Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Prudential Investment Portfolios, Inc. 15
Prospectus Date	rr_ProspectusDate	Oct. 30, 2023
PGIM High Yield Fund
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#545454;font-family:Arial;font-size:13.58pt;">FUND SUMMARY</span>
Objective [Heading]	rr_ObjectiveHeading	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;text-transform:uppercase;">INVESTMENT OBJECTIVES</span>
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The investment objective of the Fund is to maximize current income. As a secondary investment objective, the Fund will seek capital appreciation, but only when consistent with the Fund's primary investment objective of current income.
Objective, Secondary [Text Block]	rr_ObjectiveSecondaryTextBlock	As a secondary investment objective, the Fund will seek capital appreciation, but only when consistent with the Fund's primary investment objective of current income.
Expense [Heading]	rr_ExpenseHeading	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;text-transform:uppercase;">FUND FEES AND EXPENSES</span>
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The tables below describe the sales charges, 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 tables and examples below. You may be required to pay commissions to a broker for transactions in Class Z shares, which are not reflected in the table or the example below.You may qualify for sales charge discounts if you and an eligible group of related investors purchase, or agree to purchase in the future, $100,000 or more in shares of the Fund or other funds in the PGIM Funds family. More information about these discounts as well as other waivers or discounts is available from your financial professional and is explained in Reducing or Waiving Class A's and Class C’s Sales Charges on page 31 of the Fund's Prospectus, Appendix A: Waivers and Discounts Available From Certain Financial Intermediaries on page 54 of the Fund's Prospectus and in Rights of Accumulation on page 65 of the Fund's Statement of Additional Information (“SAI”).
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	<span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:3pt;">Shareholder Fees (fees paid directly from your investment)</span>
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	<span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:3pt;">Annual Fund Operating Expenses (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="font-family:Arial Narrow;font-size:8pt;">December 31, </span><span style="font-family:Arial Narrow;font-size:8pt;">2024</span>
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	<span style="font-family:Arial;font-size:9.70pt;font-weight:bold;">Portfolio Turnover. </span>
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 fund operating expenses or in the example, affect the Fund's performance. During the Fund's most recent fiscal year, the Fund's portfolio turnover rate was 22% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	22.00%
Expenses Deferred Charges [Text Block]	rr_ExpensesDeferredChargesTextBlock	Investors who purchase $500,000 or more of Class A shares and sell these shares within 12 months of purchase are subject to a contingent deferred sales charge (“CDSC”) of 1.00%, although they are not subject to an initial sales charge. The CDSC is waived for certain retirement and/or benefit plans.Class C shares are sold with a CDSC of 1.00% on sales made within 12 months of purchase.
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	<span style="color:#000000;font-family:Arial;font-size:9.70pt;">You may qualify for sales charge discounts if you and an eligible group of related investors purchase, or agree to purchase in the future, </span><span style="color:#000000;font-family:Arial;font-size:9.70pt;">$100,000</span><span style="color:#000000;font-family:Arial;font-size:9.70pt;"> or more in shares of the Fund or other funds in the PGIM Funds family.</span>
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 100,000
Expense Example [Heading]	rr_ExpenseExampleHeading	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;">Example. </span>
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The following hypothetical example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. It assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year, that the Fund's operating expenses remain the same (except that fee waivers or reimbursements, if any, are only reflected in the 1-Year figures) and that all dividends and distributions are reinvested. Your actual costs may be higher or lower.
