CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Income Statement [Abstract]
Revenue from product sales and services	$ 4,693	$ 4,135	$ 9,164	$ 8,238
Cost of product sales and services	(3,476)	(2,907)	(6,763)	(5,767)
Engineering, selling and administrative expenses	(783)	(744)	(1,556)	(1,489)
Business divestiture-related gains, net	26	0	26	0
Impairment of other assets	(60)	0	(78)	0
Non-operating income, net	83	108	165	214
Interest expense, net	(111)	(67)	(213)	(135)
Income before income taxes	372	525	745	1,061
Income taxes	(21)	(55)	(55)	(116)
Net income	351	470	690	945
Noncontrolling interests, net of income taxes	(2)	1	(4)	1
Net income attributable to L3Harris Technologies, Inc.	$ 349	$ 471	$ 686	$ 946
Net income per common share attributable to L3Harris Technologies, Inc. common shareholders
Basic (in dollars per share)	$ 1.84	$ 2.45	$ 3.61	$ 4.91
Diluted (in dollars per share)	$ 1.83	$ 2.42	$ 3.60	$ 4.86
Basic weighted average common shares outstanding (in shares)	189.2	192.1	189.7	192.6
Diluted weighted average common shares outstanding (in shares)	190.1	194.0	190.7	194.5