Document and Entity Information - USD ($) $ / shares in Units, $ in Billions	12 Months Ended
	Dec. 31, 2020	Jan. 29, 2021	Jun. 30, 2020	Dec. 31, 2019
Document And Enity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2020
Entity File Number	001-03492
Entity Registrant Name	HALLIBURTON COMPANY
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-2677995
Entity Address, Address Line One	3000 North Sam Houston Parkway East
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77032
City Area Code	281
Local Phone Number	871-2699
Title of 12(b) Security	Common Stock, par value $2.50 per share
Trading Symbol	HAL
Security Exchange Name	NYSE
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
Entity Shell Company	false
Entity Public Float			$ 10.1
Entity Common Stock, Shares Outstanding		888,632,775
Entity Central Index Key	0000045012
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock, Par or Stated Value Per Share	$ 2.50			$ 2.50
ICFR Auditor Attestation Flag	true