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	<span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:3pt;">If Shares Are Redeemed</span>
Expense Example, No Redemption, By Year, Caption [Text]	rr_ExpenseExampleNoRedemptionByYearCaption	<span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:3pt;">If Shares Are Not Redeemed</span>
Strategy [Heading]	rr_StrategyHeading	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;text-transform:uppercase;">INVESTMENTS, RISKS AND PERFORMANCE</span><span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;">Principal Investment Strategies. </span>
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	To achieve the Fund's income objective, the Fund invests, under normal circumstances, at least 80% of the its investable assets in a diversified portfolio of high yield fixed income instruments rated Ba or lower by Moody's Investors Service, Inc. (“Moody's”) or BB or lower by S&P Global Ratings (“S&P”), and instruments either comparably rated by another nationally recognized statistical rating organization (“NRSRO”), or considered by the subadviser to be of comparable quality, that is, junk bonds. Such instruments also include other investments (including derivatives) with similar economic characteristics. The term “investable assets” refers to the Fund's net assets plus any borrowings for investment purposes. The Fund's investable assets will be less than its total assets to the extent that it has borrowed money for non-investment purposes, such as to meet anticipated redemptions.The Fund may invest up to 20% of its investable assets in U.S. currency-denominated fixed income securities of foreign governments and other foreign issuers, including Brady Bonds, which are long-term bonds issued by developing nations, and preferred stock. The Fund may also invest up to 10% of its investable assets in foreign currency-denominated fixed income securities issued by foreign or domestic issuers. Foreign government fixed income securities include securities issued by quasi-governmental entities, governmental agencies, supranational entities and other governmental entities.The Fund may use various derivative strategies to try to improve the Fund’s returns. The subadviser may also use hedging techniques to try to protect the Fund’s assets. Although the Fund has the flexibility to make use of derivatives, it may choose not to for a variety of reasons, even under very volatile market conditions. The Fund’s investments in foreign issuers may include issuers located anywhere in the world, including emerging markets. From time to time the Fund’s investments may be concentrated in a geographic region or country.In managing the Fund’s assets, the subadviser uses a combination of top-down economic analysis and bottom-up research in conjunction with proprietary quantitative models and risk management systems. In the top-down economic analysis, the subadviser develops views on economic, policy and market trends by continually evaluating economic data that affect the movement of markets and securities prices. In its bottom-up research, the subadviser develops an internal rating and outlook on issuers. The rating and outlook are determined based on a thorough review of the financial health and trends of the issuer. The subadviser may also consider investment factors such as expected total return, yield, spread and potential for price appreciation as well as credit quality, maturity and risk. The Fund may invest in a security based upon the expected total return rather than the yield of such security. The subadviser generally will employ fundamental analysis in making such determinations. Fundamental analysis involves review of financial statements and other data to attempt to predict an issuer’s prospects and to try to decide whether the price of the issuer’s security is undervalued or overvalued.
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;">Principal Risks. </span>
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;">Performance.</span>
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following bar chart shows the Fund's performance for Class Z shares for each full calendar year of operations or for the last 10 calendar years, whichever is shorter. The following table shows the Fund's average annual returns and also compares the Fund’s performance with the average annual total returns of an index or other benchmark. The bar chart and table demonstrate the risk of investing in the Fund by showing how returns can change from year to year.Past performance (before and after taxes) does not mean that the Fund will achieve similar results in the future.Without the management fee waiver and/or expense reimbursement, if any, the annual total returns would have been lower. Updated Fund performance information, including current net asset value, is available online at www.pgim.com/investments.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	<span style="color:#000000;font-family:Arial;font-size:9.70pt;">The following table shows the Fund's average annual </span><span style="color:#000000;font-family:Arial;font-size:9.70pt;">returns and also compares the Fund’s performance with the average annual total returns of an index or other benchmark. The bar chart and table demonstrate the risk of investing in the Fund by showing how returns can change from year to year.</span>
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	<span style="color:#000000;font-family:Arial;font-size:9.70pt;">www.pgim.com/investments</span>
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	<span style="color:#000000;font-family:Arial;font-size:9.70pt;">Past performance (before and after taxes) does not mean that the Fund will achieve similar results in the future.</span>
Bar Chart [Heading]	rr_BarChartHeading	Annual Total Returns (Class Z Shares)
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Best Quarter:Worst Quarter:10.64%2nd Quarter 2020-14.17%1st Quarter 2020The total return for Class Z shares from January 1, 2023 toSeptember 30, 2023was4.95%
Performance Table Heading	rr_PerformanceTableHeading	<span style="font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:3pt;">Average Annual Total Returns % (including sales charges) (as of 12-31-</span><span style="font-family:Arial Narrow;font-size:8pt;font-weight:bold;">22)</span>
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	<span style="color:#000000;font-family:Arial Narrow;font-size:8pt;">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.</span>
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	<span style="color:#000000;font-family:Arial Narrow;font-size:8pt;">After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred </span><span style="color:#000000;font-family:Arial Narrow;font-size:8pt;">arrangements, such as 401(k) plans or individual retirement accounts.</span>
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	<span style="color:#000000;font-family:Arial Narrow;font-size:8pt;">After-tax returns are shown only for Class Z shares. After-tax returns for other classes will vary due to differing sales charges and expenses.</span>
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	° 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 shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.After-tax returns are shown only for Class Z shares. After-tax returns for other classes will vary due to differing sales charges and expenses.
PGIM High Yield Fund | Risk Lose Money [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	You may lose part or all of your investment in the Fund or your investment may not perform as well as other similar investments.
