OTHER EXPENSE (INCOME), NET (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Nonoperating Income (Expense) [Abstract]
Interest expense	$ 346		$ 209	$ 1,065	$ 377
Pension and postretirement	0		1,537	(6)	1,607
Royalties and licensing income	(403)		(356)	(1,124)	(967)
Divestiture losses/(gains)	1		(1,179)	(6)	(1,171)
Acquisition expenses	0		7	0	475
Contingent consideration	(988)		0	(597)	0
Investment income	(13)		(173)	(99)	(348)
Integration expenses	195		96	535	224
Provision for restructuring	176		10	451	32
Equity investment (gains)/losses	(244)		261	(724)	15
Litigation and other settlements	10		(1)	41	0
Transition and other service fees	(18)		(7)	(129)	(11)
Intangible asset impairment	0		0	21	15
Reversion excise tax	0	$ 76	0	76	0
Other	23		6	8	1
Other (income)/expense, net	$ (915)		$ 410	$ (488)	$ 249