CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 470	$ 413	$ 945	$ 879
Other comprehensive (loss) income:
Foreign currency translation (loss) gain, net of income taxes	(73)	15	(76)	(3)
Net unrealized (loss) gain on hedging derivatives, net of income taxes	(7)	2	(2)	7
Net unrecognized loss on postretirement obligations, net of income taxes	0	(2)	0	(2)
Other comprehensive (loss) income, recognized during the period	(80)	15	(78)	2
Reclassification adjustments for (gains) losses included in net income	(2)	4	(8)	2
Other comprehensive (loss) income, net of income taxes	(82)	19	(86)	4
Total comprehensive income	388	432	859	883
Comprehensive loss attributable to noncontrolling interests	1	0	1	2
Total comprehensive income attributable to L3Harris Technologies, Inc.	$ 389	$ 432	$ 860	$ 885