59%	[6]
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 03, 2003	[6]
ALLIANCEBERNSTEIN LARGE CAP GROWTH 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	0.75%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.20%
Other Expenses	rr_Component2OtherExpensesOverAssets	0.05%
Total Other Expenses	rr_OtherExpensesOverAssets	0.25%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.25%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.25%
After 1 Year	rr_ExpenseExampleYear01	127
After 3 Years	rr_ExpenseExampleYear03	397
After 5 Years	rr_ExpenseExampleYear05	686
After 10 Years	rr_ExpenseExampleYear10	1,511
1 YEAR	rr_AverageAnnualReturnYear01	18.13%	[6]
5 YEARS	rr_AverageAnnualReturnYear05	4.42%	[6]
10 YEARS	rr_AverageAnnualReturnYear10	7.91%	[6]
Inception Date	rr_AverageAnnualReturnInceptionDate	Mar. 01, 2005	[6]
ALLIANCEBERNSTEIN LARGE CAP GROWTH 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	0.75%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses: Transfer Agent	rr_Component1OtherExpensesOverAssets	0.08%
Other Expenses	rr_Component2OtherExpensesOverAssets	0.05%
Total Other Expenses	rr_OtherExpensesOverAssets	0.13%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.88%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.88%
After 1 Year	rr_ExpenseExampleYear01	90
After 3 Years	rr_ExpenseExampleYear03	281
After 5 Years	rr_ExpenseExampleYear05	488
After 10 Years	rr_ExpenseExampleYear10	$ 1,084
1 YEAR	rr_AverageAnnualReturnYear01	18.57%	[6]
5 YEARS	rr_AverageAnnualReturnYear05	4.79%	[6]
10 YEARS	rr_AverageAnnualReturnYear10	8.29%	[6]
Inception Date	rr_AverageAnnualReturnInceptionDate	Mar. 01, 2005	[6]
ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC | Return After Taxes on Distributions | CLASS A
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	13.07%	[3]
5 YEARS	rr_AverageAnnualReturnYear05	3.41%	[3]
10 YEARS	rr_AverageAnnualReturnYear10	7.29%	[3]
ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC | Return After Taxes on Distributions and Sale of Fund Shares | CLASS A
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	8.49%	[3]
5 YEARS	rr_AverageAnnualReturnYear05	2.93%	[3]
10 YEARS	rr_AverageAnnualReturnYear10	6.44%	[3]
ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC | Russell 3000 (R) Growth Index (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 YEAR	rr_AverageAnnualReturnYear01	15.26%
5 YEARS	rr_AverageAnnualReturnYear05	3.12%
10 YEARS	rr_AverageAnnualReturnYear10	7.52%

[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 agreement will remain in effect until November 1, 2014 and will continue thereafter from year to year unless the Adviser provides notice of termination 60 days prior to that date.

[3] After-tax returns: -Are shown for Class A shares only and will vary for the other Classes of shares because these Classes have different expense ratios; -Are 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] 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.

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

[6] Inception date for Class R shares: 11/3/03, and for Class K and Class I shares: 3/1/05. Performance information for periods prior to the inception of Class R, Class K and Class I shares is the performance of the Fund's Class A shares adjusted to reflect the higher expense ratio of the Class R shares and the lower expense ratios of Class K and Class I shares, respectively.

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ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC

ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND

INVESTMENT OBJECTIVE

The Fund’s investment objective is long-term growth of capital.

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 Funds--Sales Charge Reduction Programs for Class A Shares on page 45 of this Prospectus and in Purchase of Shares--Sales Charge Reduction Programs for Class A Shares on page 108 of the Funds’ SAI.

SHAREHOLDER FEES (fees paid directly from your investment)

Shareholder Fees ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC (USD $)	CLASS A SHARES		CLASS B SHARES		CLASS C SHARES		ADVISOR CLASS SHARES	CLASS R SHARES	CLASS K SHARES	CLASS I SHARES
Shareholder Fees Column [Text]			(NOT CURRENTLY OFFERED TO NEW INVESTORS)
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	4.25%		none		none		none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower)	none	[1]	4.00%	[2]	1.00%	[3]	none	none	none	none
Exchange Fee	none		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 ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC	CLASS A		CLASS B	CLASS C	ADVISOR CLASS	CLASS R	CLASS K	CLASS I
Management Fees	0.75%		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees	0.30%		1.00%	1.00%	none	0.50%	0.25%	none
Other Expenses: Transfer Agent	0.23%		0.29%	0.25%	0.23%	0.26%	0.20%	0.08%
Other Expenses	0.05%		0.05%	0.05%	0.05%	0.05%	0.05%	0.05%
Total Other Expenses	0.28%		0.34%	0.30%	0.28%	0.31%	0.25%	0.13%
Total Annual Fund Operating Expenses	1.33%		2.09%	2.05%	1.03%	1.56%	1.25%	0.88%
Fee Waiver and/or Expense Fee Waiver and/or Expense Reimbursement	(0.08%)	[1]	none	none	none	none	none	none
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.25%		2.09%	2.05%	1.03%	1.56%	1.25%	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 and then redeem all of your shares at the end of those periods. The Examples also assume that your investment has a 5% return each year, that the Fund’s operating expenses stay the same and that the fee waiver is in effect for only the first year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC (USD $)	CLASS A	CLASS B	CLASS C	ADVISOR CLASS	CLASS R	CLASS K	CLASS I
After 1 Year	547	612	308	105	159	127	90
After 3 Years	821	855	643	328	493	397	281
After 5 Years	1,115	1,124	1,103	569	850	686	488
After 10 Years	1,952	2,227	2,379	1,259	1,856	1,511	1,084

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:

Expense Example, No Redemption ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC (USD $)	CLASS B	CLASS C
After 1 Year	212	208
After 3 Years	655	643
After 5 Years	1,124	1,103
After 10 Years	2,227	2,379

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 68% of the average value of its portfolio.

