Revenue (Schedule of Revenue Recognized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 34,124.1	$ 28,541.4	$ 28,318.4
Net product revenue
Disaggregation of Revenue [Line Items]
Revenue	28,813.9	25,462.8	25,957.9
Collaboration and other revenue
Disaggregation of Revenue [Line Items]
Revenue	5,310.2	3,078.6	2,360.5
Collaboration and other revenue associated with prior period transfers of intellectual property
Disaggregation of Revenue [Line Items]
Revenue	$ 191.6	$ 163.4	$ 175.0