Commitments and Contingencies - Legal Contingencies (Details) $ in Millions		1 Months Ended	12 Months Ended
	Sep. 10, 2014 patent	Oct. 31, 2011 USD ($)	Dec. 31, 2017 USD ($)
Legal Contingencies
Orange Book-listed patents for 40 mg/ml Copaxone | patent	2
Amount of security bond required to be posted by company and Sandoz in connection with the litigation		$ 100.0
Maximum amount of security bond for which the entity shall be responsible in the event of loss of case			$ 35.0
Collateral for security bond			$ 17.5