Collaborative and Other Relationships - Eisai (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Eisai
Collaborative arrangements and non-collaborative arrangement transactions
Amounts receivable	$ 115.5	$ 16.7
Amounts payable	$ 122.6	$ 138.0
Alzheimer's collaboration revenue
Collaborative arrangements and non-collaborative arrangement transactions
Share of non-controling interest recognized	50.00%