BASIS OF PRESENTATION AND RECENTLY ISSUED ACCOUNTING STANDARDS (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Schedule of Research and Development Expense [Line Items]
Research and development	$ 2,959	$ 2,580	$ 5,608	$ 4,837
Research
Schedule of Research and Development Expense [Line Items]
Research and development	274	291	567	605
Drug Development
Schedule of Research and Development Expense [Line Items]
Research and development	1,106	1,095	2,234	2,176
Other
Schedule of Research and Development Expense [Line Items]
Research and development	$ 1,579	$ 1,195	$ 2,808	$ 2,057

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
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-Section 50
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 730
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147479532/912-730-25-1

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