Balance Sheet Components (Other noncurrent liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Other Noncurrent Liabilities [Line Items]
Employee benefit liabilities	$ 504.3	$ 544.6
Contingent consideration	215.1	375.0	$ 199.7
Tax related items, including contingencies	399.3	414.6
Operating lease liability	165.4	181.4
Accrued restructuring	59.2	60.4
Other	249.7	244.9
Other Liabilities, Noncurrent	1,516.9	1,756.5
Biocon Biologics
Schedule of Other Noncurrent Liabilities [Line Items]
Contingent consideration	15.8	221.2
Other Noncurrent Liabilities
Schedule of Other Noncurrent Liabilities [Line Items]
Contingent consideration	$ 139.0	$ 310.6	$ 133.0