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Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) | Neuberger Berman International Select Fund  
Risk/Return: rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading GOAL
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund seeks long-term growth of capital by investing primarily in common stocks of foreign companies.
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
These tables describe the fees and expenses that you may pay if you buy, hold or sell shares of the Fund. Under the Fund’s policies, you may qualify for initial sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Neuberger Berman funds. Certain financial intermediaries have sales charges and/or policies and procedures regarding sales charge waivers applicable to their customers that differ from those described below. More information about these and other discounts is available from your financial intermediary, in “Sales Charge Reductions and Waivers” on page 246 in the Fund’s prospectus, and in Appendix A to the Fund’s prospectus. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
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 % of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Aug. 31, 2025
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and 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 costs, which are not reflected in annual operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 21% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 21.00%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock For Class A shares, a contingent deferred sales charge (“CDSC”) of 1.00% applies on certain redemptions made within 18 months following purchases of $1 million or more made without an initial sales charge. For Class C shares, the CDSC is eliminated one year after purchase.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts Under the Fund’s policies, you may qualify for initial sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Neuberger Berman funds. Certain financial intermediaries have sales charges and/or policies and procedures regarding sales charge waivers applicable to their customers that differ from those described below. More information about these and other discounts is available from your financial intermediary, in “Sales Charge Reductions and Waivers” on page 246 in the Fund’s prospectus, and in Appendix A to the Fund’s prospectus.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Expense Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
The expense example can help you compare costs among mutual funds. The example assumes that you invested $10,000 for the periods shown, that you redeemed all of your shares at the end of those periods, that the Fund earned a hypothetical 5% total return each year, and that the Fund’s expenses were those in the table. For Class A and Institutional Class shares, your costs would be the same whether you sold your shares or continued to hold them at the end of each period. Actual performance and expenses may be higher or lower.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption (assuming redemption)
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption (assuming no redemption)
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
To pursue its goal, the Fund invests mainly in common stocks of foreign companies, including companies in developed and emerging markets. The Fund defines a foreign company as one that is organized outside of the United States and conducts the majority of its business abroad. Under normal circumstances, at least 80% of the Fund’s net assets, plus the amount of any borrowings for investment purposes, will be invested in companies with a market capitalization greater than $2.5 billion at the time of purchase.
In picking stocks, the Portfolio Managers look for what they believe to be well-managed and profitable companies that show growth potential and whose stock prices are undervalued. Factors in identifying these firms may include strong fundamentals, such as attractive cash flows and balance sheets, as well as prices that are reasonable in light of projected returns. The Portfolio Managers also consider the outlooks for various countries and sectors around the world, examining economic, market, social, and political conditions.
The Portfolio Managers systematically and explicitly include material Environmental, Social and Governance (ESG) risks and opportunities in investment analysis and investment decisions for all securities to help identify high quality securities. The Portfolio Managers conduct ongoing proprietary ESG research, including proactive engagement on ESG issues. The Portfolio Managers assess all securities in relation to their exposure to and the management of material ESG risks.
The Fund seeks to reduce risk by diversifying among many companies and industries. Although the Fund has the flexibility to invest a significant portion of its assets in one country or region, it generally intends to remain well-diversified across countries and geographical regions. At times, the Portfolio Managers may emphasize certain sectors or industries that they believe offers a better risk/reward opportunity.
The Portfolio Managers follow a disciplined selling strategy and may sell a stock when it reaches a target price, if a company’s business fails to perform as expected, or when other opportunities appear more attractive.
Risk [Heading] rr_RiskHeading PRINCIPAL INVESTMENT RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Most of the Fund’s performance depends on what happens in international stock markets, the Portfolio Managers' evaluation of those developments, and the success of the Portfolio Managers in implementing the Fund's investment strategies. The markets' behavior can be difficult to predict, particularly in the short term. There can be no guarantee that the Fund will achieve its goal. The Fund may take temporary defensive and cash management positions; to the extent it does, it will not be pursuing its principal investment strategies.
