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Research Collaboration and License Agreements (Tables)
 12 Months Ended
Dec. 31, 2022
Research Collaboration And License Agreements [Abstract]  
Summary of contract balances
Changes in the Company's contract balances were as follows:
December 31,
(dollars in millions)20222021
Accounts receivable
Beginning balance$15.0 $1.0 
Additions6.4 19.9 
Payments received(20.4)(5.9)
Ending balance$1.0 $15.0 
Accounts payable related to collaborations
Beginning balance$— $— 
Additions5.0 — 
Payments made— — 
Ending balance$5.0 $— 
Contract assets: Collaboration contract asset
Beginning balance$12.5 $— 
Additions— 12.9 
Amortization(1.8)(0.4)
Ending balance$10.7 $12.5 
Contract liabilities: Deferred revenue
Beginning balance$740.5 $45.1 
Additions to collaboration agreements4.0 742.1 
Revenue recognized from balances held at the beginning of the period(120.0)(18.6)
Revenue recognized from balances not held at the beginning of the period(0.8)(28.1)
Ending balance$623.7 $740.5 
Transaction price allocated to performance obligations
The aggregate amount of the transaction price allocated to performance obligations that were unsatisfied as of December 31, 2022 totaled $623.7 million, which is expected to be recognized in the following periods:
(dollars in millions)
2023$218.6 
2024193.9 
202590.2 
202655.3 
202734.7 
Thereafter31.0 
Total$623.7