ALLIANCES - Selected Financial Information For Alliances (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Alliance Statement [Line Items]
Total Revenues		$ 12,201	$ 11,226	$ 24,066	$ 22,563
Cost of products sold	[1]	3,267	2,876	6,199	5,442
Marketing, selling and administrative		(1,928)	(1,934)	(4,295)	(3,696)
Other (income)/expense, net		273	(116)	354	(529)
Receivables – from alliance partners		11,423		11,423		$ 10,921
Accounts payable – to alliance partners		3,751		3,751		3,259
Net product sales
Alliance Statement [Line Items]
Total Revenues		11,925	10,917	23,484	21,965
Alliance revenues
Alliance Statement [Line Items]
Total Revenues		116	179	250	323
Collaborative Arrangement
Alliance Statement [Line Items]
Total Revenues		3,586	3,499	7,482	7,175
Cost of products sold		1,692	1,614	3,517	3,320
Marketing, selling and administrative		(65)	(64)	(144)	(138)
Research and development		46	36	100	80
Acquired IPRD		80	55	880	55
Other (income)/expense, net		(102)	(15)	(114)	(27)
Receivables – from alliance partners		290		290		233
Accounts payable – to alliance partners		1,627		1,627		1,394
Deferred income - from alliances		248		248		$ 274
Collaborative Arrangement | Net product sales
Alliance Statement [Line Items]
Total Revenues		$ 3,470	$ 3,320	$ 7,232	$ 6,852

[1] Excludes amortization of acquired intangible assets