The actual risk exposure taken by the Fund in its investment program will vary over time, depending on various factors including the Portfolio Managers' evaluation of issuer, political, regulatory, market, or economic developments. There can be no guarantee that the Portfolio Managers will be successful in their attempts to manage the risk exposure of the Fund or will appropriately evaluate or weigh the multiple factors involved in investment decisions, including issuer, market and/or instrument-specific analysis, valuation and environmental, social and governance factors.
The Fund is a mutual fund, not a bank deposit, and is not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency. The value of your investment may fall, sometimes sharply, and you could lose money by investing in the Fund.
Each of the following risks, which are described in alphabetical order and not in order of any presumed importance, can significantly affect the Fund’s performance. The relative importance of, or potential exposure as a result of, each of these risks will vary based on market and other investment-specific considerations.
Currency Risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar. To the extent that the Fund invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by various factors, including investor perception and changes in interest rates; intervention, or failure to intervene, by U.S. or foreign governments, central banks, or supranational entities; or by currency controls or political developments in the U.S. or abroad.
Foreign and Emerging Market Risk. Foreign securities involve risks in addition to those associated with comparable U.S. securities. Additional risks include exposure to less developed or less efficient trading markets; social, political, diplomatic, or economic instability; trade barriers and other protectionist trade policies (including those of the U.S.); significant government involvement in an economy and/or market structure; fluctuations in foreign currencies or currency redenomination; potential for default on sovereign debt; nationalization or expropriation of assets; settlement, custodial or other operational risks; higher transaction costs; confiscatory withholding or other taxes; and less stringent auditing, corporate disclosure, governance, and legal standards. As a result, foreign securities may fluctuate more widely in price, and may also be less liquid, than comparable U.S. securities. Regardless of where a company is organized or its stock is traded, its performance may be affected significantly by events in regions from which it derives its profits or in which it conducts significant operations.
Investing in emerging market countries involves risks in addition to and greater than those generally associated with investing in more developed foreign countries. The governments of emerging market countries may be more unstable and more likely to impose capital controls, nationalize a company or industry, place restrictions on foreign ownership and on withdrawing sale proceeds of securities from the country, intervene in the financial markets, and/or impose burdensome taxes that could adversely affect security prices. To the extent a foreign security is denominated in U.S. dollars, there is also the risk that a foreign government will not let U.S. dollar-denominated assets leave the country. In addition, the economies of emerging market countries may be dependent on relatively few industries that are more susceptible to local and global changes. Emerging market countries may also have less developed legal and accounting systems. Securities markets in emerging market countries are also relatively small and have substantially lower trading volumes. Securities of issuers in emerging market countries may be more volatile and less liquid than securities of issuers in foreign countries with more developed economies or markets and the situation may require that the Fund fair value its holdings in those countries.
Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange, or by governmental authorities. The likelihood of such suspensions may be higher for securities of issuers in emerging or less-developed market countries than in countries with more developed markets. Trading suspensions may be applied from time to time to the securities of individual issuers for reasons specific to that issuer, or may be applied broadly by exchanges or governmental authorities in response to market events. Suspensions may last for significant periods of time, during which trading in the securities and in instruments that reference the securities, such as derivative instruments, may be halted. In the event that the Fund holds material positions in such suspended securities or instruments, the Fund’s ability to liquidate its positions or provide liquidity to investors may be compromised and the Fund could incur significant losses.
From time to time, based on market or economic conditions, the Fund may invest a significant portion of its assets in one country or geographic region. If the Fund does so, there is a greater risk that economic, political, regulatory, diplomatic, social and environmental conditions in that particular country or geographic region may have a significant impact on the Fund’s performance and that the Fund’s performance will be more volatile than the performance of more geographically diversified funds.
