v3.26.3
Research Collaboration and License Agreements - Schedule of Contract Balances (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Accounts receivable related to collaborations        
Beginning balance $ 1.0 $ 5.7    
Additions 53.0 20.4    
Payments received (52.2) (5.8)    
Ending balance 1.8 20.3    
Accounts payable related to collaborations        
Beginning balance 16.8 5.4    
Additions 15.6 39.3    
Payments made (30.1) (34.9)    
Ending balance 2.3 9.8    
Contract assets: Collaboration contract asset        
Beginning balance 0.0 3.7 $ 3.5 $ 7.8
Amortization (3.5) (4.1)    
Ending balance 0.0 3.7    
Contract assets: Contract assets        
Beginning balance 0.0 0.0    
Additions 27.5 0.0    
Deductions (4.9) 0.0    
Ending balance 22.6 0.0    
Contract liabilities: Deferred revenue        
Beginning balance 205.6 448.2    
Revenue recognized from balances held at the beginning of the period (152.9) (233.1)    
Deductions from collaboration agreements (52.7) 0.0    
Ending balance 0.0 215.1    
Contract liabilities: Collaboration liability        
Beginning balance 0.0 0.0    
Additions 52.7 0.0    
Deductions (6.3) 0.0    
Ending balance $ 46.4 $ 0.0