ALLIANCES (Five Prime) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Alliances Statement [Line Items]
Upfront payments for licensing and alliance arrangements	$ 619
Five Prime [Member]
Alliances Statement [Line Items]
Upfront payments for licensing and alliance arrangements	350
Contingent and regulatory milestone payments	$ 1,400