CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,786	$ 2,586	$ 2,933	$ 5,825
Other comprehensive income:
Net foreign currency translation loss, net of tax	(81)	(20)	(102)	(15)
Available-for-sale debt securities:
Net unrealized loss, net of tax	(7)	0	(38)	(3)
Reclassifications to net income, net of tax	0	0	1	0
Net change	(7)	0	(37)	(3)
Cash flow hedges:
Net unrealized gain, net of tax	140	37	254	92
Reclassifications to net income, net of tax	(41)	18	(100)	60
Net change	99	55	154	152
Other comprehensive income	11	35	15	134
Comprehensive income	1,797	2,621	2,948	5,959
Comprehensive loss attributable to noncontrolling interest	3	6	19	18
Comprehensive income attributable to Gilead	$ 1,800	$ 2,627	$ 2,967	$ 5,977