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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Dec. 31, 2017
Registrant Name dei_EntityRegistrantName PUTNAM FUNDS TRUST
Central Index Key dei_EntityCentralIndexKey 0001005942
Amendment Flag dei_AmendmentFlag false
Trading Symbol dei_TradingSymbol PFT
Document Creation Date dei_DocumentCreationDate Apr. 20, 2018
Document Effective Date dei_DocumentEffectiveDate Apr. 20, 2018
Prospectus Date rr_ProspectusDate Dec. 30, 2017