PGIM High Yield Fund | Risk Not Insured Depository Institution [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	An investment in the Fund is not guaranteed to achieve its investment objective; is not a deposit with a bank; and is not insured, endorsed or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
PGIM High Yield Fund | Covenant Lite Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	“Covenant-Lite” Risk. Some of the loans or debt obligations in which the Fund may invest or get exposure to may be “covenant-lite”, which means the loans or obligations contain fewer financial maintenance covenants than other loans or obligations (in some cases, none) and do not include terms which allow the lender to monitor the borrower’s performance and declare a default if certain criteria are breached. An investment by the Fund in a covenant-lite loan may potentially hinder the ability to reprice credit risk associated with the issuer and reduce the ability to restructure a problematic loan and mitigate potential loss. The Fund may also experience difficulty, expenses or delays in enforcing its rights on its holdings of covenant-lite loans or obligations. As a result of these risks, the Fund’s exposure to losses may be increased, which could result in an adverse impact on the Fund’s net income and NAV.
PGIM High Yield Fund | Credit Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Credit Risk. This is the risk that the issuer, the guarantor, or the insurer of a fixed income security, or the counterparty to a contract may be unable or unwilling to make timely principal and interest payments or to otherwise honor its obligations. Additionally, fixed income securities could lose value due to a loss of confidence in the ability of the issuer, guarantor, insurer, or counterparty to pay back debt. The lower the credit quality of a bond, the more sensitive it is to credit risk.
PGIM High Yield Fund | Debt Obligations Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Debt Obligations Risk. Debt obligations are subject to credit risk, market risk and interest rate risk. The Fund's holdings, share price, yield and total return may also fluctuate in response to bond market movements. The value of bonds may decline for issuer-related reasons, including management performance, financial leverage and reduced demand for the issuer’s goods and services. Certain types of fixed income obligations also may be subject to “call and redemption risk,”which is the risk that the issuer may call a bond held by the Fund for redemption before it matures and the Fund may not be able to reinvest at the same rate of interest and therefore would earn less income.
PGIM High Yield Fund | Derivatives Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Derivatives Risk. Derivatives involve special risks and costs and may result in losses to the Fund. The successful use of derivatives requires sophisticated management, and, to the extent that derivatives are used, the Fund will depend on the subadviser’s ability to analyze and manage derivatives transactions. The prices of derivatives may move in unexpected ways, especially in abnormal market conditions. Some derivatives are “leveraged” or may create economic leverage for the Fund and therefore may magnify or otherwise increase investment losses to the Fund. The Fund's use of derivatives may also increase the amount of taxes payable by shareholders.Other risks arise from the potential inability to terminate or sell derivatives positions. A liquid secondary market may not always exist for the Fund's derivatives positions. In fact, many over-the-counter derivative instruments will not have liquidity beyond the counterparty to the instrument. Over-the-counter derivative instruments also involve the risk that the other party will not meet its obligations to the Fund. The use of derivatives also exposes the Fund to operational issues, such as documentation and settlement issues, systems failures, inadequate control and human error.Derivatives may also involve legal risks, such as insufficient documentation, the lack of capacity or authority of a counterparty to execute or settle a transaction, and the legality and enforceability of derivatives contracts. The U.S. Government and foreign governments have adopted (and may adopt further) regulations governing derivatives markets, including mandatory clearing of certain derivatives, margin and reporting requirements and risk exposure limitations. Regulation of derivatives may make derivatives more costly, limit their availability or utility to the Fund, or otherwise adversely affect their performance or disrupt markets.
PGIM High Yield Fund | Economic And Market Events Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Economic and Market Events Risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth or the functioning of the securities markets, or otherwise reduce inflation, may at times result in unusually high market volatility, which could negatively impact performance. Governmental efforts to curb inflation often have negative effects on the level of economic activity. Relatively reduced liquidity in credit and fixed income markets could adversely affect issuers worldwide.
PGIM High Yield Fund | Emerging Markets Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Emerging Markets Risk. The risks of foreign investments are greater for investments in or exposed to emerging markets. Emerging market countries typically have economic and political systems that are less fully developed, and can be expected to be less stable, than those of more developed countries. For example, the economies of such countries can be subject to rapid and unpredictable rates of inflation or deflation. Low trading volumes may result in a lack of liquidity and price volatility. Emerging market countries may have policies that restrict investment by non-U.S. investors, or that prevent non-U.S. investors from withdrawing their money at will.The Fund may invest in some emerging markets that subject it to risks such as those associated with illiquidity, custody of assets, different settlement and clearance procedures and asserting legal title under a developing legal and regulatory regime to a greater degree than in developed markets or even in other emerging markets.
