Business Combination - Pro Forma Results (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Business Acquisition [Line Items]
Revenue from product sales and services — as reported	$ 4,463	$ 4,431	$ 13,534	$ 8,024
Income from continuing operations — as reported	$ 431	$ 435	$ 904	947
L3Harris
Business Acquisition [Line Items]
Revenue from product sales and services — as reported				8,024
Revenue from product sales and services — pro forma				13,265
Income from continuing operations — as reported				947
Income from continuing operations — pro forma				$ 1,252