v3.26.3
Investment Objectives and Goals - BNY Mellon California AMT-Free Municipal Bond Fund, Inc.
May 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] Fund Summary
Objective [Heading] Investment Objective
Objective, Primary [Text Block] The fund seeks as high a level of current income, exempt from federal and California state income taxes, as is consistent with the preservation of capital.