Growth Stock Risk. Because the prices of most growth stocks are based on future expectations, these stocks tend to be more sensitive than value stocks to bad economic news and negative earnings surprises. When these expectations are not met or decrease, the prices of these stocks may decline, sometimes sharply, even if earnings showed an absolute increase. The Fund attempts to lessen the risk of such losses by seeking growth stocks that sell at what the adviser believes are reasonable prices. If the adviser is incorrect in its assessment of a stock’s value, this may negatively impact the Fund. Bad economic news or changing investor perceptions may adversely affect growth stocks across several sectors and industries simultaneously.
Issuer-Specific Risk. An individual security may be more volatile, and may perform differently, than the market as a whole.
Liquidity Risk. From time to time, the trading market for a particular investment in which the Fund invests, or a particular type of instrument in which the Fund is invested, may become less liquid or even illiquid. Illiquid investments frequently can be more difficult to purchase or sell at an advantageous price or time, and there is a greater risk that the investments may not be sold for the price at which the Fund is carrying them. Certain investments that were liquid when the Fund purchased them may become illiquid, sometimes abruptly. Additionally, market closures due to holidays or other factors may render a security or group of securities (e.g., securities tied to a particular country or geographic region) illiquid for a period of time. An inability to sell a portfolio position can adversely affect the Fund’s value or prevent the Fund from being able to take advantage of other investment opportunities. Market prices for such securities or other investments may be volatile. During periods of substantial market volatility, an investment or even an entire market segment may become illiquid, sometimes abruptly, which can adversely affect the Fund’s ability to limit losses.
Unexpected episodes of illiquidity, including due to market or political factors, instrument or issuer-specific factors and/or unanticipated outflows, may limit the Fund’s ability to pay redemption proceeds within the allowable time period. To meet
redemption requests during periods of illiquidity, the Fund may be forced to sell securities at an unfavorable time and/or under unfavorable conditions.
Market Capitalization Risk. To the extent the Fund invests in securities of small-, mid-, or large-cap companies, it takes on the associated risks. At times, any of these market capitalizations may be out of favor with investors. Compared to small- and mid-cap companies, large-cap companies may be unable to respond as quickly to changes and opportunities and may grow at a slower rate. Compared to large-cap companies, small- and mid-cap companies may depend on a more limited management group, may have a shorter history of operations, less publicly available information, less stable earnings, and limited product lines, markets or financial resources. The securities of small- and mid-cap companies are often more volatile, which at times can be rapid and unpredictable, and less liquid than the securities of larger companies and may be more affected than other types of securities by the underperformance of a sector, during market downturns, or by adverse publicity and investor perceptions.
Market Volatility Risk. Markets may be volatile and values of individual securities and other investments, including those of a particular type, may decline significantly in response to adverse issuer, political, regulatory, market, economic or other developments that may cause broad changes in market value, public perceptions concerning these developments, and adverse investor sentiment or publicity. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods. If the Fund sells a portfolio position before it reaches its market peak, it may miss out on opportunities for better performance.
Recent Market Conditions. National economies are substantially interconnected, as are global financial markets, which creates the possibility that conditions in one country or region might adversely impact issuers in a different country or region. Some countries, including the U.S., have in recent years adopted more protectionist trade policies. The rise in protectionist trade policies, changes to some major international trade agreements and the potential for changes to others, could affect the economies of many nations in ways that cannot necessarily be foreseen at the present time. Equity markets in the U.S. and China have been very sensitive to the outlook for resolving the U.S.-China “trade war,” a trend that may continue in the future.
