v3.25.1

Investment Objectives and Goals	Jun. 11, 2025
BNY Mellon Small Cap Multi-Strategy Fund
Prospectus [Line Items]
Risk/Return [Heading]	BNY Mellon Small Cap Multi-Strategy Fund

X

- References

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

+ Details

Name:	oef_ProspectusLineItems
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

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

+ Details

Name:	oef_RiskReturnHeading
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=ck0001111565_S000000371Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: