Segment Information - Summary of Financial Information (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jul. 02, 2023		Jul. 03, 2022		Jul. 02, 2023	Jul. 03, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 10,152		$ 9,189		$ 20,033	$ 18,581
Operating Earnings	962		978		1,900	1,886
Aerospace
Segment Reporting Information [Line Items]
Total revenue	1,953		1,867		3,845	3,770
Marine Systems
Segment Reporting Information [Line Items]
Total revenue	3,059		2,651		6,051	5,302
Combat Systems
Segment Reporting Information [Line Items]
Total revenue	1,924		1,666		3,680	3,341
Technologies
Segment Reporting Information [Line Items]
Total revenue	3,216		3,005		6,457	6,168
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Total revenue	1,953		1,867		3,845	3,770
Operating Earnings	236		238		465	481
Operating Segments | Marine Systems
Segment Reporting Information [Line Items]
Total revenue	3,059		2,651		6,051	5,302
Operating Earnings	235		211		446	422
Operating Segments | Combat Systems
Segment Reporting Information [Line Items]
Total revenue	1,924		1,666		3,680	3,341
Operating Earnings	251		245		496	472
Operating Segments | Technologies
Segment Reporting Information [Line Items]
Total revenue	3,216		3,005		6,457	6,168
Operating Earnings	283		304		582	602
Corporate
Segment Reporting Information [Line Items]
Total revenue	0	[1]	0	[1]	0	0
Operating Earnings	$ (43)	[1]	$ (20)	[1]	$ (89)	$ (91)

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