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INTANGIBLE ASSETS - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Intangible Assets [Line Items]
In-process research and development impairments	$ 0		$ 1,750		$ 190	$ 4,180
In Process Research And Development Bulevirtide
Intangible Assets [Line Items]
In-process research and development impairments		$ 190
In Process Research And Development Bulevirtide | Discount Rate
Intangible Assets [Line Items]
Discount rate, measurement input (as a percent)		8.25%
In Process Research And Development NSCLC
Intangible Assets [Line Items]
In-process research and development impairments			$ 1,800	$ 2,400		$ 4,200
In Process Research And Development NSCLC | Immunomedics | Discount Rate
Intangible Assets [Line Items]
Discount rate, measurement input (as a percent)			7.00%	7.00%		7.00%

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