PGIM High Yield Fund | Foreign Securities Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Foreign Securities Risk. Investments in securities of non-U.S. issuers (including those denominated in U.S. dollars) may involve more risk than investing in securities of U.S. issuers. Foreign political, economic and legal systems, especially those in developing and emerging market countries, may be less stable and more volatile than in the United States. Foreign legal systems generally have fewer regulatory requirements than the U.S. legal system, particularly those of emerging markets. In general, less information is publicly available with respect to non-U.S. companies than U.S. companies. Non-U.S. companies generally are not subject to the same accounting, auditing, and financial reporting standards as are U.S. companies. Additionally, the changing value of foreign currencies and changes in exchange rates could also affect the value of the assets the Fund holds and the Fund's performance. Certain foreign countries may impose restrictions on the ability of issuers of foreign securities to make payment of principal and interest or dividends to investors located outside the country, due to blockage of foreign currency exchanges or otherwise. Investments in emerging markets are subject to greater volatility and price declines.In addition, the Fund's investments in non-U.S. securities may be subject to the risks of nationalization or expropriation of assets, imposition of currency exchange controls or restrictions on the repatriation of non-U.S. currency, confiscatory taxation and adverse diplomatic developments. Special U.S. tax considerations may apply.
PGIM High Yield Fund | Increase In Expenses Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Increase in Expenses Risk. Your actual cost of investing in the Fund may be higher than the expenses shown in the expense table for a variety of reasons. For example, expense ratios may be higher than those shown if average net assets decrease. Net assets are more likely to decrease and Fund expense ratios are more likely to increase when markets are volatile. Active and frequent trading of Fund securities can increase expenses.
PGIM High Yield Fund | Interest Rate Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Interest Rate Risk. The value of your investment may go down when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term or duration debt securities. Similarly, a rise in interest rates may also have a greater negative impact on the value of equity securities whose issuers expect earnings further out in the future. For example, a fixed income security with a duration of three years is expected to decrease in value by approximately 3% if interest rates increase by 1%. This is referred to as “duration risk.” When interest rates fall, the issuers of debt obligations may prepay principal more quickly than expected, and the Fund may be required to reinvest the proceeds at a lower interest rate. This is referred to as “prepayment risk.” When interest rates rise, debt obligations may be repaid more slowly than expected, and the value of the Fund's holdings may fall sharply. This is referred to as “extension risk.”The Fund may lose money if short-term or long-term interest rates rise sharply or in a manner not anticipated by the subadviser.
PGIM High Yield Fund | Junk Bonds Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Junk Bonds Risk. High-yield, high-risk bonds have predominantly speculative characteristics, including particularly high credit risk. Junk bonds tend to have lower market liquidity than higher-rated securities. The liquidity of particular issuers or industries within a particular investment category may shrink or disappear suddenly and without warning. The non-investment grade bond market can experience sudden and sharp price swings and become illiquid due to a variety of factors, including changes in economic forecasts, stock market activity, large sustained sales by major investors, a high profile default or a change in the market's psychology.
PGIM High Yield Fund | Large Shareholder And Large Scale Redemption Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Large Shareholder and Large Scale Redemption Risk. Certain individuals, accounts, funds (including funds affiliated with the Manager) or institutions, including the Manager and its affiliates, may from time to time own or control a substantial amount of the Fund’s shares. There is no requirement that these entities maintain their investment in the Fund. There is a risk that such large shareholders or that the Fund’s shareholders generally may redeem all or a substantial portion of their investments in the Fund in a short period of time, which could have a significant negative impact on the Fund’s NAV, liquidity, and brokerage costs. Large redemptions could also result in tax consequences to shareholders and impact the Fund’s ability to implement its investment strategy. The Fund’s ability to pursue its investment objective after one or more large scale redemptions may be impaired and, as a result, the Fund may invest a larger portion of its assets in cash or cash equivalents.
PGIM High Yield Fund | Liquidity Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Liquidity Risk. Liquidity risk is the risk that the Fund could not meet requests to redeem shares issued by the Fund without significant dilution of remaining investors' interests in the Fund. The Fund may invest in instruments that trade in lower volumes and are more illiquid than other investments. If the Fund is forced to sell these investments to pay redemption proceeds or for other reasons, the Fund may lose money. In addition, when there is no willing buyer and investments cannot be readily sold at the desired time or price, the Fund may have to accept a lower price or may not be able to sell the instrument at all. 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.
PGIM High Yield Fund | Management Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Management Risk. Actively managed funds are subject to management risk. The subadviser will apply investment techniques and risk analyses in making investment decisions for the Fund, but the subadviser's judgments about the attractiveness, value or market trends affecting a particular security, industry or sector or about market movements may be incorrect. Additionally, the investments selected for the Fund may underperform the markets in general, the Fund's benchmark and other funds with similar investment objectives.
