Other Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,600.1	$ 3,439.0	$ 10,706.6	$ 9,926.6
Royalty
Disaggregation of Revenue [Line Items]
Total revenues	3.3	7.9	9.9	35.8
Other corporate revenues
Disaggregation of Revenue [Line Items]
Total revenues	93.1	91.9	462.4	311.6
Revenues related to amendment of contract manufacturing agreement	500.0		500.0
Other
Disaggregation of Revenue [Line Items]
Total revenues	109.6	147.2	562.0	420.2
Collaborative arrangement | AbbVie
Disaggregation of Revenue [Line Items]
Total revenues	0.3	(0.7)	(0.2)	(7.9)
Collaborative arrangement | Samsung Bioepis
Disaggregation of Revenue [Line Items]
Total revenues	$ 12.9	$ 48.1	$ 89.9	$ 80.7