Investments in Variable Interest Entities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2007	Dec. 31, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Investment in biotechnology companies that are determined to be unconsolidated variable interest entities			$ 49.8	$ 23.6
City Therapeutics, Inc. | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Variable Interest Entity [Line Items]
Collaborative arrangements, investments in counterparty			30.0
Neela Therapeutics, Inc | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Variable Interest Entity [Line Items]
Collaborative arrangements, investments in counterparty			$ 5.0
Neurimmune
Variable Interest Entity [Line Items]
Research and development costs, percentage		100.00%
Deconsolidation, gain (loss)	$ 3.0