Legal Proceedings (Details) - Gilead Litigation [Member] $ in Billions	1 Months Ended
	Mar. 31, 2016 USD ($) Claim Defense
Legal Proceedings [Abstract]
Number of asserted claims | Claim	10
Percentage of entitled past sales of sofosbuvir included in award	4.00%
Past sales of sofosbuvir included in award | $	$ 5
Number of additional non-jury defenses asserted | Defense	2