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Reverse Recapitalization - Schedule of Old Shares Exchanged of Common Stock (Details) - shares
 12 Months Ended
Dec. 14, 2023
Sep. 30, 2024
Sep. 30, 2022
Old Nukk [Member]      
Reverse Recapitalization - Schedule of Old Shares Exchanged of Common Stock (Details) [Line Items]      
Common Stock, Shares, Outstanding     367,175,886
Stock Issued During Period, Shares, Issued for Services 1,641,176    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares   382,675,886  
Brilliant [Member]      
Reverse Recapitalization - Schedule of Old Shares Exchanged of Common Stock (Details) [Line Items]      
Stock Issued During Period, Shares, Issued for Services 13,858,824    
Nukkleus Inc [Member]      
Reverse Recapitalization - Schedule of Old Shares Exchanged of Common Stock (Details) [Line Items]      
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares   1,312,494  
Common Stock [Member] | Old Nukk [Member]      
Reverse Recapitalization - Schedule of Old Shares Exchanged of Common Stock (Details) [Line Items]      
Common Stock, Shares, Outstanding     1,259,333
Stock Issued During Period, Shares, Issued for Services 5,628    
Common Stock [Member] | Brilliant [Member]      
Reverse Recapitalization - Schedule of Old Shares Exchanged of Common Stock (Details) [Line Items]      
Stock Issued During Period, Shares, Issued for Services 47,533