Collaborative and Other Relationships - Summary of Activity Related to Sage Therapeutics (Details) - Sage Therapeutics - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2023
Forecast
Collaborative arrangements and non-collaborative arrangement transactions
Potential future milestone payments commitment to third party			$ 225.0
Research and development
Collaborative arrangements and non-collaborative arrangement transactions
Expense incurred by the collaboration	$ 34.8	$ 38.7
Expense reflected within statements of income	17.4	19.4
Selling, general and administrative
Collaborative arrangements and non-collaborative arrangement transactions
Expense incurred by the collaboration	38.2	18.4
Expense reflected within statements of income	$ 19.1	$ 9.2