COVER PAGE - USD ($)	12 Months Ended
	Jun. 28, 2019	Aug. 16, 2019	Dec. 28, 2018
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jun. 28, 2019
Document Transition Report	false
Entity File Number	1-3863
Entity Registrant Name	L3HARRIS TECHNOLOGIES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	34-0276860
Entity Address, Address Line One	1025 West NASA Boulevard
Entity Address, City or Town	Melbourne,
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	32919
City Area Code	321
Local Phone Number	727-9100
Title of 12(b) Security	Common Stock, par value $1.00 per share
Trading Symbol	LHX
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			$ 15,387,329,782
Entity Common Stock, Shares Outstanding		223,280,849
Entity Central Index Key	0000202058
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--06-28