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Submission
Aug. 27, 2025
Submission [Line Items]  
Central Index Key 0000901243
Registrant Name BLACKROCK MUNIASSETS FUND, INC.
Registration File Number 333-288712
Form Type N-14
Submission Type N-14 8C/A
Fee Exhibit Type EX-FILING FEES
Offering Table N/A
Offset Table N/A N/A
Combined Prospectus Table N/A N/A