Balance Sheet Components (Other Current Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of other current liabilities [Line Items]
Accrued sales allowances	$ 570.7	$ 492.0
Payroll and employee benefit liabilities	746.8	741.9
Legal and professional accruals, including litigation accruals	297.2	715.6
Contingent consideration	375.0	199.7	$ 223.6
Accrued restructuring	95.3	233.5
Accrued interest	80.2	86.6
Fair value of financial instruments	187.0	61.0
Operating lease liability	80.6	86.7
Due to Biocon Biologics	22.5	0.0
Other	978.1	1,265.5
Other current liabilities	3,440.9	4,619.6
Variable Consideration
Schedule of other current liabilities [Line Items]
Accrued sales allowances	888.8	1,362.1
Other current liabilities
Schedule of other current liabilities [Line Items]
Contingent consideration	$ 64.4	$ 66.7	$ 100.5