BUSINESS COMBINATION - Merger-related Charges (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jan. 03, 2020	Dec. 31, 2021	Jan. 01, 2021	Jun. 28, 2019
Business Acquisition [Line Items]
Additional cost of sales related to the fair value step-up in inventory sold	$ 142	$ 0	$ 31	$ 0
L3Harris
Business Acquisition [Line Items]
Equity award acceleration charges, recognized upon change in control	70	0	0	0
Transaction costs, recognized as incurred	83	0	0	31
Additional cost of sales related to the fair value step-up in inventory sold	142	0	31	0
Restructuring charges, recognized as incurred	117	0	10	0
Facility consolidation costs	48	0	0	0
Integration costs, recognized as incurred	72	128	130	34
Total L3Harris Merger-related charges	$ 532	$ 128	$ 171	$ 65