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INTANGIBLE ASSETS - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2020
Intangible Assets [Line Items]      
Aggregate amortization expense related to finite-lived intangible assets $ 546 $ 445  
In-process research and development impairment $ 0 2,700  
In Process Research And Development Trodelvy For HR+/HER2-      
Intangible Assets [Line Items]      
Indefinite-lived intangible assets, fair value   6,100  
In Process Research And Development Trodelvy For HR+/HER2- | Fair Value, Nonrecurring      
Intangible Assets [Line Items]      
In-process research and development impairment   $ 2,700  
Immunomedics | In Process Research And Development Trodelvy For HR+/HER2-      
Intangible Assets [Line Items]      
Indefinite-lived intangible assets     $ 8,800
Immunomedics | In Process Research And Development Trodelvy For HR+/HER2- | Discount Rate      
Intangible Assets [Line Items]      
Discount rate, measurement input   6.75%