Balance Sheet Components (Other Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule of Other Assets [Line Items]
Operating lease right-of-use assets	$ 245.6	$ 259.3
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Other long-term assets	$ 821.1	$ 753.3
Other assets	2,208.7	2,403.5
Biocon Biologics
Schedule of Other Assets [Line Items]
Deferred consideration due from Biocon Biologics	0.0	299.5
Convertible Preferred Stock
Schedule of Other Assets [Line Items]
Equity Securities, FV-NI, Cost	976.3	997.4
Private Equity Securities
Schedule of Other Assets [Line Items]
Equity Securities, FV-NI, Cost	$ 165.7	$ 94.0