ALLIANCES - Financial Information Pertaining to Alliances (Pfizer) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		$ 45,006	$ 46,159	$ 46,385
Cost of products sold – profit sharing	[1]	10,693	10,137	9,940
Other (income)/expense, net		(1,158)	576	(720)
Receivables		10,921	9,886
Accounts payable		3,259	3,040
Net product sales
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		43,778	44,671	45,055
Eliquis
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		12,206	11,789	10,762
Pfizer
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		12,206	11,789	10,762
Alliance revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		13,151	12,743	11,556
Cost of products sold – profit sharing		6,067	5,768	5,227
Other (income)/expense, net		(49)	(53)	(62)
Receivables		233	317
Accounts payable		1,394	1,249
Deferred income		274	289
Alliance revenues | Net product sales
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		12,543	12,001	10,840
Alliance revenues | Pfizer
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		200	301	331
Cost of products sold – profit sharing		5,833	5,604	5,064
Other (income)/expense, net		(42)	(42)	(36)
Receivables		169	191
Accounts payable		1,311	1,208
Deferred income		180	222
Alliance revenues | Pfizer | Net product sales
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		$ 12,006	$ 11,488	$ 10,431
Alliance revenues | Pfizer | Eliquis | Minimum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Percentage of reimbursement for development costs from alliance partner		50.00%
Alliance revenues | Pfizer | Eliquis | Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Percentage of reimbursement for development costs from alliance partner		60.00%

[1] Excludes amortization of acquired intangible assets.