Restructuring - January 2018 Restructuring Initiative (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Remaining liability					$ 1.1
Employee separation, retention, and other benefit related costs | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				$ 22.1
Other restructuring charges
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 4.4	$ 1.7	$ 6.3	11.4
Other restructuring charges | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				1.7
Generic Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				23.8
Operating segments | Generic Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				10.8
Operating segments | Sterile Injectables | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				4.0
Operating segments | International Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				3.1
Operating segments | Branded Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				0.7
Corporate unallocated costs | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				$ 5.2