Goodwill and Acquired Intangibles - Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 10,780	$ 10,813
Acquisitions		3
Other	19	(36)
Goodwill, ending balance	10,799	10,780
Aeronautics
Goodwill [Roll Forward]
Goodwill, beginning balance	196	187
Acquisitions		0
Other	0	9
Goodwill, ending balance	196	196
MFC
Goodwill [Roll Forward]
Goodwill, beginning balance	2,083	2,090
Acquisitions		0
Other	3	(7)
Goodwill, ending balance	2,086	2,083
RMS
Goodwill [Roll Forward]
Goodwill, beginning balance	6,726	6,759
Acquisitions		3
Other	15	(36)
Goodwill, ending balance	6,741	6,726
Space Systems
Goodwill [Roll Forward]
Goodwill, beginning balance	1,775	1,777
Acquisitions		0
Other	1	(2)
Goodwill, ending balance	$ 1,776	$ 1,775