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Commitments and Contingencies - Narrative (Details)
 3 Months Ended 6 Months Ended 54 Months Ended
Jan. 08, 2025
lawsuit
Dec. 29, 2024
USD ($)
Jun. 28, 2020
endowedFacultyChair
Dec. 29, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 29, 2024
USD ($)
Jun. 30, 2024
USD ($)
Jun. 25, 2023
USD ($)
Loss Contingencies [Line Items]                
Potential total grant amount of GDA   $ 500,000,000   $ 500,000,000   $ 500,000,000    
GDA term     13 years          
Duration of annual commitment fee payment of GDA     6 years          
Number of endowed faculty chairs created | endowedFacultyChair     2          
Reduction in property, plant, and equipment           500,000,000.0    
Reimbursement of property and equipment purchases from long-term incentive agreement       42,000,000.0 $ 79,400,000 467,200,000    
Reimbursement of property and equipment purchases from long-term incentive agreement, receivables           32,800,000    
Subsequent Event                
Loss Contingencies [Line Items]                
Loss contingency, number of additional lawsuits | lawsuit 2              
Purchase Commitment 2023                
Loss Contingencies [Line Items]                
Purchase commitment, amount committed               $ 200,000,000.0
Current purchases under agreement   5,800,000   12,500,000        
Product purchases year three   36,000,000.0   36,000,000.0   36,000,000.0    
Product purchases year four   50,100,000   50,100,000   50,100,000    
Product purchases year five   73,700,000   73,700,000   73,700,000    
Capacity reserve deposit   60,000,000.0   60,000,000.0   60,000,000.0    
Prepaid supplies   48,900,000   48,900,000   48,900,000    
Purchase Commitment 2024                
Loss Contingencies [Line Items]                
Purchase commitment, amount committed             $ 86,400,000  
Current purchases under agreement   7,200,000   14,400,000        
Product purchases year two   28,800,000   28,800,000   28,800,000    
Product purchases year three   9,600,000   9,600,000   9,600,000    
Product purchases year one   $ 14,400,000   14,400,000   $ 14,400,000    
Minimum                
Loss Contingencies [Line Items]                
Annual cost of GDA       2,200,000        
Maximum                
Loss Contingencies [Line Items]                
Annual cost of GDA       $ 5,200,000