Property and Equipment - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 2,348.2	$ 2,135.7
Less: accumulated depreciation	(1,188.9)	(1,027.3)
Total property and equipment, net	1,159.3	1,108.4
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	928.6	903.1
Laboratory equipment, other equipment and furniture
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	579.1	476.5
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	474.6	410.9
Computers and software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	332.8	312.1
Land
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 33.1	$ 33.1