Goodwill and Intangible Assets - Changes In Carrying Amount of Goodwill by Reporting Unit (Details) $ in Millions	3 Months Ended
	Apr. 03, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 20,098	[1]
Other	16	[2]
Goodwill, end of period	20,114	[1]
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period	3,039	[1]
Other	(6)	[2]
Goodwill, end of period	3,033	[1]
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	297	[1]
Other	0	[2]
Goodwill, end of period	297	[1]
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	2,827	[1]
Other	18	[2]
Goodwill, end of period	2,845	[1]
Technologies
Goodwill [Roll Forward]
Goodwill, beginning of period	13,935	[1]
Other	4	[2]
Goodwill, end of period	13,939	[1]
Accumulated impairment losses	$ 1,800

[1] Goodwill in the Technologies reporting unit was net of $1.8 billion of accumulated impairment losses.

[2] Consisted primarily of adjustments for foreign currency translation.