CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 29, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 382	$ (301)	$ 1,072	$ 644
Other comprehensive loss:
Foreign currency translation loss, net of income taxes	(45)	(120)	(10)	(196)
Net unrealized (loss) income on hedging derivatives, net of income taxes	(3)	(12)	6	(14)
Other comprehensive (loss) income before reclassifications to earnings, net of income taxes	(48)	(132)	(4)	(210)
Reclassification adjustments for gains included in net income	(10)	(2)	(29)	(10)
Other comprehensive loss, net of income taxes	(58)	(134)	(33)	(220)
Total comprehensive income (loss)	324	(435)	1,039	424
Comprehensive loss (income) attributable to noncontrolling interest	1	1	(3)	2
Total comprehensive income (loss) attributable to L3Harris Technologies, Inc.	$ 325	$ (434)	$ 1,036	$ 426