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BASIS OF PRESENTATION AND RECENTLY ISSUED ACCOUNTING STANDARDS (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Property, Plant and Equipment [Line Items] |  |
Research and development | $ 2,257 | $ 2,695
Research |  |
Property, Plant and Equipment [Line Items] |  |
Research and development | 314 | 384
Drug Development |  |
Property, Plant and Equipment [Line Items] |  |
Research and development | 1,081 | 1,083
Other |  |
Property, Plant and Equipment [Line Items] |  |
Research and development | $ 861 | $ 1,228

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