v3.23.4
Label Element Value
Risk Return Abstract rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName HARBOR FUNDS II
Prospectus Date rr_ProspectusDate Jan. 19, 2024
Embark Small Cap Equity Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading <span style="color:#FFFFFF;font-family:Times New Roman;font-size:18pt;">Embark Small Cap Equity Fund</span><span style="color:#FFFFFF;font-family:Arial;font-size:16pt;font-weight:bold;">Fund Summary</span>
Objective [Heading] rr_ObjectiveHeading <span style="color:#004DD6;font-family:Arial Narrow;font-size:14pt;font-weight:bold;">Investment Objective</span>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund seeks long-term growth of capital.
Expense [Heading] rr_ExpenseHeading <span style="color:#004DD6;font-family:Arial Narrow;font-size:14pt;font-weight:bold;">Fees and Expenses of the Fund</span>
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 Fund. 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.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-weight:bold;">Annual Fund Operating Expenses</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;"> (expenses that you pay each year as a percentage of the value of your investment)</span>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination <span style="color:#000000;font-family:Times New Roman;font-size:8pt;font-style:italic;">February 28, 2025</span>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-weight:bold;margin-left:4pt;">Portfolio Turnover</span>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The Fund pays transaction costs, such as commissions, when it buys and sells securities or other financial instruments (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. The Fund had not commenced operations as of the date of this Prospectus and no portfolio turnover rate existed at the time of this publication.
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates <span style="color:#000000;font-family:Times New Roman;font-size:8pt;font-style:italic;">“Other Expenses” are estimated for the current fiscal year.</span>
Expense Example [Heading] rr_ExpenseExampleHeading <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-weight:bold;margin-left:4pt;">Expense Example</span>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same (except that the Example incorporates the expense reimbursement arrangement only for the contractual period). Although your actual costs may be higher or lower, under these assumptions, your costs would be:
Strategy [Heading] rr_StrategyHeading <span style="color:#004DD6;font-family:Arial Narrow;font-size:14pt;font-weight:bold;">Principal Investment Strategy</span>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock Under normal circumstances, the Fund invests at least 80% of its net assets, plus borrowings for investment purposes, in equity securities of small cap companies. “Equity securities” for this purpose include all types of equity securities, whether issued by U.S. or non-U.S. issuers, although the Fund invests primarily in common stocks of U.S. issuers. The Fund defines small cap companies as those having a market capitalization, at the time of purchase, within the range of the Russell 2000® Index (the “Index”), provided that for the purposes of this definition, the upper end of that range will be the higher of: (i) the largest market capitalization of the current Index or (ii) the average of the largest month-end capitalizations over the trailing 12 months. As of December 31, 2023, the range of the Index was $10 million to $15.1 billion and the trailing 12-month average of the largest month-end capitalizations is $12.4 billion. Accordingly, as of December 31, 2023, the upper end of the range used for purposes of the small cap company definition was $15.1 billion. The Index is reconstituted annually on the last Friday of each June. The market value of derivatives that have economic characteristics similar to equity securities of small cap companies will be counted for purposes of investing at least 80% of the Fund’s net assets in such securities.The Fund employs a multi-manager approach to achieve its investment objective. The Fund’s investment adviser, Harbor Capital Advisors, Inc. (the “Advisor”) is responsible for selecting and overseeing investment subadvisers (each, a “Subadvisor”) for the Fund. The Advisor does not expect to independently identify securities for investment for the Fund. Instead, each Subadvisor is responsible for providing the Advisor with a model portfolio, which the Advisor will implement in its discretion in managing the Fund. The Advisor is solely responsible for implementing each strategy, which includes buying and selling securities as recommended by each Subadvisor. The Advisor in its discretion may decline to implement a Subadvisor’s recommendations under certain circumstances, including when the recommended securities are not available in the specific quantities or prices sought or when purchasing such securities in conjunction with the Fund’s existing holdings would violate an investment restriction of the Fund.The Advisor is responsible for determining the allocation of the Fund’s assets among the Subadvisors’ strategies. The Advisor will adjust those allocations over time based upon its qualitative and quantitative assessment of each strategy and how those strategies work in combination to produce idiosyncratic alpha (i.e. returns resulting from stock selection rather than shifts in the broader market) that compounds over time. Under normal circumstances, the Advisor expects to review the allocations to the Subadvisors’ strategies quarterly.The Advisor has selected Copeland Capital Management, LLC (“Copeland”); Granahan Investment Management LLC (“Granahan”); Hotchkis and Wiley Capital Management, LLC (“Hotchkis and Wiley”); Punch & Associates Investment Management, Inc. (“Punch”); Reinhart Partners LLC (“Reinhart”); Shapiro Capital Management LLC (“Shapiro”); and Westfield Capital Management Company, L.P. (“Westfield”) to each serve as a Subadvisor to the Fund.Each Subadvisor has its own process for identifying and evaluating companies and will act independently from the other Subadvisors. A Subadvisor will generally identify securities for its model portfolio by analyzing issuers based on factors such as financial performance, industry position, growth expectations or other investment considerations. A Subadvisor will remove securities from its model portfolio for which its outlook has changed or when it has identified more attractive investment prospects. The factors considered and the importance of various considerations vary by Subadvisor.The Fund may invest in securities issued by publicly traded or non-listed real estate investment trusts (REITs). The Fund may also invest in common stocks of foreign issuers, including emerging market issuers. The Fund may invest in securities denominated in, and/or receiving revenues in, foreign currencies. Foreign securities are typically expected to represent approximately 10% or fewer of the Fund’s assets. The Fund may also invest in American Depositary Receipts (ADRs), which are certificates typically issued by a bank or trust company that represent ownership interests in securities issued by a foreign or domestic company.
