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AVAILABLE-FOR-SALE DEBT SECURITIES AND EQUITY SECURITIES - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Available-for-Sale Debt Securities
Allowance for credit losses	$ 0		$ 0
Equity investments and equity method investments without readily determinable fair values	366,000,000		366,000,000		$ 423,000,000
Net unrealized gain on investment of equity securities	69,000,000
Net unrealized loss on investment of equity securities		$ 303,000,000	187,000,000	$ 399,000,000
Selling, general and administrative expenses	$ 1,849,000,000	1,357,000,000	$ 3,168,000,000	$ 2,440,000,000
Related Party | Gilead Foundation
Available-for-Sale Debt Securities
Selling, general and administrative expenses		$ 85,000,000

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Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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