CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 985	$ 12
Other comprehensive loss, net:
Net foreign currency translation gain (loss)	(5)	5
Available-for-sale debt securities:
Net unrealized gain (loss), net of tax impact of $0 and $0, respectively	8	(19)
Reclassifications to net income, net of tax impact of $0 and $0, respectively	1	0
Net change	9	(19)
Cash flow hedges:
Net unrealized gain (loss), net of tax impact of $(1) and $3, respectively	(6)	24
Reclassification to net income, net of tax impact of $3 and $3, respectively	(21)	(20)
Net change	(26)	4
Other comprehensive loss, net	(22)	(10)
Comprehensive income, net	962	2
Comprehensive loss attributable to noncontrolling interest, net	26	7
Comprehensive income attributable to Gilead, net	$ 988	$ 9