| Label | Element | Value | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Sanford C. Bernstein Fund, Inc. | Intermediate Duration Portfolio | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | FIXED-INCOME TAXABLE PORTFOLIOS Intermediate Duration Portfolio Intermediate Duration Portfolio of Sanford C. Bernstein Fund, Inc. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | INVESTMENT OBJECTIVE: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The Portfolio’s investment objective is to provide safety of principal and a moderate to high rate of income that is subject to taxes.
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| Expense [Heading] | rr_ExpenseHeading | FEES AND EXPENSES OF THE PORTFOLIO: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Portfolio. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
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| Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | Shareholder Fees (fees paid directly from your investment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | Portfolio Turnover | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | The Portfolio 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 Portfolio shares are held in a taxable account. These transaction costs, which are not reflected in the Annual Portfolio Operating Expenses or in the Examples, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 122% of the average value of its portfolio.
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| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 122.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 Portfolio with the cost of investing in other mutual funds. The Examples assume that you invest $10,000 in the Portfolio 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 Portfolio’s operating expenses stay the same. Although your actual costs may be higher or lower, based on these assumptions your costs as reflected in the Examples would be: |
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| Strategy [Heading] | rr_StrategyHeading | PRINCIPAL STRATEGIES: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | The Portfolio seeks to maintain an average portfolio quality minimum of A, based on ratings given to the Portfolio’s securities by NRSROs (or, if unrated, determined by AllianceBernstein L.P., the Portfolio’s investment manager (the “Manager”), to be of comparable quality). Many types of securities may be purchased by the Portfolio, including corporate bonds, notes, U.S. government and agency securities, asset-backed securities, mortgage-related securities, bank loan debt, preferred stock and inflation-protected securities, as well as others. The Portfolio may also invest up to 25% of its total assets in fixed-income, non‑U.S. Dollar denominated foreign securities, and may invest without limit in fixed-income, U.S. Dollar denominated foreign securities, in each case in developed or emerging-market countries. The Portfolio may use derivatives, such as options, futures contracts, forward contracts and swaps. The Portfolio may invest up to 25% of its total assets in fixed-income securities rated below investment grade (BB or below) by NRSROs (commonly known as “junk bonds”). No more than 5% of the Portfolio’s total assets may be invested in fixed-income securities rated CCC by NRSROs. In managing the Portfolio, the Manager may use interest rate forecasting to estimate an appropriate level of interest rate risk at a given time. The Portfolio seeks to maintain an effective duration of three to seven years under normal market conditions. Duration is a measure that relates the expected price volatility of a security to changes in interest rates. The duration of a debt security is the weighted average term to maturity, expressed in years, of the present value of all future cash flows, including coupon payments and principal repayments. Within the range described above, the Manager may moderately shorten the average duration of the Portfolio when it expects interest rates to rise and moderately lengthen average duration when it anticipates that interest rates will fall. The Manager selects securities for purchase or sale based on its assessment of the securities’ risk and return characteristics as well as the securities’ impact on the overall risk and return characteristics of the Portfolio. In making this assessment, the Manager takes into account various factors including the credit quality and sensitivity to interest rates of the securities under consideration and of the Portfolio’s other holdings. The Portfolio may enter into foreign currency transactions on a spot (i.e., cash) basis or through the use of derivatives transactions, such as forward currency exchange contracts, currency futures and options thereon, and options on currencies. An appropriate hedge of currency exposure resulting from the Portfolio’s securities positions may not be available or cost effective, or the Manager may determine not to hedge the positions, possibly even under market conditions where doing so could benefit the Portfolio.
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| Risk [Heading] | rr_RiskHeading | PRINCIPAL RISKS: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk Narrative [Text Block] | rr_RiskNarrativeTextBlock | The share price of the Portfolio will fluctuate and you may lose money. There is no guarantee that the Portfolio will achieve its investment objective.