PGIM High Yield Fund | Market Disruption And Geopolitical Risks [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market Disruption and Geopolitical Risks. Market disruption can be caused by economic, financial or political events and factors, including but not limited to, international wars or conflicts (including Russia’s military invasion of Ukraine), geopolitical developments (including trading and tariff arrangements, sanctions and cybersecurity attacks), instability in regions such as Asia, Eastern Europe and the Middle East, terrorism, natural disasters and public health epidemics (including the outbreak of COVID-19 globally).The extent and duration of such events and resulting market disruptions cannot be predicted, but could be substantial and could magnify the impact of other risks to the Fund. These and other similar events could adversely affect the U.S. and foreign financial markets and lead to increased market volatility, reduced liquidity in the securities markets, significant negative impacts on issuers and the markets for certain securities and commodities and/or government intervention. They may also cause short- or long-term economic uncertainties in the United States and worldwide. As a result, whether or not the Fund invests in securities of issuers located in or with significant exposure to the countries directly affected, the value and liquidity of the Fund’s investments may be negatively impacted. Further, due to closures of certain markets and restrictions on trading certain securities, the value of certain securities held by the Fund could be significantly impacted, which could lead to such securities being valued at zero.COVID-19 and the related governmental and public responses have had, and future public health epidemics may have an impact on the Fund’s investments and net asset value, and have led and may lead to increased market volatility and the potential for illiquidity in certain classes of securities and sectors of the market. Future public health epidemics mayresult in periods of business disruption, business closures, inability to obtain raw materials, supplies and component parts, and reduced or disrupted operations for the issuers in which the Fund invests. The occurrence, reoccurrence and pendency of public health epidemics could adversely affect the economies and financial markets either in specific countries or worldwide.
PGIM High Yield Fund | Market Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market Risk. Securities markets may be volatile and the market prices of the Fund’s securities may decline. Securities fluctuate in price based on changes in an issuer’s financial condition and overall market and economic conditions. If the market prices of the securities owned by the Fund fall, the value of your investment in the Fund will decline.
PGIM High Yield Fund | Reference Rate Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Reference Rate Risk. The Fund may be exposed to financial instruments that recently transitioned from using or continue to use the London Interbank Offered Rate (“LIBOR”) or synthetic version thereof to determine payment obligations, financing terms, hedging strategies or investment value.The United Kingdom's Financial Conduct Authority (the “FCA”) announced a phase out of LIBOR such that after June 30, 2023, the overnight, 1-month, 3-month, 6-month and 12-month U.S. dollar LIBOR settings ceased to be published or are no longer representative. All other LIBOR settings and certain other interbank offered rates, such as the Euro Overnight Index Average (“EONIA”), ceased to be published after December 31, 2021. On December 16, 2022, the Federal Reserve Board adopted regulations implementing the Adjustable Interest Rate Act by identifying benchmarkrates based on the Secured Overnight Financing Rate that replaced LIBOR in different categories of financial contracts after June 30, 2023. These regulations apply only to contracts governed by U.S. law, among other limitations. The FCA will permit the use of synthetic U.S. dollar LIBOR rates for non-U.S. contracts through September 30, 2024, but any such rates would be considered non-representative of the underlying market.Neither the effect of the LIBOR transition process nor its ultimate success can yet be known. Not all existing LIBOR-based instruments may have alternative rate-setting provisions and there remains uncertainty regarding the willingness and ability of issuers to add alternative rate-setting provisions in certain existing instruments. Parties to contracts, securities or other instruments using LIBOR may disagree on transition rates or the application of applicable transition regulation, potentially resulting in uncertainty of performance and the possibility of litigation. The Fund may have instruments linked to other interbank offered rates that may also cease to be published in the future.
PGIM High Yield Fund | A
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.25%
