Goodwill and Acquired Intangibles - Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 10,806	$ 10,604
Acquisitions	17	189
Other	(10)	13
Goodwill, ending balance	10,813	10,806
Aeronautics
Goodwill [Roll Forward]
Goodwill, beginning balance	187	171
Acquisitions	0	16
Other	0	0
Goodwill, ending balance	187	187
MFC
Goodwill [Roll Forward]
Goodwill, beginning balance	2,091	2,089
Acquisitions	0	0
Other	(1)	2
Goodwill, ending balance	2,090	2,091
RMS
Goodwill [Roll Forward]
Goodwill, beginning balance	6,768	6,758
Acquisitions	0	0
Other	(9)	10
Goodwill, ending balance	6,759	6,768
Space Systems
Goodwill [Roll Forward]
Goodwill, beginning balance	1,760	1,586
Acquisitions	17	173
Other	0	1
Goodwill, ending balance	$ 1,777	$ 1,760