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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Other intangible assets    
Total $ 72,031 $ 72,418
Accumulated amortization (53,786) (53,315)
Other intangible assets 18,244 19,103
IPRD    
Other intangible assets    
IPRD 7,190 7,600
Other intangible assets $ 7,190 7,600
R&D technology    
Other intangible assets    
Estimated useful lives (in years) 6 years  
Gross carrying amounts $ 1,980 1,980
Accumulated amortization (688) (605)
Other intangible assets 1,293 1,375
Acquired marketed product rights    
Other intangible assets    
Gross carrying amounts 61,385 61,385
Accumulated amortization (52,000) (51,646)
Other intangible assets $ 9,384 9,739
Acquired marketed product rights | Minimum    
Other intangible assets    
Estimated useful lives (in years) 3 years  
Acquired marketed product rights | Maximum    
Other intangible assets    
Estimated useful lives (in years) 17 years  
Capitalized software    
Other intangible assets    
Gross carrying amounts $ 1,476 1,453
Accumulated amortization (1,099) (1,064)
Other intangible assets $ 377 $ 389
Capitalized software | Minimum    
Other intangible assets    
Estimated useful lives (in years) 3 years  
Capitalized software | Maximum    
Other intangible assets    
Estimated useful lives (in years) 10 years