REVENUE - Reconciliation of Gross Product Sales to Net Product Sales (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gross to Net Adjustments [Line Items]
Total Revenues	$ 45,006	$ 46,159	$ 46,385
Gross to net adjustments	(29,901)	(24,962)	(22,842)
Prior period gross to net adjustment impacted by new accounting pronouncement	134	229	319
Gross product sales
Gross to Net Adjustments [Line Items]
Total Revenues	73,679	69,633	67,897
Net product sales
Gross to Net Adjustments [Line Items]
Total Revenues	43,778	44,671	45,055
Charge-backs and cash discounts
Gross to Net Adjustments [Line Items]
Gross to net adjustments	(9,144)	(7,469)	(7,253)
Medicaid and Medicare rebates
Gross to Net Adjustments [Line Items]
Gross to net adjustments	(13,411)	(11,362)	(9,374)
Other rebates, returns, discounts and adjustments
Gross to Net Adjustments [Line Items]
Gross to net adjustments	$ (7,346)	$ (6,131)	$ (6,215)