Revenues Other Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ (3,489.8)	$ (3,131.1)
Royalty
Disaggregation of Revenue [Line Items]
Total revenues	(3.9)	(10.6)
Other corporate revenues
Disaggregation of Revenue [Line Items]
Total revenues	(264.1)	(140.6)
Other
Disaggregation of Revenue [Line Items]
Total revenues	(292.4)	(164.4)
Collaborative arrangement | AbbVie
Disaggregation of Revenue [Line Items]
Total revenues	(0.4)	(4.7)
Collaborative arrangement | Samsung Bioepis
Disaggregation of Revenue [Line Items]
Total revenues	$ (24.8)	$ (17.9)