Business Combination - Pro Forma Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Business Acquisition [Line Items]
Revenue from product sales and services — as reported	$ 4,445	$ 1,865	$ 9,071	$ 3,593
Income from continuing operations — as reported	$ 278	269	$ 473	512
L3Harris
Business Acquisition [Line Items]
Revenue from product sales and services — as reported		1,865		3,593
Revenue from product sales and services — pro forma		4,448		8,834
Income from continuing operations — as reported		269		512
Income from continuing operations — pro forma		$ 417		$ 817