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Sale of Hawesville - Narrative (Details)
$ in Millions
3 Months Ended
Feb. 02, 2026
USD ($)
MW
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Recognized gain   $ 287.9 $ 0.0
Discontinued Operations, Disposed of by Sale | Hawesville Facility      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Proceeds from sale of hawesville facility $ 200.0    
Minority interest purchase right $ 300.0    
Data center operations output triggering level | MW 375    
Recognized gain $ 287.9    
Debt covenant, restricted cash   $ 88.1  
Discontinued Operations, Disposed of by Sale | Hawesville Facility | Terawulf Affiliate      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Non-dilutive minority equity interest, percent 6.80%