v3.25.4
GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross  Carrying Amount $ 31,888 $ 31,879
Accumulated Amortization (17,211) (14,822)
Foreign Currency Translation Adjustment 0 1
Total 14,678 17,058
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]    
Gross  Carrying Amount 2,300 2,890
Foreign Currency Translation Adjustment 0 0
Net Carrying Amount 2,300 2,890
Intangible Assets, Net (Including Goodwill) [Abstract]    
Gross  Carrying Amount 34,188 34,769
Accumulated Amortization (17,211) (14,822)
Foreign Currency Translation Adjustment 0 1
Net Carrying Amount 16,978 19,948
In Process Research And Development NSCLC    
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]    
Gross  Carrying Amount 1,750 1,750
In Process Research And Development Bulevirtide    
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]    
Gross  Carrying Amount 550 1,100
Intangible asset – sofosbuvir    
Finite-Lived Intangible Assets [Line Items]    
Gross  Carrying Amount 10,720 10,720
Accumulated Amortization (8,448) (7,749)
Foreign Currency Translation Adjustment 0 0
Total 2,272 2,971
Intangible Assets, Net (Including Goodwill) [Abstract]    
Accumulated Amortization (8,448) (7,749)
Intangible asset – axicabtagene ciloleucel    
Finite-Lived Intangible Assets [Line Items]    
Gross  Carrying Amount 7,110 7,110
Accumulated Amortization (3,127) (2,721)
Foreign Currency Translation Adjustment 0 0
Total 3,983 4,389
Intangible Assets, Net (Including Goodwill) [Abstract]    
Accumulated Amortization (3,127) (2,721)
Intangible asset – Trodelvy    
Finite-Lived Intangible Assets [Line Items]    
Gross  Carrying Amount 11,730 11,730
Accumulated Amortization (4,164) (3,083)
Foreign Currency Translation Adjustment 0 0
Total 7,566 8,647
Intangible Assets, Net (Including Goodwill) [Abstract]    
Accumulated Amortization (4,164) (3,083)
Intangible asset – Hepcludex    
Finite-Lived Intangible Assets [Line Items]    
Gross  Carrying Amount 845 845
Accumulated Amortization (415) (329)
Foreign Currency Translation Adjustment 0 0
Total 430 516
Intangible Assets, Net (Including Goodwill) [Abstract]    
Accumulated Amortization (415) (329)
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross  Carrying Amount 1,483 1,474
Accumulated Amortization (1,056) (940)
Foreign Currency Translation Adjustment 0 1
Total 428 535
Intangible Assets, Net (Including Goodwill) [Abstract]    
Accumulated Amortization $ (1,056) $ (940)