ALLIANCES (Five Prime) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Alliances Statement [Line Items]
Upfront payments for licensing and alliance arrangements	$ 15	$ 619	$ 70
Contingent and regulatory milestone payments	938	2,325
Five Prime [Member]
Alliances Statement [Line Items]
Upfront payments for licensing and alliance arrangements		$ 350
Contingent and regulatory milestone payments	$ 1,400