v3.25.1
Label Element Value
Risk Return Abstract rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Period End Date dei_DocumentPeriodEndDate Nov. 30, 2024
Registrant Name dei_EntityRegistrantName PIONEER SERIES TRUST II
CIK dei_EntityCentralIndexKey 0001265389
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Mar. 25, 2025
Document Effective Date dei_DocumentEffectiveDate Mar. 28, 2025
Prospectus Date rr_ProspectusDate Mar. 28, 2025
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Pioneer Select Mid Cap Growth Fund | A  
Risk Return Abstract rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PGOFX
Pioneer Select Mid Cap Growth Fund | C  
Risk Return Abstract rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol GOFCX
Pioneer Select Mid Cap Growth Fund | K  
Risk Return Abstract rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PSMKX
Pioneer Select Mid Cap Growth Fund | R  
Risk Return Abstract rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PGRRX
Pioneer Select Mid Cap Growth Fund | Y  
Risk Return Abstract rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol GROYX