High public debt in the U.S. and other countries creates ongoing systemic and market risks and policymaking uncertainty, and there may be a further increase in public debt due to the economic effects of the COVID-19 pandemic and ensuing economic relief and public health measures. Governments and central banks have moved to limit the potential negative economic effects of the COVID-19 pandemic with interventions that are unprecedented in size and scope and may continue to do so, but the ultimate impact of these efforts is uncertain. Governments’ efforts to limit potential negative economic effects of the pandemic may be altered, delayed, or eliminated at inopportune times for political, policy or other reasons. Interest rates have been unusually low in recent years in the U.S. and abroad, and central banks have reduced rates further in an effort to combat the economic effects of the COVID-19 pandemic. Because there is little precedent for this situation, it is difficult to predict the impact on various markets of a significant rate increase or other significant policy changes, perhaps in response to indications of increasing inflation. Over the longer term, rising interest rates may present a greater risk than has historically been the case due to the current period of relatively low rates and the effect of government fiscal and monetary policy initiatives and potential market reaction to those initiatives or their alteration or cessation.
The impact of the pandemic has negatively affected and may continue to affect the economies of many nations, individual companies and the global securities and commodities markets, including their liquidity, in ways that cannot necessarily be foreseen at the present time. The pandemic has accelerated trends toward working remotely and shopping on-line, which may negatively affect the value of office and commercial real estate and companies that have been slow to transition to an on-line business model, and has disrupted the supply chains that many businesses depend on. The travel, hospitality and public transit industries may suffer long-term negative effects from the pandemic and resulting changes to public behavior.
Funds and their advisers, as well as many of the companies in which they invest, are subject to regulation by the federal government. Over the past several years, the U.S. has moved away from tighter industry regulation, a trend that appears to be changing. Increased regulation may impose added costs on the Fund and its service providers for monitoring and compliance, and affect the businesses of various portfolio companies, in ways that cannot necessarily be foreseen at the present time.
Climate Change. There is widespread concern about the potential effects of global climate change on property and security values. A rise in sea levels, an increase in powerful windstorms and/or a climate-driven increase in flooding could cause coastal properties to lose value or become unmarketable altogether. Unlike previous declines in the real estate market, properties in affected coastal zones may not ever recover their value. Large wildfires driven by high winds and prolonged drought may devastate businesses and entire communities and may be very costly to any business found to be responsible for the fire. The U.S. administration appears concerned about the climate change problem and is focusing
regulatory and public works projects around those concerns. Regulatory changes tied to concerns about climate change could adversely affect the value of certain land and the viability of certain industries.
Losses related to climate change could adversely affect corporate issuers and mortgage lenders, the value of mortgage-backed securities, the bonds of municipalities that depend on tax or other revenues and tourist dollars generated by affected properties, and insurers of the property and/or of corporate, municipal or mortgage-backed securities. Since property and security values are driven largely by buyers’ perceptions, it is difficult to know the time period over which these market effects might unfold.
Redemption Risk. The Fund may experience periods of large or frequent redemptions that could cause the Fund to sell assets at inopportune times, which could have a negative impact on the Fund’s overall liquidity, or at a loss or depressed value. Redemption risk is greater to the extent that one or more investors or intermediaries control a large percentage of investments in the Fund and the risk is heightened during periods of declining or illiquid markets. Large redemptions could hurt the Fund’s performance, increase transaction costs, and create adverse tax consequences.
Sector Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events.
Securities Lending Risk. Securities lending involves a possible delay in recovery of the loaned securities or a possible loss of rights in the collateral should the borrower fail financially. The Fund could also lose money if the value of the collateral decreases.
Value Stock Risk. Value stocks may remain undervalued for extended periods of time, may decrease in value during a given period, may not ever realize what the portfolio management team believes to be their full value, or the portfolio management team’s assumptions about intrinsic value or potential for appreciation may be incorrect. This may happen, among other reasons, because of a failure to anticipate which stocks or industries would benefit from changing market or economic conditions or investor preferences.
A summary of the Fund’s additional principal investment risks is as follows:
Risk of Increase in Expenses. A decline in the Fund’s average net assets during the current fiscal year due to market volatility or other factors could cause the Fund’s expenses for the current fiscal year to be higher than the expense information presented in “Fees and Expenses.”
