BASIS OF PRESENTATION AND RECENTLY ISSUED ACCOUNTING STANDARDS (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Schedule of Research and Development Expense [Line Items]
Research and development	$ 2,649	$ 2,257
Research
Schedule of Research and Development Expense [Line Items]
Research and development	293	314
Drug Development
Schedule of Research and Development Expense [Line Items]
Research and development	1,127	1,081
Other
Schedule of Research and Development Expense [Line Items]
Research and development	$ 1,229	$ 861

Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

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