Collaboration, License, and Other Agreements - BARDA, Other Transaction Agreement Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues		$ 3,362.7	$ 2,936.2	$ 9,682.9	$ 8,758.5
BARDA, Other Transaction Agreement
Disaggregation of Revenue [Line Items]
Percentage of costs required to be funded by collaborating party	70.00%
"Next Generation" Covid Antibodies | BARDA, Other Transaction Agreement | Collaboration revenue
Disaggregation of Revenue [Line Items]
Revenues		$ 34.2
US Government | "Next Generation" Covid Antibodies
Disaggregation of Revenue [Line Items]
Maximum transaction agreement payments				$ 326.0