Label	Element	Value
Dreyfus Government Cash Management
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	March 15, 2024 DREYFUS GOVERNMENT CASH MANAGEMENT FUNDS -Dreyfus Government Cash Management Supplement to Summary Prospectus and Prospectus BOLD^{^®} Shares
Risk/Return [Heading]	rr_RiskReturnHeading	Dreyfus Government Cash Management
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following information supersedes and replaces any contrary information contained in the sections "Performance" in the fund's summary prospectus and "Fund Summary – Performance" in the fund's prospectus: For the current yield for BOLD^{^®} shares, call toll-free 1-800-346-3621. Clients of institutions should call the institution directly.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-800-346-3621

If applicable, include a statement explaining that updated performance information is available and providing a Web site address and/or toll-free (or collect) telephone number where the updated information may be obtained.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph i

+ Details

Name:	rr_PerformanceAvailabilityPhone
Namespace Prefix:	rr_
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Period Type:	duration

- Definition

Risk/Return Bar Chart and Table.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2

+ Details

Name:	rr_PerformanceNarrativeTextBlock
Namespace Prefix:	rr_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	rr_RiskReturnAbstract
Namespace Prefix:	rr_
Data Type:	xbrli:stringItemType
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- Definition

Risk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicated

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 2

+ Details

Name:	rr_RiskReturnHeading
Namespace Prefix:	rr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element contains the text of a prospectus supplement (submission type 497) not already contained in an element containing amended text or other data from a previous submission.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A

+ Details

Name:	rr_SupplementToProspectusTextBlock
Namespace Prefix:	rr_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

- Details

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