RESTRUCTURING (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	$ 157	$ 211	$ 145
Other exit costs	6	15	29
Provision for restructuring	163	226	174
Workforce reduction of manufacturing, selling, administrative, and research and development personnel	1,387	1,450	1,205
Restructuring Reserve [Roll Forward]
Liability at January 1	102	167	77
Charges	155	249	178
Change in estimates	8	(23)	(4)
Foreign currency translation	(2)	4	(1)
Amylin acquisition			26
Liabilities related to assets held-for-sale		(67)
Spending	(107)	(228)	(109)
Liability at December 31	156	102	167
Specialty care transformation initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expected cost				$ 100