Maximum deferred sales charge (load) (as a percentage of the lower of the original purchase price or the net asset value at redemption)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Maximum sales charge (load) imposed on reinvested dividends and other distributions	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption fee	rr_RedemptionFeeOverRedemption	none
Exchange fee	rr_ExchangeFeeOverRedemption	none
Maximum account fee (accounts under $10,000)	rr_MaximumAccountFee	$ 15
Management fee	rr_ManagementFeesOverAssets	0.36%
Distribution or distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Shareholder service fee	rr_Component1OtherExpensesOverAssets	none
Remainder of other expenses	rr_Component2OtherExpensesOverAssets	0.14%
Other expenses:	rr_OtherExpensesOverAssets	0.14%
Total annual Fund operating expenses	rr_ExpensesOverAssets	0.75%
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total annual Fund operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	0.75%	[2],[3]
1 Year	rr_ExpenseExampleYear01	$ 399
3 Years	rr_ExpenseExampleYear03	557
5 Years	rr_ExpenseExampleYear05	728
10 Years	rr_ExpenseExampleYear10	1,225
1 Year	rr_ExpenseExampleNoRedemptionYear01	399
3 Years	rr_ExpenseExampleNoRedemptionYear03	557
5 Years	rr_ExpenseExampleNoRedemptionYear05	728
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,225
One Year	rr_AverageAnnualReturnYear01	(14.74%)
Five Years	rr_AverageAnnualReturnYear05	1.66%
Ten Years	rr_AverageAnnualReturnYear10	3.64%
PGIM High Yield Fund | C
Risk Return Abstract	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 the lower of the original purchase price or the net asset value at redemption)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[4]
Maximum sales charge (load) imposed on reinvested dividends and other distributions	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption fee	rr_RedemptionFeeOverRedemption	none
Exchange fee	rr_ExchangeFeeOverRedemption	none
Maximum account fee (accounts under $10,000)	rr_MaximumAccountFee	$ 15
Management fee	rr_ManagementFeesOverAssets	0.36%
Distribution or distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Shareholder service fee	rr_Component1OtherExpensesOverAssets	none
Remainder of other expenses	rr_Component2OtherExpensesOverAssets	0.11%
Other expenses:	rr_OtherExpensesOverAssets	0.11%
Total annual Fund operating expenses	rr_ExpensesOverAssets	1.47%
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total annual Fund operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	1.47%	[2],[3]
1 Year	rr_ExpenseExampleYear01	$ 250
3 Years	rr_ExpenseExampleYear03	465
5 Years	rr_ExpenseExampleYear05	803
10 Years	rr_ExpenseExampleYear10	1,562
1 Year	rr_ExpenseExampleNoRedemptionYear01	150
3 Years	rr_ExpenseExampleNoRedemptionYear03	465
5 Years	rr_ExpenseExampleNoRedemptionYear05	803
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,562
One Year	rr_AverageAnnualReturnYear01	(13.19%)
Five Years	rr_AverageAnnualReturnYear05	1.65%
Ten Years	rr_AverageAnnualReturnYear10	3.25%
PGIM High Yield Fund | R
Risk Return Abstract	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 the lower of the original purchase price or the net asset value at redemption)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum sales charge (load) imposed on reinvested dividends and other distributions	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption fee	rr_RedemptionFeeOverRedemption	none
Exchange fee	rr_ExchangeFeeOverRedemption	none
Maximum account fee (accounts under $10,000)	rr_MaximumAccountFee	none
Management fee	rr_ManagementFeesOverAssets	0.36%
Distribution or distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Shareholder service fee	rr_Component1OtherExpensesOverAssets	none
Remainder of other expenses	rr_Component2OtherExpensesOverAssets	0.20%
Other expenses:	rr_OtherExpensesOverAssets	0.20%
Total annual Fund operating expenses	rr_ExpensesOverAssets	1.31%
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.25%)
Total annual Fund operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	1.06%	[2],[3]
1 Year	rr_ExpenseExampleYear01	$ 108
3 Years	rr_ExpenseExampleYear03	391
5 Years	rr_ExpenseExampleYear05	694
10 Years	rr_ExpenseExampleYear10	1,557
1 Year	rr_ExpenseExampleNoRedemptionYear01	108
3 Years	rr_ExpenseExampleNoRedemptionYear03	391
5 Years	rr_ExpenseExampleNoRedemptionYear05	694
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,557
One Year	rr_AverageAnnualReturnYear01	(12.00%)
Five Years	rr_AverageAnnualReturnYear05	2.03%
Ten Years	rr_AverageAnnualReturnYear10	3.70%
PGIM High Yield Fund | Z
Risk Return Abstract	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 the lower of the original purchase price or the net asset value at redemption)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum sales charge (load) imposed on reinvested dividends and other distributions	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption fee	rr_RedemptionFeeOverRedemption	none
Exchange fee	rr_ExchangeFeeOverRedemption	none
Maximum account fee (accounts under $10,000)	rr_MaximumAccountFee	none	[5]
Management fee	rr_ManagementFeesOverAssets	0.36%
Distribution or distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Shareholder service fee	rr_Component1OtherExpensesOverAssets	none
