v3.26.1
Restructuring Charges and Asset Write-Offs - Changes in Restructuring Liabilities (Details) - USD ($)
$ in Thousands
 6 Months Ended 21 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Balance Sheet Location [Axis]: us-gaap:AccruedLiabilitiesCurrent    
Restructuring Reserve [Roll Forward]    
Ending balance $ 15,700  
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Restructuring Reserve [Roll Forward]    
Ending balance 10,200  
Kemerton Train 1 Restructuring    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges $ 32,207  
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring charges and asset write-offs  
Cash payments $ (18,692)  
Asset write-off (2,326)  
Foreign currency translation adjustments and other (193)  
Ending balance 10,590  
Kemerton Train 1 Restructuring | Decommissioning Costs    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges 11,819  
Cash payments (11,819)  
Asset write-off 0  
Foreign currency translation adjustments and other 0  
Ending balance 0  
Kemerton Train 1 Restructuring | Asset Write-offs    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges 2,732  
Cash payments 0  
Asset write-off (2,326)  
Foreign currency translation adjustments and other 0  
Ending balance 0  
Kemerton Train 1 Restructuring | Severance and Employee Benefits    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges 15,397  
Cash payments (6,400)  
Asset write-off 0  
Foreign currency translation adjustments and other (193)  
Ending balance 8,804  
Kemerton Train 1 Restructuring | Contract Cancellation Costs    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges 1,013  
Cash payments (266)  
Asset write-off 0  
Foreign currency translation adjustments and other 0  
Ending balance 747  
Kemerton Train 1 Restructuring | Other    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges 1,246  
Cash payments (207)  
Asset write-off 0  
Foreign currency translation adjustments and other 0  
Ending balance 1,039  
Second Half 2024 Restructuring    
Restructuring Reserve [Roll Forward]    
Beginning balance 22,116  
Charges $ 1,402  
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring charges and asset write-offs  
Cash payments $ (7,420)  
Foreign currency translation adjustments and other (724)  
Ending balance 15,374  
Second Half 2024 Restructuring | Decommissioning Costs    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges 1,402 $ 13,200
Cash payments (1,402)  
Foreign currency translation adjustments and other 0  
Ending balance 0  
Second Half 2024 Restructuring | Asset Write-offs    
Restructuring Reserve [Roll Forward]    
Beginning balance 0  
Charges 0 726,000
Cash payments 0  
Foreign currency translation adjustments and other 0  
Ending balance 0  
Second Half 2024 Restructuring | Severance and Employee Benefits    
Restructuring Reserve [Roll Forward]    
Beginning balance 1,115  
Charges 0 53,400
Cash payments (837)  
Foreign currency translation adjustments and other (278)  
Ending balance 0  
Second Half 2024 Restructuring | Contract Cancellation Costs    
Restructuring Reserve [Roll Forward]    
Beginning balance 16,158  
Charges 0 38,400
Cash payments (5,181)  
Foreign currency translation adjustments and other (446)  
Ending balance 10,531  
Second Half 2024 Restructuring | Other    
Restructuring Reserve [Roll Forward]    
Beginning balance 4,843  
Charges 0 $ 29,300
Cash payments 0  
Foreign currency translation adjustments and other 0  
Ending balance $ 4,843