Acquisitions (Asset Acquisitions) (Details) - USD ($) $ in Millions	1 Months Ended			3 Months Ended
	Feb. 28, 2022	Mar. 31, 2021	Jan. 31, 2021	Jun. 30, 2022
Business Acquisition [Line Items]
Acquired IPR&D Expense				$ 333.8
BioMarin Pharmaceutical Inc.
Business Acquisition [Line Items]
Acquired IPR&D Expense	$ 110.0
Rigel Pharmaceuticals, Inc.
Business Acquisition [Line Items]
Acquired IPR&D Expense		$ 125.0
Precision Biosciences, Inc.
Business Acquisition [Line Items]
Acquired IPR&D Expense			$ 107.8