The United States and other countries are periodically involved in disputes over trade and other matters, which may result in tariffs on various categories of goods imported from the other country, restrictions on investment and adverse impacts on affected companies and securities. For example, the current political climate between the United States and China has intensified concerns about protectionist trade policies and a potential trade war between China and the United States. The United States has imposed tariffs and other trade barriers on Chinese exports and placed other restrictions on or barriers to investments in China. Trade disputes, particularly prolonged disputes, may adversely affect the economies of the United States and its trading partners, as well as the companies directly or indirectly affected by the dispute and financial markets generally, and thus may adversely affect the value of the Portfolio’s assets. Recently, the United States government acted to prohibit U.S. persons, such as the Portfolio, from owning, and required them to divest, certain Chinese companies designated as related to the Chinese military. There is no assurance that more such companies will not be so designated in the future, which could limit the Portfolio’s opportunities for investment and require the sale of securities at a loss or make them illiquid. Additionally, the Chinese government is involved in a territorial dispute with Taiwan; the risk of a forced unification with Taiwan by the Chinese government may adversely affect securities of Chinese, Taiwan-based and other issuers both in and outside the region. If the political climate between the United States, China and other countries in Asia continues to deteriorate, economies and markets may be adversely affected. Policy and legislative changes in the U.S. and in other countries are affecting many aspects of financial regulation, and these and other events affecting global markets, such as the United Kingdom’s exit from the European Union; potential trade imbalances with China or other countries; or sanctions or other government actions against Russia, other nations, or individuals or companies (or countermeasures taken in response to such sanctions), may contribute to decreased liquidity and increased volatility in the financial markets. The impact of these changes on the markets, and the implications for market participants, may not be fully known for some time. Economies and financial markets throughout the world are becoming increasingly interconnected. Economic, financial or political events, trading and tariff arrangements, armed conflict, including Russia’s military invasion of Ukraine, terrorism, natural disasters (including the spread of infectious illness) and other circumstances in one country or region could have profound impacts on global economies or markets. Following Russia’s recent invasion of Ukraine, the United States, the European Union and the regulatory bodies of certain other countries instituted numerous sanctions against certain Russian individuals and Russian entities. These sanctions, and other intergovernmental actions that may be undertaken against Russia in the future, may result in the devaluation of Russian currency, a downgrade in the country’s credit rating, and a decline in the value and liquidity of Russian stocks. These sanctions could result in the immediate freeze of Russian securities, including securities in the form of ADRs, impairing the ability of the Portfolio to buy, sell, receive or deliver those securities. Retaliatory action by the Russian government could involve the seizure of U.S. and/or European residents’ assets and any such actions are likely to impair the value and liquidity of such assets. The continued disruption of the Russian economy has had severe adverse effects on the region and beyond, including significant negative impacts on the markets for certain securities and commodities, such as oil and natural gas, as well as other sectors. As a result, whether or not the Portfolio invests in securities of issuers located in or with significant exposure to countries experiencing economic and financial difficulties, the value and liquidity of the Portfolio’s investments may be negatively affected.
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| Risk Lose Money [Text] | rr_RiskLoseMoney | The share price of the Portfolio will fluctuate and you may lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 Portfolio by showing:
You may obtain updated performance information for the Portfolio at www.bernstein.com (at the bottom of the page, click on “Investments,” then “Mutual Fund Performance at a Glance”). The Portfolio’s past performance before and after taxes, of course, does not necessarily indicate how it will perform in the future. As with all investments, you may lose money by investing in the Portfolio.
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| Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | how the Portfolio’s performance changed from year to year over ten years; andhow the Portfolio’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.bernstein.com | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | The Portfolio’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 Intermediate Duration Class shares.
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| Bar Chart Closing [Text Block] | rr_BarChartClosingTextBlock | Calendar Year End (%) During the period shown in the bar chart, the Portfolio’s: Best Quarter was up 4.90%, 2nd quarter, 2020; and Worst Quarter was down -6.35%, 1st quarter, 2022. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Performance Table Heading | rr_PerformanceTableHeading | Performance Table Average Annual Total Returns (For the periods ended December 31, 2022) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | After‑tax returns 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 | 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 Portfolio shares through tax‑deferred arrangements such as 401(k) plans or individual retirement accounts. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Performance Table Narrative | rr_PerformanceTableNarrativeTextBlock | After‑tax returns 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 Portfolio shares through tax‑deferred arrangements such as 401(k) plans or individual retirement accounts.
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| Sanford C. Bernstein Fund, Inc. | Intermediate Duration Portfolio | Intermediate Duration 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 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Maximum Account Fee | rr_MaximumAccountFeeOverAssets | none | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Management Fees | rr_ManagementFeesOverAssets | 0.44% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distribution and/or Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Expenses: Shareholder Servicing Fees | rr_Component1OtherExpensesOverAssets | 0.10% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Expenses: Transfer Agent | rr_Component2OtherExpensesOverAssets | 0.01% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Expenses | rr_Component3OtherExpensesOverAssets | 0.01% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total Other Expenses | rr_OtherExpensesOverAssets | 0.12% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total Annual Portfolio Operating Expenses | rr_ExpensesOverAssets | 0.56% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| After 1 Year | rr_ExpenseExampleYear01 | $ 57 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| After 3 Years | rr_ExpenseExampleYear03 | 179 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| After 5 Years | rr_ExpenseExampleYear05 | 313 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| After 10 Years | rr_ExpenseExampleYear10 | $ 701 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2013 | rr_AnnualReturn2013 | (2.36%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2014 | rr_AnnualReturn2014 | 6.60% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2015 | rr_AnnualReturn2015 | 0.32% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2016 | rr_AnnualReturn2016 | 4.15% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2017 | rr_AnnualReturn2017 | 3.82% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2018 | rr_AnnualReturn2018 | (0.35%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2019 | rr_AnnualReturn2019 | 8.66% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2020 | rr_AnnualReturn2020 | 7.15% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2021 | rr_AnnualReturn2021 | (1.05%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2022 | rr_AnnualReturn2022 | (13.73%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | Best Quarter | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Jun. 30, 2020 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 4.90% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | Worst Quarter | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2022 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (6.35%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | (13.73%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | (0.19%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 1.12% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sanford C. Bernstein Fund, Inc. | Intermediate Duration Portfolio | Return After Taxes on Distributions | Intermediate Duration Class | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | (14.45%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | (1.32%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | (0.21%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sanford C. Bernstein Fund, Inc. | Intermediate Duration Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | Intermediate Duration Class | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | (8.12%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | (0.53%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 0.35% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sanford C. Bernstein Fund, Inc. | Intermediate Duration Portfolio | Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | (13.01%) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 0.02% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 1.06% |