Legal and U.S. Regulatory Proceedings (Details) $ in Millions		3 Months Ended
	Oct. 20, 2017 USD ($) drug	Mar. 31, 2018 drug generic_manufacturer_defendants lawsuit
Anti-Trust Lawsuit
Loss Contingencies [Line Items]
Number of putative class action antitrust lawsuits		12
Loss contingency, number of defendants | generic_manufacturer_defendants		34
Number of drugs involved | drug		29
Stayma
Loss Contingencies [Line Items]
Number of drugs involved | drug	2
Damages sought | $	$ 1.7
Opt Out | Anti-Trust Lawsuit
Loss Contingencies [Line Items]
Number of putative class action antitrust lawsuits		1
Loss contingency, number of defendants		35
Number of drugs involved		30
Motion To Dismiss | Anti-Trust Lawsuit
Loss Contingencies [Line Items]
Number of putative class action antitrust lawsuits		3