S 000000071 Summary1 [Member] Prospectus Summary Prospectus Summary S 000000071 [Member] BNY Mellon Research Growth Fund, Inc. BNY Mellon Research Growth Fund, Inc. C 000069523 [Member] A A C 000069524 [Member] C C C 000069525 [Member] I I C 000127666 [Member] Y Y C 000000108 [Member] Z Z cik0000030162_PrincipalRisks2Member [Member] Principal Risks Principal Risks cik0000030162_Risksofstockinvesting2Member [Member] · Risks of stock investing · Risks of stock investing cik0000030162_Marketrisk2Member [Member] · Market risk · Market risk cik0000030162_Growthstockrisk2Member [Member] · Growth stock risk · Growth stock risk cik0000030162_Foreigninvestmentrisk2Member [Member] · Foreign investment risk · Foreign investment risk cik0000030162_Managementrisk2Member [Member] · Management risk · Management risk cik0000030162_Russell1000Indexreflectsnodeductionsforfeesexpensesortaxes31Member [Member] Russell 1000® Index reflects no deductions for fees, expenses or taxes Russell 1000® Index reflects no deductions for fees, expenses or taxes cik0000030162_Russell1000GrowthIndexreflectsnodeductionsforfeesexpensesortaxes32Member [Member] Russell 1000® Growth Index reflects no deductions for fees, expenses or taxes Russell 1000® Growth Index reflects no deductions for fees, expenses or taxes Document [Axis] Series [Axis] Prospectus Prospectus [Table] Risk/Return: Performance Measure [Axis] Class [Axis] Before Taxes After Taxes on Distributions After Taxes on Distributions and Sales Risk [Axis] All Risks [Member] Risk Lose Money [Member] Risk Not Insured [Member] Risk Nondiversified Status [Member] Risk Not Insured Depository Institution [Member] Risk Money Market Fund Price Fluctuates [Member] Risk Money Market Fund May Impose Fees or Suspend Sales [Member] Risk Money Market Fund Sponsor May Not Provide Support [Member] Risk Money Market Fund May Not Preserve Dollar [Member] Risks [Table Text Block] Risks [Table Text Block]