OTHER INCOME, NET - Summary of Other Expense (Income), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule Of Other Income And Expenses [Line Items]
Net loss on other sales of assets	$ 26	$ 0	$ 26	$ 25
Litigation and other matters	(40)	3	(30)	112
Other, net	(1)	0	0	(1)
Other income, net	(15)	(325)	(4)	(584)
iNova Sale
Schedule Of Other Income And Expenses [Line Items]
Gain on sale of business	0	(306)	0	(306)
Skincare Sale
Schedule Of Other Income And Expenses [Line Items]
Gain on sale of business	0	3	0	(316)
Dendreon Sale
Schedule Of Other Income And Expenses [Line Items]
Gain on sale of business	$ 0	$ (25)	$ 0	$ (98)