Operational and Cybersecurity Risk. The Fund and its service providers, and your ability to transact with the Fund, may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. Cybersecurity incidents can result from deliberate attacks or unintentional events. It is not possible for the Manager or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
Risk Management. Risk is an essential part of investing. No risk management program can eliminate the Fund’s exposure to adverse events; at best, it may only reduce the possibility that the Fund will be affected by such events, and especially those risks that are not intrinsic to the Fund’s investment program. The Fund could experience losses if judgments about risk prove to be incorrect.
Valuation Risk. The Fund may not be able to sell an investment at the price at which the Fund has valued the investment. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. If market or other conditions make it difficult to value some investments, SEC rules and applicable accounting protocols may require the Fund to value these investments using more subjective methods, known as fair value methodologies. Using fair value methodologies to price investments may result in a value that is different from an investment’s most recent price and from the prices used by other mutual funds to calculate their NAVs. The Fund’s ability to
value its investments in an accurate and timely manner may be impacted by technological issues and/or errors by third party service providers, such as pricing services or accounting agents.
Risk Lose Money [Text] rr_RiskLoseMoney The value of your investment may fall, sometimes sharply, and you could lose money by investing in the Fund.
RIsk Not Insured [Text] rr_RiskNotInsured The Fund is a mutual fund, not a bank deposit, and is not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table provide an indication of the risks of investing in the Fund. The bar chart shows how the Fund’s performance has varied from year to year, as represented by the performance of the Fund's Institutional Class. The returns in the bar chart do not reflect any applicable sales charges. If sales charges were reflected, returns would be lower than those shown. The table below the bar chart shows what the returns would equal if you averaged out actual performance over various lengths of time and compares the returns with the returns of a broad-based market index. The index, which is described in “Descriptions of Indices” in the prospectus, has characteristics relevant to the Fund's investment strategy. Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.
Returns would have been lower if the Manager had not reimbursed certain expenses and/or waived a portion of the investment management fees during certain of the periods shown.
Past performance (before and after taxes) is not a prediction of future results. Visit www.nb.com or call 800-366-6264 for updated performance information.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart shows how the Fund’s performance has varied from year to year, as represented by the performance of the Fund's Institutional Class. The table below the bar chart shows what the returns would equal if you averaged out actual performance over various lengths of time and compares the returns with the returns of a broad-based market index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-366-6264
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.nb.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not a prediction of future results.
Bar Chart [Heading] rr_BarChartHeading year-by-year % Returns as of 12/31 each year
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The returns in the bar chart do not reflect any applicable sales charges. If sales charges were reflected, returns would be lower than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter:    Q2 '20, 20.85%
Worst quarter:    Q1 '20, -22.26%
Year-to-date performance as of 9/30/2021:     9.65%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date performance as of 9/30/2021:
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2021
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 9.65%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 20.85%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (22.26%)
Performance Table Heading rr_PerformanceTableHeading average annual total % returns as of 12/31/20
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest 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 After-tax returns are not relevant to investors who hold their 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 Institutional Class shares only and after-tax returns for other classes may vary.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
After-tax returns are shown for Institutional Class shares only and after-tax returns for other classes may vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Average Annual Return, Caption rr_AverageAnnualReturnCaption International Select Fund
Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) | Neuberger Berman International Select Fund | MSCI EAFE® Index (Net) (reflects reinvested dividends net of withholding taxes, but reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 7.82%
5 Years rr_AverageAnnualReturnYear05 7.45%
10 Years rr_AverageAnnualReturnYear10 5.51%
Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) | Neuberger Berman International Select Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum initial sales charge on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum contingent deferred sales charge (as a % of the lower of original purchase price or current market value) rr_MaximumDeferredSalesChargeOverOther none [1]
