BUSINESS COMBINATION - Pro Forma Results (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020	Jun. 28, 2019
Business Acquisition [Line Items]
Revenue from product sales and services — as reported	$ 9,263	$ 3,208	$ 17,814	$ 18,194	$ 12,856	$ 6,801
Income from continuing operations — as reported	$ 835	441	$ 1,843	$ 1,088	1,347	$ 953
L3Harris
Business Acquisition [Line Items]
Revenue from product sales and services — as reported		3,208			12,856
Revenue from product sales and services — pro forma		8,404			18,097
Income from continuing operations — as reported		441			1,347
Income from continuing operations — pro forma		$ 760			$ 1,652