ALLIANCES - Selected Financial Information For Alliances (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Alliance Statement [Line Items]
Total revenues		$ 10,966	$ 11,218	$ 33,529	$ 34,753
Cost of products sold	[1]	2,506	2,353	7,948	7,544
Marketing, selling and administrative		(2,003)	(1,930)	(5,699)	(5,548)
Other (income)/expense, net		(258)	(140)	(787)	793
Receivables – from alliance partners		10,304		10,304		$ 9,886
Accounts payable – to alliance partners		2,813		2,813		3,040
Net product sales
Alliance Statement [Line Items]
Total revenues		10,645	10,813	32,610	33,606
Alliance revenues
Alliance Statement [Line Items]
Total revenues		138	173	461	560
Collaborative Arrangement
Alliance Statement [Line Items]
Total revenues		2,900	2,895	10,075	9,794
Cost of products sold		1,330	1,328	4,650	4,456
Marketing, selling and administrative		(52)	(53)	(190)	(160)
Research and development		1	6	81	40
Acquired IPRD		0	0	55	100
Other (income)/expense, net		(10)	(18)	(37)	(41)
Receivables – from alliance partners		209		209		317
Accounts payable – to alliance partners		1,288		1,288		1,249
Deferred income from - alliances		289		289		$ 289
Collaborative Arrangement | Net product sales
Alliance Statement [Line Items]
Total revenues		$ 2,762	$ 2,722	$ 9,614	$ 9,234

[1] Excludes amortization of acquired intangible assets