Other Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,534.3	$ 3,489.8
Royalty
Disaggregation of Revenue [Line Items]
Total revenues	11.4	3.9
Other corporate revenues
Disaggregation of Revenue [Line Items]
Total revenues	94.0	264.1
Revenues related to amendment of contract manufacturing agreement	500.0
Other
Disaggregation of Revenue [Line Items]
Total revenues	109.3	292.4
Collaborative arrangement | Samsung Bioepis
Disaggregation of Revenue [Line Items]
Total revenues	3.7	24.8
Collaborative arrangement | ZINBRYTA
Disaggregation of Revenue [Line Items]
Total revenues	$ 0.2	$ (0.4)