Remainder of other expenses	rr_Component2OtherExpensesOverAssets	0.15%
Other expenses:	rr_OtherExpensesOverAssets	0.15%
Total annual Fund operating expenses	rr_ExpensesOverAssets	0.51%
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total annual Fund operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	0.51%	[2],[3]
1 Year	rr_ExpenseExampleYear01	$ 52
3 Years	rr_ExpenseExampleYear03	164
5 Years	rr_ExpenseExampleYear05	285
10 Years	rr_ExpenseExampleYear10	640
1 Year	rr_ExpenseExampleNoRedemptionYear01	52
3 Years	rr_ExpenseExampleNoRedemptionYear03	164
5 Years	rr_ExpenseExampleNoRedemptionYear05	285
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 640
2013	rr_AnnualReturn2013	7.23%
2014	rr_AnnualReturn2014	2.84%
2015	rr_AnnualReturn2015	(2.59%)
2016	rr_AnnualReturn2016	15.30%
2017	rr_AnnualReturn2017	7.76%
2018	rr_AnnualReturn2018	(1.29%)
2019	rr_AnnualReturn2019	16.08%
2020	rr_AnnualReturn2020	5.59%
2021	rr_AnnualReturn2021	6.34%
2022	rr_AnnualReturn2022	(11.64%)
Year to Date Return, Label	rr_YearToDateReturnLabel	<span style="font-family:Arial Narrow;font-size:8pt;margin-left:0.0pt;">The total return for Class Z shares from January 1, 2023 to</span>
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2023
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	4.95%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;margin-left:0.00pt;">Best Quarter:</span>
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	10.64%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:9.70pt;font-weight:bold;margin-left:0.00pt;">Worst Quarter:</span>
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(14.17%)
One Year	rr_AverageAnnualReturnYear01	(11.64%)
Five Years	rr_AverageAnnualReturnYear05	2.60%
Ten Years	rr_AverageAnnualReturnYear10	4.26%
PGIM High Yield Fund | R2
Risk Return Abstract	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 the lower of the original purchase price or the net asset value at redemption)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum sales charge (load) imposed on reinvested dividends and other distributions	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption fee	rr_RedemptionFeeOverRedemption	none
Exchange fee	rr_ExchangeFeeOverRedemption	none
Maximum account fee (accounts under $10,000)	rr_MaximumAccountFee	none
Management fee	rr_ManagementFeesOverAssets	0.36%
Distribution or distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Shareholder service fee	rr_Component1OtherExpensesOverAssets	0.10%	[6]
Remainder of other expenses	rr_Component2OtherExpensesOverAssets	0.21%
Other expenses:	rr_OtherExpensesOverAssets	0.31%
Total annual Fund operating expenses	rr_ExpensesOverAssets	0.92%
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.01%)
Total annual Fund operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	0.91%	[2],[3]
1 Year	rr_ExpenseExampleYear01	$ 93
3 Years	rr_ExpenseExampleYear03	292
5 Years	rr_ExpenseExampleYear05	508
10 Years	rr_ExpenseExampleYear10	1,130
1 Year	rr_ExpenseExampleNoRedemptionYear01	93
3 Years	rr_ExpenseExampleNoRedemptionYear03	292
5 Years	rr_ExpenseExampleNoRedemptionYear05	508
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,130
One Year	rr_AverageAnnualReturnYear01	(11.83%)
Five Years	rr_AverageAnnualReturnYear05	2.24%
Ten Years	rr_AverageAnnualReturnYear10
SinceInception	rr_AverageAnnualReturnSinceInception	2.25%
InceptionDate	rr_AverageAnnualReturnInceptionDate	Dec. 27, 2017
PGIM High Yield Fund | R4
Risk Return Abstract	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 the lower of the original purchase price or the net asset value at redemption)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum sales charge (load) imposed on reinvested dividends and other distributions	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption fee	rr_RedemptionFeeOverRedemption	none
Exchange fee	rr_ExchangeFeeOverRedemption	none
Maximum account fee (accounts under $10,000)	rr_MaximumAccountFee	none
Management fee	rr_ManagementFeesOverAssets	0.36%
Distribution or distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Shareholder service fee	rr_Component1OtherExpensesOverAssets	0.10%	[6]
Remainder of other expenses	rr_Component2OtherExpensesOverAssets	0.21%
Other expenses:	rr_OtherExpensesOverAssets	0.31%
Total annual Fund operating expenses	rr_ExpensesOverAssets	0.67%
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.01%)
Total annual Fund operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	0.66%	[2],[3]
1 Year	rr_ExpenseExampleYear01	$ 67
3 Years	rr_ExpenseExampleYear03	213
5 Years	rr_ExpenseExampleYear05	372
10 Years	rr_ExpenseExampleYear10	834
1 Year	rr_ExpenseExampleNoRedemptionYear01	67
3 Years	rr_ExpenseExampleNoRedemptionYear03	213
5 Years	rr_ExpenseExampleNoRedemptionYear05	372
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 834
One Year	rr_AverageAnnualReturnYear01	(11.61%)
Five Years	rr_AverageAnnualReturnYear05	2.50%
Ten Years	rr_AverageAnnualReturnYear10
SinceInception	rr_AverageAnnualReturnSinceInception	2.51%
InceptionDate	rr_AverageAnnualReturnInceptionDate	Dec. 27, 2017
