REVENUE - Reconciliation of Gross Product Sales to Net Product Sales (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Gross to Net Adjustments [Line Items]
Total Revenues	$ 48,194	$ 48,300	$ 45,006
Prior period gross to net adjustment impacted by new accounting pronouncement	(485)	(159)	(134)
Gross to net adjustments	(41,329)	(36,893)	(29,901)
United States
Gross to Net Adjustments [Line Items]
Total Revenues	33,279	34,105	31,210
Gross to net adjustments	(38,000)	(33,600)	(26,900)
Gross product sales
Gross to Net Adjustments [Line Items]
Total Revenues	88,085	83,671	73,679
Net product sales
Gross to Net Adjustments [Line Items]
Total Revenues	46,756	46,778	43,778
Charge-backs and cash discounts
Gross to Net Adjustments [Line Items]
Gross to net adjustments	(14,067)	(11,510)	(9,144)
Medicaid and Medicare rebates
Gross to Net Adjustments [Line Items]
Gross to net adjustments	(18,010)	(16,551)	(13,411)
Other rebates, returns, discounts and adjustments
Gross to Net Adjustments [Line Items]
Gross to net adjustments	$ (9,253)	$ (8,832)	$ (7,346)

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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