CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,614	$ 1,039	$ (2,556)	$ 2,024
Other comprehensive income, net:
Net foreign currency translation gain (loss)	1	37	(16)	32
Available-for-sale debt securities:
Net unrealized (loss) gain, net of tax impact of $0, $0, $0 and $0, respectively	0	(3)	0	6
Reclassifications to net income (loss), net of tax impact of $0, $0, $0 and $0, respectively	0	1	5	1
Net change	0	(2)	5	7
Cash flow hedges:
Net unrealized gain (loss), net of tax impact of $4, $1, $11 and $0, respectively	28	5	81	(1)
Reclassifications to net income (loss), net of tax impact of $1, $1, $1 and $4, respectively	(5)	(9)	(5)	(29)
Net change	23	(4)	77	(30)
Other comprehensive income, net	24	31	65	9
Comprehensive income (loss), net	1,639	1,070	(2,491)	2,032
Comprehensive loss attributable to noncontrolling interest, net	0	(6)	0	(32)
Comprehensive income (loss) attributable to Gilead, net	$ 1,639	$ 1,076	$ (2,491)	$ 2,064