Risk [Heading] rr_RiskHeading <span style="color:#004DD6;font-family:Arial Narrow;font-size:14pt;font-weight:bold;">Principal Risks</span>
Risk [Text Block] rr_RiskTextBlock American Depositary Receipts Risk: American depositary receipts are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the U.S. The underlying shares are held in trust by a custodian bank or similar financial institution. The depository bank may not have physical custody of the underlying securities at all times and may charge fees for various services, including forwarding dividends and interest and corporate actions. American depositary receipts are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. American depositary receipts are subject to the risks associated with investing directly in foreign securities.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <span style="color:#004DD6;font-family:Arial Narrow;font-size:14pt;font-weight:bold;">Performance</span>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess <span style="color:#000000;font-family:Times New Roman;font-size:9pt;margin-left:0%;">Because the Fund is newly organized and does not yet have a </span><span style="color:#000000;font-family:Times New Roman;font-size:9pt;">complete calendar year of performance history, the bar chart and total return tables are not provided. </span>
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone <span style="color:#000000;font-family:Times New Roman;font-size:9pt;">800-422-1050</span>
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress <span style="color:#000000;font-family:Times New Roman;font-size:9pt;">harborcapital.com</span>
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture <span style="color:#000000;font-family:Times New Roman;font-size:9pt;">Please note that the Fund’s </span><span style="color:#000000;font-family:Times New Roman;font-size:9pt;">past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.</span>
Embark Small Cap Equity Fund | Risk Lose Money [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options.
Embark Small Cap Equity Fund | Small Cap Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Small Cap Risk: The Fund’s performance may be more volatile because it invests primarily in issuers that are smaller companies. Smaller companies may have limited product lines, markets and financial resources. Securities of smaller companies are usually less stable in price and less liquid than those of larger, more established companies. Additionally, small cap stocks may fall out of favor relative to mid or large cap stocks, which may cause the Fund to underperform other equity funds that focus on mid or large cap stocks.
Embark Small Cap Equity Fund | Equity Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Equity Risk: The values of equity securities (such as common stocks) may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Embark Small Cap Equity Fund | Market Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities or other financial instruments held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Embark Small Cap Equity Fund | Multi-Manager Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Multi-Manager Risk: The Subadvisors’ investment styles and security recommendations may not always be complementary, which could affect the performance of the Fund. Moreover, the allocation of Fund assets among Subadvisors may lead the Fund to underperform relative to how it could have performed with a different allocation between Subadvisors.
Embark Small Cap Equity Fund | Non-Discretionary Implementation Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Non-Discretionary Implementation Risk: Because the Fund is managed pursuant to model portfolios provided by non-discretionary Subadvisors that construct the model portfolios but have no authority to effect trades for the Fund’s portfolio, it is expected that the Advisor will effect trades on a periodic basis as the Advisor receives the model portfolios, and therefore less frequently than would typically be the case if the Fund employed discretionary subadvisors that effected trades for the Fund’s portfolio directly. Given that values of investments change with market conditions, a trade may ultimately be less advantageous for the Fund at the time of implementation than it would have been if it were implemented at the time the non-discretionary Subadvisor included it in its model portfolio. This could cause the Fund’s return to be lower than if the Fund employed discretionary subadvisors.
Embark Small Cap Equity Fund | Foreign Securities Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Foreign Securities Risk: Because the Fund may invest in common stocks of foreign issuers, as well as depositary receipts, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
Embark Small Cap Equity Fund | Issuer Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Embark Small Cap Equity Fund | New Fund Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Embark Small Cap Equity Fund | REIT Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock REIT Risk: Investing in REITs will subject the Fund to additional risks.  The REITs in which the Fund invests may decline in value as a result of factors affecting the real estate sector, such as changes in real estate values, changes in property taxes and government regulation affecting zoning, land use and rents, changes in interest rates, changes in the cash flow of underlying real estate assets, levels of occupancy, and market conditions, as well as the management skill and creditworthiness of the issuer.  Investments in REITs are also subject to additional risks, including the risk that REITs are unable to generate cash flow to make distributions to unitholders and fail to qualify for favorable tax treatment under the Internal Revenue Code of 1986, as amended. Non-listed REITs entail certain risks that publicly traded REITs generally do not. Non-listed REITs are typically less financially stable than publicly traded REITs. Non-listed REITs are unlisted, making them hard to value and trade. Moreover, non-listed REITs generally are exempt from registration under the Securities Act of 1933 and, as such, are not subject to the same disclosure requirements as publicly traded REITs, which makes non-listed REITs more difficult to evaluate from an investment perspective.
Embark Small Cap Equity Fund | Selection Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Selection Risk: The Subadvisor’s judgment about the attractiveness, value and growth potential of a particular security may be incorrect, which may cause the Fund to underperform.  The Advisor potentially will be prevented from implementing model portfolio recommendations at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that the Advisor believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by the Advisor and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
Embark Small Cap Equity Fund | Retirement Class  
Risk Return Abstract rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.58%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.19% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.77%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%)
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.61% [2]
OneYear rr_ExpenseExampleYear01 $ 62
ThreeYears rr_ExpenseExampleYear03 $ 229
Embark Small Cap Equity Fund | Institutional Class  
Risk Return Abstract rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.58%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.27% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.85%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%)
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.69% [2]
OneYear rr_ExpenseExampleYear01 $ 70
ThreeYears rr_ExpenseExampleYear03 $ 254
[1] “Other Expenses” are estimated for the current fiscal year.
[2] The Advisor has contractually agreed to limit the Fund’s operating expenses, excluding interest expense (if any), to 0.61% and 0.69% for the Retirement and Institutional share classes, respectively, through February 28, 2025. Only the Fund’s Board of Trustees may modify or terminate this agreement.