OTHER EXPENSE (INCOME), NET (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Nonoperating Income (Expense) [Abstract]
Interest expense	$ 353	$ 362
Contingent consideration	(510)	556
Royalties and licensing income	(367)	(410)
Equity investment (gains)/losses	(601)	338
Integration expenses	141	174
Provision for restructuring	45	160
Litigation and other settlements	(8)	32
Transition and other service fees	(15)	(61)
Investment income	(9)	(61)
Reversion excise tax	0	76
Divestiture losses/(gains)	0	(16)
Gain (Loss) on Extinguishment of Debt	281	0
Other	(12)	13
Other (income)/expense, net	$ (702)	$ 1,163