CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2025	Dec. 29, 2023	Dec. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,512	$ 1,198	$ 1,061
Other comprehensive income (loss):
Foreign currency translation, net of income taxes	(60)	36	(119)
Hedging derivatives, net of income taxes	(12)	10	(8)
Pension and other postretirement benefits, net of income taxes	323	71	(26)
Other comprehensive income (loss) recognized during the period	251	117	(153)
Reclassification adjustments for (gains) losses included in net income	(26)	(27)	11
Other comprehensive income (loss), net of income taxes	225	90	(142)
Total comprehensive income	1,737	1,288	919
Comprehensive (income) loss attributable to noncontrolling interest	(10)	29	1
Total comprehensive income attributable to L3Harris Technologies, Inc.	$ 1,727	$ 1,317	$ 920