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Research Collaboration and License Agreements (Tables)
 6 Months Ended
Jun. 30, 2025
Research Collaboration And License Agreements [Abstract]  
Schedule of Contract Balances
Changes in the Company's contract balances for the six months ended June 30, 2025 and 2024 were as follows:
(dollars in millions)June 30,
2025		June 30,
2024
Accounts receivable related to collaborations
Beginning balance$5.7 $— 
Additions0.1 1.8 
Payments received(5.3)— 
Ending balance$0.5 $1.8 
Accounts payable related to collaborations
Beginning balance$5.4 $13.1 
Additions29.5 29.2 
Payments made(24.8)(26.1)
Ending balance$10.1 $16.2 
Contract assets: Collaboration contract asset
Beginning balance$7.8 $9.4 
Additions— 3.0 
Amortization(3.7)(1.7)
Ending balance$4.1 $10.7 
Contract liabilities: Deferred revenue
Beginning balance$448.2 $549.2 
Additions to collaboration agreements— 130.0 
Revenue recognized from balances held at the beginning of the period(211.2)(56.3)
Revenue recognized from new collaborations— (23.7)
Ending balance$237.0 $599.2 
Schedule of Transaction Price Allocated to Performance Obligations
The aggregate amount of the transaction price allocated to performance obligations that were unsatisfied as of June 30, 2025 totaled $237.0 million, which is expected to be recognized in the following periods:
(dollars in millions)
Remainder of 2025$69.6 
202666.6 
202720.3 
202880.5 
Total$237.0