v3.26.1
Label Element Value
Risk/Return: oef_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Nov. 30, 2025
Registrant Name dei_EntityRegistrantName NEW YORK LIFE INVESTMENTS FUNDS TRUST
Entity Central Index Key dei_EntityCentralIndexKey 0001469192
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Mar. 27, 2026
Document Effective Date dei_DocumentEffectiveDate Mar. 30, 2026
Entity Investment Company Type dei_EntityInvCompanyType N-1A
Prospectus Date oef_ProspectusDate Mar. 30, 2026
Prospectus Summary | NYLI Cushing MLP Premier Fund | Class A  
Risk/Return: oef_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol CSHAX
Prospectus Summary | NYLI Cushing MLP Premier Fund | Investor Class  
Risk/Return: oef_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol CSHNX
Prospectus Summary | NYLI Cushing MLP Premier Fund | Class C  
Risk/Return: oef_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol CSHCX
Prospectus Summary | NYLI Cushing MLP Premier Fund | Class I  
Risk/Return: oef_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol CSHZX