Cover - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2023	Feb. 16, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	000-19731
Entity Registrant Name	GILEAD SCIENCES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3047598
Entity Address, Address Line One	333 Lakeside Drive
Entity Address, City or Town	Foster City
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94404
City Area Code	650
Local Phone Number	574-3000
Title of 12(b) Security	Common Stock, par value, $0.001 per share
Trading Symbol	GILD
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 67.0
Entity Common Stock, Shares Outstanding		1,245,774,616
Documents Incorporated by Reference	Specified portions of the registrant’s proxy statement, which will be filed with the Commission pursuant to Regulation 14A in connection with the registrant’s 2024 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report.
Entity Central Index Key	0000882095
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false