CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2025	Mar. 29, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 386	$ 285
Other comprehensive loss, net of income taxes:
Foreign currency translation and other, net	19	(29)
Pension and other postretirement benefits	(43)	0
Other comprehensive loss recognized during the period	(24)	(29)
Reclassification adjustments for gains included in net income	(17)	(7)
Other comprehensive loss	(41)	(36)
Total comprehensive income	345	249
Comprehensive income attributable to noncontrolling interest	0	(2)
Total comprehensive income attributable to L3Harris Technologies, Inc.	$ 345	$ 247