CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income:	$ 5,613	$ 4,566	$ 6,201
Other comprehensive income (loss), net:
Net foreign currency translation gain (loss)	60	(11)	(38)
Available-for-sale debt securities:
Net unrealized gain (loss), net of tax impact of $0, $0 and $(1), respectively	26	(30)	(6)
Reclassifications to net income, net of tax impact of $0, $0 and $0, respectively	2	1	0
Net change	28	(29)	(6)
Cash flow hedges:
Net unrealized (loss) gain, net of tax impact of $(2), $20 and $18, respectively	(12)	130	129
Reclassifications to net income, net of tax impact of $7, $25 and $(9), respectively	(51)	(171)	58
Net change	(62)	(41)	187
Other comprehensive income (loss), net	26	(81)	143
Comprehensive income, net	5,639	4,485	6,344
Comprehensive loss attributable to noncontrolling interest, net	52	26	24
Comprehensive income attributable to Gilead, net	$ 5,691	$ 4,511	$ 6,368