PRINCIPAL STRATEGIES

The Fund invests primarily in equity securities of a limited number of large, carefully selected, high-quality U.S. companies. The Fund invests primarily in the domestic equity securities of companies selected by the Fund’s Adviser for their growth potential within various market sectors. The Fund emphasizes investments in large, seasoned companies. Under normal circumstances, the Fund will invest at least 80% of its net assets in common stocks of large-capitalization companies.

For these purposes, “large-capitalization companies” are those that, at the time of investment, have market capitalizations within the range of market capitalizations of companies appearing in the Russell 1000 Growth Index. While the market capitalizations of companies in the Russell 1000 Growth Index ranged from approximately $1.0 billion to $372 billion as of June 30, 2013, the Fund normally will invest in common stocks of companies with market capitalizations of at least $5 billion at the time of purchase.

The Adviser expects that normally the Fund’s portfolio will tend to emphasize investments in securities issued by U.S. companies, although it may invest in foreign securities.

The investment team allocates the Fund’s investments among broad sector groups based on the fundamental company research conducted by the Adviser’s internal research staff, assessing the current and forecasted investment opportunities and conditions, as well as diversification and risk considerations. The investment team may vary the percentage allocations among market sectors and may change the market sectors in which the Fund invests as companies’ potential for growth within a sector matures and new trends for growth emerge.

The Adviser’s research focus is in companies with high sustainable growth prospects, high or improving return on invested capital, transparent business models, and strong and lasting competitive advantages.

The Fund may, at times, invest in shares of ETFs in lieu of making direct investments in securities. ETFs may provide more efficient and economical exposure to the types of companies and geographic locations in which the Fund seeks to invest than direct investments.

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.

PRINCIPAL RISKS

• MARKET RISK: The value of the Fund's assets will fluctuate as the stock or bond market fluctuates. The value of its investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events that affect large portions of the market. It includes the risk that a particular style of investing, such as growth, may underperform 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.

• 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.

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 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.

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 September 30, 2013, the year-to-date unannualized return for Class A shares was 22.56%.

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

BEST QUARTER WAS UP 16.94%, 1ST QUARTER, 2012; AND WORST QUARTER WAS DOWN
-15.76%, 3RD QUARTER, 2011.

PERFORMANCE TABLE
AVERAGE ANNUAL TOTAL RETURNS

(For the periods ended December 31, 2012)

Average Annual Total Returns ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC		1 YEAR	5 YEARS	10 YEARS	Inception Date
CLASS A	[1]	13.07%	3.41%	7.29%
CLASS A Return After Taxes on Distributions	[1]	13.07%	3.41%	7.29%
CLASS A Return After Taxes on Distributions and Sale of Fund Shares	[1]	8.49%	2.93%	6.44%
CLASS B		13.00%	3.40%	7.07%
CLASS C		16.14%	3.46%	6.93%
ADVISOR CLASS		18.34%	4.54%	8.04%
CLASS R	[2]	17.79%	4.13%	7.59%	Nov. 03, 2003
CLASS K	[2]	18.13%	4.42%	7.91%	Mar. 01, 2005
CLASS I	[2]	18.57%	4.79%	8.29%	Mar. 01, 2005
Russell 3000 (R) Growth Index (reflects no deduction for fees, expenses, or taxes)		15.26%	3.12%	7.52%

[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] 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.

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

[1] The fee waiver and/or expense reimbursement agreement will remain in effect until November 1, 2014 and will continue thereafter from year to year unless the Adviser provides notice of termination 60 days prior to that date.

[1] After-tax returns: -Are shown for Class A shares only and will vary for the other Classes of shares because these Classes have different expense ratios; -Are 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] Inception date for Class R shares: 11/3/03, and for Class K and Class I shares: 3/1/05. Performance information for periods prior to the inception of Class R, Class K and Class I shares is the performance of the Fund's Class A shares adjusted to reflect the higher expense ratio of the Class R shares and the lower expense ratios of Class K and Class I shares, respectively.

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Jul. 31, 2013
Registrant Name	dei_EntityRegistrantName	ALLIANCEBERNSTEIN LARGE CAP GROWTH FUND INC
Central Index Key	dei_EntityCentralIndexKey	0000889508
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Oct. 30, 2013
Document Effective Date	dei_DocumentEffectiveDate	Nov. 01, 2013
Prospectus Date	rr_ProspectusDate	Nov. 01, 2013