Goodwill and Other Intangibles - Accumulated Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Accumulated impairment losses	$ 4,492,966	$ 4,498,884
Branded Pharmaceuticals
Goodwill [Line Items]
Accumulated impairment losses	855,810	855,810
Sterile Injectables
Goodwill [Line Items]
Accumulated impairment losses	0	0
Generic Pharmaceuticals
Goodwill [Line Items]
Accumulated impairment losses	3,142,657	3,142,657
International Pharmaceuticals
Goodwill [Line Items]
Accumulated impairment losses	$ 494,499	$ 500,417