Restructuring - January 2018 Restructuring Initiative (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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		$ 0.7		$ 22.6
Other restructuring charges
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 1.7	5.4	$ 1.9	9.7
Other restructuring charges | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		0.2		1.2
Generic Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		0.9		23.8
Operating segments | Generic Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		0.6		10.8
Operating segments | International Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		0.1		3.1
Operating segments | Branded Pharmaceuticals | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		$ 0.2		0.7
Operating segments | Sterile Injectables | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				4.0
Corporate unallocated costs | January 2018 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				$ 5.2