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