0001717375 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:PrincipalRisks2Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member oef:RiskLoseMoneyMember 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member oef:RiskMoneyMarketFundPriceFluctuatesMember 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member oef:RiskMoneyMarketFundMayNotPreserveDollarMember 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member oef:RiskNotInsuredMember 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:Interestraterisk2Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:Liquidityrisk2Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:Marketrisk2Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:USTreasurysecuritiesrisk2Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:Repurchaseagreementcounterpartyrisk2Member 2025-11-30 2025-11-30 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2018-12-31 2018-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2019-12-31 2019-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2020-12-31 2020-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2021-12-31 2021-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2022-12-31 2022-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2023-12-31 2023-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2024-12-31 2024-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2025-12-31 2025-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2025-01-01 2025-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2021-01-01 2025-12-31 0001717375 cik0001717375:S000059809Member cik0001717375:C000195671Member 2017-12-18 2025-12-31 iso4217:USD pure N-1A Dreyfus Institutional Liquidity Funds 2026-03-31 2026-03-31 Fund Summary Investment Objective The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity. Fees and Expenses 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 examples below. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0008 0.0001 0.0009 Example The 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 and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 9 29 51 115 Principal Investment Strategy The fund pursues its investment objective by investing only in U.S. Treasury securities, repurchase agreements collateralized solely by U.S. Treasury securities or securities issued by U.S. government agencies that are backed by the full faith and credit of the U.S. government, and cash. The fund is a money market fund subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, and seeks to maintain a stable share price of $1.00.The fund is a "government money market fund," as that term is defined in Rule 2a-7, and as such is required to invest at least 99.5% of its total assets in securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities, repurchase agreements collateralized solely by cash and/or government securities, and cash. The fund invests in U.S. Treasury securities and seeks to enter into repurchase agreements that present minimal credit risk, based on an assessment by Dreyfus, a division of Mellon Investments Corporation, the fund's sub-adviser, of the counterparty's credit quality and capacity to meet its financial obligations, among other factors. <div style="border-bottom:0.25pt; border-bottom-style:solid; border-bottom-color:#000000; margin-top:12pt; padding:0pt 0pt 1pt 0pt;"><div style="font-size:12.0pt; font-family:Arial; text-align:left; color:#000000; font-weight:bold;">Principal Risks</div></div>An investment in the fund is not a bank account or a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund's yield will fluctuate as the short-term securities in its portfolio mature or are sold and the proceeds are reinvested in securities with different interest rates. BNY Mellon Investment Adviser, Inc. and its affiliates are not required to reimburse the fund for losses, and you should not expect that BNY Mellon Investment Adviser, Inc. or its affiliates will provide financial support to the fund at any time, including during periods of market stress. The fund is subject to the following principal risks: An investment in the fund is not a bank account or a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund's yield will fluctuate as the short-term securities in its portfolio mature or are sold and the proceeds are reinvested in securities with different interest rates. · Interest rate risk: This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could impair the fund's ability to maintain a stable net asset value. A wide variety of market factors can cause interest rates to rise, including central bank monetary policy, rising inflation and changes in general economic conditions. It is difficult to predict the pace at which central banks or monetary authorities may increase (or decrease) interest rates or the timing, frequency, or magnitude of such changes. Changing interest rates may have unpredictable effects on markets, may result in heightened market volatility and may detract from fund performance. · Liquidity risk: When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities in a timely manner at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially impairing the fund's ability to maintain a stable net asset value. · Market risk: The value of the securities in which the fund invests may be affected by political, regulatory, economic and social developments. In addition, turbulence in financial markets and reduced liquidity in fixed-income markets may negatively affect many issuers, which could adversely affect the fund. 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. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies world-wide. Local, regional or global events such as war, acts of terrorism, natural disasters, the spread of infectious illness or other public health issues, recessions, elevated levels of government debt, changes in trade regulation or economic sanctions, internal unrest and discord, or other events could have a significant impact on the fund and its investments. · U.S. Treasury securities risk: A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate. · Repurchase agreement counterparty risk: The fund is subject to the risk that a counterparty in a repurchase agreement could fail to honor the terms of the agreement. If this occurs, the fund may suffer a loss if the proceeds from the sale of the underlying securities are less than the repurchase price. Performance The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's shares from year to year. The table shows the average annual total returns of the fund's shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com. The following bar chart and table provide some indication of the risks of investing in the fund. The fund's past performance is not necessarily an indication of how the fund will perform in the future. www.dreyfus.com Year-by-Year Total Returns as of 12/31 each year (%) During the periods shown in the chart: Best Quarter 2023, Q4: 1.34 Worst Quarter 2021, Q4: 0.00 Best Quarter 2023-12-31 0.0134 Worst Quarter 2021-12-31 0.0000 Average Annual Total Returns (as of 12/31/25) 2017-12-18 0.0427 0.0324 0.0254 Institutions may call toll-free 1-800-373-9387 (inside the U.S. only) for the current yield of the fund's shares. 1-800-373-9387 485BPOS 2025-11-30 0001717375 false 2026-03-27 ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData row dei_DocumentInformationDocumentAxis compact cik0001717375_S000059809Summary1Member row dei_LegalEntityAxis compact cik0001717375_S000059809Member ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExample row dei_DocumentInformationDocumentAxis compact cik0001717375_S000059809Summary1Member row dei_LegalEntityAxis compact cik0001717375_S000059809Member ~ ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * row dei_DocumentInformationDocumentAxis compact cik0001717375_S000059809Summary1Member row dei_LegalEntityAxis compact cik0001717375_S000059809Member row oef_ClassAxis compact * row oef_PerformanceMeasureAxis compact * ~ 0.0177 0.0215 0.0033 0.0001 0.0164 0.0511 0.0525 0.0426999998092651 ~ http://www.dreyfus.com/20251130/role/RRRiskTable3 ~