PGIM High Yield Fund | R6
Risk Return Abstract	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 the lower of the original purchase price or the net asset value at redemption)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum sales charge (load) imposed on reinvested dividends and other distributions	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption fee	rr_RedemptionFeeOverRedemption	none
Exchange fee	rr_ExchangeFeeOverRedemption	none
Maximum account fee (accounts under $10,000)	rr_MaximumAccountFee	none
Management fee	rr_ManagementFeesOverAssets	0.36%
Distribution or distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Shareholder service fee	rr_Component1OtherExpensesOverAssets	none
Remainder of other expenses	rr_Component2OtherExpensesOverAssets	0.02%
Other expenses:	rr_OtherExpensesOverAssets	0.02%
Total annual Fund operating expenses	rr_ExpensesOverAssets	0.38%
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total annual Fund operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	0.38%	[2],[3]
1 Year	rr_ExpenseExampleYear01	$ 39
3 Years	rr_ExpenseExampleYear03	122
5 Years	rr_ExpenseExampleYear05	213
10 Years	rr_ExpenseExampleYear10	480
1 Year	rr_ExpenseExampleNoRedemptionYear01	39
3 Years	rr_ExpenseExampleNoRedemptionYear03	122
5 Years	rr_ExpenseExampleNoRedemptionYear05	213
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 480
One Year	rr_AverageAnnualReturnYear01	(11.55%)
Five Years	rr_AverageAnnualReturnYear05	2.72%
Ten Years	rr_AverageAnnualReturnYear10	4.34%
InceptionDate	rr_AverageAnnualReturnInceptionDate
PGIM High Yield Fund | Return After Taxes on Distributions | Z
Risk Return Abstract	rr_RiskReturnAbstract
One Year	rr_AverageAnnualReturnYear01	(13.98%)
Five Years	rr_AverageAnnualReturnYear05	(0.07%)
Ten Years	rr_AverageAnnualReturnYear10	1.47%
PGIM High Yield Fund | Return After Taxes on Distributions and Sale of Fund Shares | Z
Risk Return Abstract	rr_RiskReturnAbstract
One Year	rr_AverageAnnualReturnYear01	(6.86%)
Five Years	rr_AverageAnnualReturnYear05	0.90%
Ten Years	rr_AverageAnnualReturnYear10	2.03%
PGIM High Yield Fund | Bloomberg US Corporate High Yield 1% Issuer Capped Index
Risk Return Abstract	rr_RiskReturnAbstract
One Year	rr_AverageAnnualReturnYear01	(11.11%)
Five Years	rr_AverageAnnualReturnYear05	2.17%
Ten Years	rr_AverageAnnualReturnYear10	3.96%
SinceInception	rr_AverageAnnualReturnSinceInception	2.17%	[7]

[1] Investors who purchase $500,000 or more of Class A shares and sell these shares within 12 months of purchase are subject to a contingent deferred sales charge (“CDSC”) of 1.00%, although they are not subject to an initial sales charge. The CDSC is waived for certain retirement and/or benefit plans.

[2] PGIM Investments LLC (“PGIM Investments”) has contractually agreed, through December 31, 2024, to limit transfer agency, shareholder servicing, sub-transfer agency, and blue sky fees, as applicable, to the extent that such fees cause the Total Annual Fund Operating Expenses to exceed 0.91% of average daily net assets for Class R2 shares or 0.66% of average daily net assets for Class R4 shares. This contractual expense limitation excludes interest, brokerage, taxes (such as income and foreign withholding taxes, stamp duty and deferred tax expenses), acquired fund fees and expenses, extraordinary expenses, and certain other Fund expenses such as dividend and interest expense and broker charges on short sales. Where applicable, PGIM Investments agrees to waive management fees or shared operating expenses on any share class to the same extent that it waives such expenses on any other share class. In addition, Total Annual Fund Operating Expenses for Class R6 shares will not exceed Total Annual Fund Operating Expenses for Class Z shares. Fees and/or expenses waived and/or reimbursed by PGIM Investments for the purpose of preventing the expenses from exceeding a certain expense ratio limit may be recouped by PGIM Investments within the same fiscal year during which such waiver and/or reimbursement is made if such recoupment can be realized without exceeding the expense limit in effect at the time of the recoupment for that fiscal year. This expense limitation may not be terminated prior to December 31, 2024 without the prior approval of the Fund’s Board of Directors.

[3] The distributor of the Fund has contractually agreed through December 31, 2024 to reduce its distribution and service (12b-1) fees for Class R shares to 0.50% of the average daily net assets of the Class R shares. This waiver may not be terminated prior to December 31, 2024 without the prior approval of the Fund’s Board of Directors.

[4] Class C shares are sold with a CDSC of 1.00% on sales made within 12 months of purchase.

[5] Direct Transfer Agent Accounts holding under $10,000 of Class Z shares are subject to the $15 fee.

[6] “Shareholder service fee” reflects maximum allowable fees under a shareholder services plan.

[7] Since Inception returns for the Index are measured from the month-end closest to the inception date for Class R2 shares and Class R4 shares.