Legal and U.S. Regulatory Proceedings (Details) $ in Millions		3 Months Ended
	Oct. 20, 2017 USD ($)	Mar. 31, 2019 lawsuit defendant numberOfDrugs
Anti-Trust Lawsuit
Loss Contingencies [Line Items]
Number of putative class action antitrust lawsuits | lawsuit		13
Stayma
Loss Contingencies [Line Items]
Damages sought | $	$ 1.7
Minimum
Loss Contingencies [Line Items]
Number of defendants | defendant		36
Minimum | Opt Out | Anti-Trust Lawsuit
Loss Contingencies [Line Items]
Number of drugs involved | numberOfDrugs		24
Maximum
Loss Contingencies [Line Items]
Number of defendants | defendant		43
Maximum | Opt Out | Anti-Trust Lawsuit
Loss Contingencies [Line Items]
Number of drugs involved | numberOfDrugs		29