Segment Information - Summary of Financial Information (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 03, 2022	Apr. 04, 2021
Segment Reporting Information [Line Items]
Revenue		$ 9,392	$ 9,389
Operating Earnings		908	938
Aerospace
Segment Reporting Information [Line Items]
Revenue		1,903	1,887
Marine Systems
Segment Reporting Information [Line Items]
Revenue		2,651	2,483
Combat Systems
Segment Reporting Information [Line Items]
Revenue		1,675	1,820
Technologies
Segment Reporting Information [Line Items]
Revenue		3,163	3,199
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Revenue		1,903	1,887
Operating Earnings		243	220
Operating Segments | Marine Systems
Segment Reporting Information [Line Items]
Revenue		2,651	2,483
Operating Earnings		211	200
Operating Segments | Combat Systems
Segment Reporting Information [Line Items]
Revenue		1,675	1,820
Operating Earnings		227	244
Operating Segments | Technologies
Segment Reporting Information [Line Items]
Revenue		3,163	3,199
Operating Earnings		298	306
Corporate
Segment Reporting Information [Line Items]
Revenue	[1]	0	0
Operating Earnings	[1]	$ (71)	$ (32)

[1] (a)See Note B for additional revenue information by segment. (b)Corporate operating results consist primarily of equity-based compensation expense.