OTHER INCOME (NET) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Nonoperating Income (Expense) [Abstract]
Interest expense	$ 44	$ 48	$ 135	$ 145
Investment income	(44)	(32)	(118)	(87)
(Gain)/Loss on Investments	(97)	(5)	244	(17)
Provision for restructuring	(45)	(28)	(102)	(207)
Litigation and other settlements	11		10	(489)
Equity in net income of affiliates	(22)	(21)	(73)	(59)
Gain On Sale Of Product Lines Businesses And Assets	(108)	1	(178)	(126)
Royalties and licensing income	(338)	(209)	(1,058)	(1,093)
Transition and other service fees		(12)	(5)	(32)
Pension charges	(10)	(19)	(40)	(29)
Impairment of Intangible Assets, Finite-lived			64
Gain (Loss) on Extinguishment of Debt				(109)
Other	11	(11)	5	(26)
Other income (net)	508	$ 232	912	1,497
(Gain)/Loss on Equity Investment in Nektar	$ 100		$ (307)
Keytruda patent-infringement litigation settlement amount				481
Upfront licensing fees				$ 470