CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 404	$ 382	$ 1,056	$ 1,072
Other comprehensive income (loss):
Foreign currency translation income (loss), net of income taxes	43	(45)	22	(10)
Net unrealized income (loss) on hedging derivatives, net of income taxes	5	(3)	2	6
Net unrecognized gains on postretirement obligations, net of income taxes	0	0	3	0
Other comprehensive income (loss) recognized during the period	48	(48)	27	(4)
Gains (losses) reclassified to earnings, net of income taxes	(8)	(10)	(23)	(29)
Other comprehensive income (loss), net of income taxes	40	(58)	4	(33)
Total comprehensive income	444	324	1,060	1,039
Comprehensive (income) loss attributable to noncontrolling interest	(4)	1	(7)	(3)
Total comprehensive income attributable to L3Harris Technologies, Inc.	$ 440	$ 325	$ 1,053	$ 1,036