Goodwill and Intangible Assets (Changes In Carrying Amount of Goodwill by Reporting Unit) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	$ 20,053		$ 19,677
Acquisitions		87		137	[2]
Other	[3]	(42)		239
Change in reporting unit composition				0
Goodwill, end of period		20,098	[4]	20,053	[1]
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	3,065		2,831
Acquisitions	[2]	33		72
Other	[3]	(59)		162
Change in reporting unit composition	[5]			0
Goodwill, end of period		3,039	[4]	3,065	[1]
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	297		297
Acquisitions	[2]	0		0
Other	[3]	0		0
Change in reporting unit composition	[5]			0
Goodwill, end of period		297	[4]	297	[1]
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	2,786		2,681
Acquisitions	[2]	54		65
Other	[3]	(13)		40
Change in reporting unit composition	[5]			0
Goodwill, end of period		2,827	[4]	2,786	[1]
Information Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	0		9,700
Acquisitions	[2]	0		0
Other	[3]	0		46
Change in reporting unit composition	[5]			(9,746)
Goodwill, end of period		0	[4]	0	[1]
Accumulated impairment loss		536
Mission Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	0		4,168
Acquisitions	[2]	0		0
Other	[3]	0		(9)
Change in reporting unit composition	[5]			(4,159)
Goodwill, end of period		0	[4]	0	[1]
Accumulated impairment loss		1,300
Technologies
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	13,905		0
Acquisitions	[2]	0		0
Other	[3]	30		0
Change in reporting unit composition	[5]			13,905
Goodwill, end of period		13,935	[4]	$ 13,905	[1]
Accumulated impairment loss		$ 1,800

[1] Goodwill in the Information Technology and Mission Systems reporting units was net of $536 and $1.3 billion of accumulated impairment losses, respectively.

[2] Included adjustments during the purchase price allocation period.

[3] Consisted primarily of adjustments for foreign currency translation. Activity for the year ended December 31, 2020, also included an allocation of goodwill to operations classified as held for sale.

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

[5] Effective December 31, 2020, we reorganized our Information Technology and Mission Systems operating segments into a single Technologies segment. This reorganization similarly changed the composition of our reporting units. Accordingly, goodwill of the Information Technology and Mission Systems reporting units was combined and assigned to the Technologies reporting unit.