AVAILABLE-FOR-SALE DEBT SECURITIES AND EQUITY SECURITIES - Additional Information (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Galapagos
Available-for-Sale Debt Securities
Equity securities subject to contractual sale restrictions	$ 417	$ 686
Arcus
Available-for-Sale Debt Securities
Marketable equity securities	$ 458	$ 283

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details