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Document and Entity Information
Total
Prospectus:  
Document Type 485BPOS
Document Period End Date May 31, 2019
Registrant Name BNY Mellon International Securities Funds, Inc.
Entity Central Index Key 0000897469
Entity Inv Company Type N-1A
Amendment Flag false
Document Creation Date Sep. 25, 2019
Document Effective Date Sep. 30, 2019
Prospectus Date Sep. 30, 2019
BNY Mellon Emerging Markets Securities Fund | Class Y  
Prospectus:  
Trading Symbol DYPEX
BNY Mellon Emerging Markets Securities Fund | Class I  
Prospectus:  
Trading Symbol DRPEX
BNY Mellon Emerging Markets Securities Fund | Class C  
Prospectus:  
Trading Symbol DCPEX
BNY Mellon Emerging Markets Securities Fund | Class A  
Prospectus:  
Trading Symbol DRFMX