OTHER INCOME (NET) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Nonoperating Income (Expense) [Abstract]
Interest expense	$ 45	$ 52	$ 91	$ 97
Investment income	(38)	(29)	(74)	(55)
(Gain)/Loss on Investments	356	(5)	341	(12)
Provision for restructuring	(37)	(15)	(57)	(179)
Litigation and other settlements	(1)	(5)	(1)	(489)
Equity in net income of affiliates	(27)	(20)	(51)	(38)
Gain On Sale Of Product Lines Businesses And Assets	(25)	0	(70)	(127)
Royalties and licensing income	(353)	(685)	(720)	(884)
Transition and other service fees	(1)	(13)	(5)	(20)
Pension charges	(19)	(11)	(30)	(10)
Impairment of Intangible Assets, Finite-lived	0	0	64	0
Gain (Loss) on Extinguishment of Debt	0	109	0	109
Other	22	6	(6)	(15)
Other (income)/expense	(4)	$ (586)	$ (404)	(1,265)
(Gain)/Loss on Equity Investment in Nektar	$ 407
Keytruda patent-infringement litigation settlement amount				481
Upfront licensing fees				$ 470