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Research Collaboration and License Agreements - Summary of Contract Balances (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Accounts receivable related to collaborations |  |
Beginning balance | $ 5.7 | $ 0.0
Additions | 0.1 | 1.8
Payments received | (5.3) | 0.0
Ending balance | 0.5 | 1.8
Accounts payable related to collaborations |  |
Beginning balance | 5.4 | 13.1
Additions | 29.5 | 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 | 0.0 | 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 | 0.0 | 130.0
Revenue recognized from balances held at the beginning of the period | (211.2) | (56.3)
Revenue recognized from new collaborations | 0.0 | (23.7)
Ending balance | $ 237.0 | $ 599.2

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