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Goodwill and Acquired Intangibles - Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 10,799 $ 10,780
Other (30) 19
Acquisitions 298  
Goodwill, ending balance 11,067 10,799
Aeronautics    
Goodwill [Roll Forward]    
Goodwill, beginning balance 196 196
Other 0 0
Acquisitions 0  
Goodwill, ending balance 196 196
MFC    
Goodwill [Roll Forward]    
Goodwill, beginning balance 2,086 2,083
Other (1) 3
Acquisitions 0  
Goodwill, ending balance 2,085 2,086
RMS    
Goodwill [Roll Forward]    
Goodwill, beginning balance 6,741 6,726
Other (29) 15
Acquisitions 0  
Goodwill, ending balance 6,712 6,741
Space Systems    
Goodwill [Roll Forward]    
Goodwill, beginning balance 1,776 1,775
Other 0 1
Acquisitions 298  
Goodwill, ending balance $ 2,074 $ 1,776