INCOME TAXES - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss carryforwards	$ 417	$ 430
Stock-based compensation	94	95
Reserves and accruals not currently deductible	644	645
Excess of tax basis over book basis of intangible assets	1,041	1,067
Upfront and milestone payments	1,271	1,298
Research and other credit carryforwards	283	233
Equity investments	221	196
Liability related to future royalties	296	278
Capitalized R&D expenditures	1,623	784
Other, net	320	263
Total deferred tax assets before valuation allowance	6,210	5,289
Valuation allowance	(663)	(599)
Total deferred tax assets	5,547	4,690
Deferred tax liabilities:
Property, plant and equipment	(274)	(234)
Excess of book basis over tax basis of intangible assets	(5,481)	(5,728)
Other	(184)	(160)
Total deferred tax liabilities	(5,939)	(6,122)
Net deferred tax assets (liabilities)	$ (392)	$ (1,432)