v3.26.1
Basis of presentation, summary of significant accounting policies and recent accounting pronouncements - Narrative (Details)
12 Months Ended
Jun. 30, 2026
USD ($)
Unit
supplier
segment
operator
Jun. 30, 2025
USD ($)
Unit
supplier
operator
Jun. 30, 2024
USD ($)
operator
Jun. 13, 2025
Dec. 06, 2024
Defined Benefit Plan Disclosure [Line Items]          
Cash and cash equivalents $ 5,895,591,000 $ 564,526,000      
Restricted cash 1,723,900,000        
Cash provided by (used in) operating activity 2,100,418,000 245,886,000 $ 52,219,000    
Capital expenditure commitments $ 13,810,037,000 $ 368,805,000      
Number of reportable segments | segment 2        
Bitcoin held on hand (in units) | Unit 0 0      
Lease income $ 0 $ 0 $ 0    
Suppliers of mining hardware | supplier 1 1      
Suppliers of HPC hardware | supplier 4 4      
Mining pool operators | operator 3 3 3    
Crypto asset, fair value $ 0        
Penalties accrued related to income taxes $ 0 $ 0 $ 0    
2030 Convertible Notes | Convertible debt          
Defined Benefit Plan Disclosure [Line Items]          
Stated interest rate 3.25%       3.25%
2029 Convertible Notes | Convertible debt          
Defined Benefit Plan Disclosure [Line Items]          
Stated interest rate 3.50%     3.50%  
Revenue | Customer concentration risk | Bitcoin Mining          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of revenue, percentage 100.00% 97.00% 98.00%    
Minimum          
Defined Benefit Plan Disclosure [Line Items]          
Requisite service period 7 years        
Maximum          
Defined Benefit Plan Disclosure [Line Items]          
Requisite service period 10 years