CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Oct. 01, 2021	Sep. 30, 2022	Oct. 01, 2021
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (301)	$ 479	$ 644	$ 1,358
Other comprehensive (loss) income:
Foreign currency translation loss, net of income taxes	(120)	(34)	(196)	(37)
Net unrealized loss on hedging derivatives, net of income taxes	(12)	(7)	(14)	0
Net unrecognized gain on postretirement obligations, net of income taxes	0	576	0	574
Other comprehensive (loss) income, recognized during the period	(132)	535	(210)	537
Reclassification adjustments for gains included in net (loss) income	(2)	(3)	(10)	(1)
Other comprehensive (loss) income, net of income taxes	(134)	532	(220)	536
Total comprehensive (loss) income	(435)	1,011	424	1,894
Comprehensive loss attributable to noncontrolling interests	1	2	2	4
Total comprehensive (loss) income attributable to L3Harris Technologies, Inc.	$ (434)	$ 1,013	$ 426	$ 1,898