3.26.1 html 341 60 1 true 43 0 false 2 false false R1.htm 010000 - Disclosure - Form N-1A Cover Sheet http://xbrl.sec.gov/rr/role/N1aCover Form N-1A Cover Risk/Return 1 false false R2.htm 010000 - Document - Document and Entity Information {Elements} Sheet http://www.dreyfus.com/20260131/role/DocumentAndEntityInformation1 Document and Entity Information Risk/Return 2 false false R3.htm 010002 - Disclosure - Investment Objectives and Goals Sheet http://xbrl.sec.gov/rr/role/RiskReturn Investment Objectives and Goals Risk/Return 3 false true R4.htm 010003 - Disclosure - Fees and Expenses Sheet http://xbrl.sec.gov/rr/role/FeesAndExpenses Fees and Expenses Risk/Return 4 false false R5.htm 010004 - Disclosure - Investment Strategy Sheet http://xbrl.sec.gov/rr/role/InvestmentStrategy Investment Strategy Risk/Return 5 false true R6.htm 010004 - Schedule - Investment Risks {Unlabeled} Sheet http://www.dreyfus.com/20260131/role/RRCustomRiskRole32 Investment Risks Risk/Return 6 false true R7.htm 010006 - Disclosure - Performance Management Sheet http://xbrl.sec.gov/rr/role/PerformanceManagement Performance Management Risk/Return 7 false false R10.htm 020050 - Disclosure - Annual Total Returns Sheet http://xbrl.sec.gov/rr/role/BarChartData Annual Total Returns Risk/Return 8 false false R27.htm 020102 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData2 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 9 false false R28.htm 020104 - Disclosure - Risk/Return Detail Data (Dreyfus Government Securities Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData4 Risk/Return Detail Data (Dreyfus Government Securities Cash Management) Risk/Return 10 false false R29.htm 020106 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData6 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 11 false false R30.htm 020108 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData8 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 12 false false R31.htm 020110 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData10 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 13 false false R32.htm 020112 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData12 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 14 false false R33.htm 020114 - Disclosure - Risk/Return Detail Data (Dreyfus Government Securities Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData14 Risk/Return Detail Data (Dreyfus Government Securities Cash Management) Risk/Return 15 false false R34.htm 020116 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData16 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 16 false false R35.htm 020118 - Disclosure - Risk/Return Detail Data (Dreyfus Government Securities Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData18 Risk/Return Detail Data (Dreyfus Government Securities Cash Management) Risk/Return 17 false false R36.htm 020120 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData20 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 18 false false R37.htm 020122 - Disclosure - Risk/Return Detail Data (Dreyfus Government Securities Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData22 Risk/Return Detail Data (Dreyfus Government Securities Cash Management) Risk/Return 19 false false R38.htm 020124 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData24 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 20 false false R39.htm 020126 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData26 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 21 false false R40.htm 020128 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData28 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 22 false false R41.htm 020130 - Disclosure - Risk/Return Detail Data (Dreyfus Government Cash Management) {Elements} Sheet http://www.dreyfus.com/20260131/role/RRDetailData30 Risk/Return Detail Data (Dreyfus Government Cash Management) Risk/Return 23 false false All Reports Book All Reports c485bpos-20260529.xsd c485bpos-20260529_def.xml c485bpos-20260529_lab.xml c485bpos-20260529_pre.xml c485bpos.htm img_097c2a764e994f2.jpg img_0d6662fea4234f3.jpg img_1191725200f54f9.jpg img_18db6bbdc9084f6.jpg img_1f48caa40b414f2.jpg img_3219799a7f5b4f5.jpg img_3e840c0dc3084f6.jpg img_590e6841f0bc4f11.jpg img_5f06893ff57e4f5.jpg img_647c5eeb43d14f9.jpg img_69105fd2ad8e4f9.jpg img_6cca95d33add4f5.jpg img_75815b3c6d044f6.jpg img_7a08aa89587f4f2.jpg img_7fc49b1dfc7b4f7.jpg img_84a1d0dec97d4f12.jpg img_91783a2fb09f4f7.jpg img_a2076750a0804f2.jpg img_a907a202e5a84f2.jpg img_b2fecb3fd5c54f12.jpg img_b5c0f230f60d4f8.jpg img_b8b69224fcf44f10.jpg img_bf4e89fce2664f8.jpg img_c7cc06c598564f8.jpg img_c8f4f2ce71d94f4.jpg img_d21473b118124f7.jpg img_ec0a2a9235094f8.jpg img_f5e8299325e14f7.jpg http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/oef/2025 true false