Management fees rr_ManagementFeesOverAssets 0.81%
Distribution and/or shareholder service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.28%
Total annual operating expenses rr_ExpensesOverAssets 1.34%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.17%
Total annual operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.17% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 687
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 925
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,218
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,051
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 687
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 925
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,218
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,051
1 Year rr_AverageAnnualReturnYear01 8.46%
5 Years rr_AverageAnnualReturnYear05 7.76%
10 Years rr_AverageAnnualReturnYear10 5.34%
Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) | Neuberger Berman International Select Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum initial sales charge on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (as a % of the lower of original purchase price or current market value) rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Management fees rr_ManagementFeesOverAssets 0.81%
Distribution and/or shareholder service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.31%
Total annual operating expenses rr_ExpensesOverAssets 2.12%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.20%
Total annual operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 1.92% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 295
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 603
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,081
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,401
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 195
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 603
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,081
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,401
1 Year rr_AverageAnnualReturnYear01 13.10%
5 Years rr_AverageAnnualReturnYear05 8.21%
10 Years rr_AverageAnnualReturnYear10 5.17%
Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) | Neuberger Berman International Select Fund | Institutional  
Risk/Return: rr_RiskReturnAbstract  
Maximum initial sales charge on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (as a % of the lower of original purchase price or current market value) rr_MaximumDeferredSalesChargeOverOther none [1]
Management fees rr_ManagementFeesOverAssets 0.70%
Distribution and/or shareholder service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.27%
Total annual operating expenses rr_ExpensesOverAssets 0.97%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.16%
Total annual operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.81% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 259
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 487
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,143
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 83
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 259
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 487
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,143
Annual Return 2011 rr_AnnualReturn2011 (11.36%)
Annual Return 2012 rr_AnnualReturn2012 16.33%
Annual Return 2013 rr_AnnualReturn2013 17.27%
Annual Return 2014 rr_AnnualReturn2014 (2.90%)
Annual Return 2015 rr_AnnualReturn2015 0.32%
Annual Return 2016 rr_AnnualReturn2016 (1.03%)
Annual Return 2017 rr_AnnualReturn2017 27.55%
Annual Return 2018 rr_AnnualReturn2018 (14.79%)
Annual Return 2019 rr_AnnualReturn2019 26.48%
Annual Return 2020 rr_AnnualReturn2020 15.41%
1 Year rr_AverageAnnualReturnYear01 15.41%
5 Years rr_AverageAnnualReturnYear05 9.44%
10 Years rr_AverageAnnualReturnYear10 6.34%
Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) | Neuberger Berman International Select Fund | Institutional | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.01%
5 Years rr_AverageAnnualReturnYear05 8.96%
10 Years rr_AverageAnnualReturnYear10 5.95%
Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) | Neuberger Berman International Select Fund | Institutional | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.39%
5 Years rr_AverageAnnualReturnYear05 7.40%
10 Years rr_AverageAnnualReturnYear10 5.03%
[1] For Class A shares, a contingent deferred sales charge (“CDSC”) of 1.00% applies on certain redemptions made within 18 months following purchases of $1 million or more made without an initial sales charge. For Class C shares, the CDSC is eliminated one year after purchase.
[2] Neuberger Berman Investment Advisers LLC (“Manager”) has contractually undertaken to waive and/or reimburse certain fees and expenses of Class A, Class C and Institutional Class so that the total annual operating expenses (excluding interest, taxes, brokerage commissions, acquired fund fees and expenses, dividend and interest expenses relating to short sales, and extraordinary expenses, if any) (“annual operating expenses”) of each class are limited to 1.16%, 1.91% and 0.80% of average net assets, respectively. Each of these undertakings lasts until 8/31/2025 and may not be terminated during its term without the consent of the Board of Trustees. The Fund has agreed that each of Class A, Class C and Institutional Class will repay the Manager for fees and expenses waived or reimbursed for the class provided that repayment does not cause annual operating expenses to exceed 1.16%, 1.91% and 0.80% of the class’ average net assets, respectively. Any such repayment must be made within three years after the year in which the Manager incurred the expense.