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Changes In Amount Of Goodwill (Detail) (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 28, 2014
Dec. 31, 2013
Goodwill [Roll Forward]    
Goodwill, beginning of period $ 11,932 [1]  
Other (176) [2]  
Goodwill, end of period 11,756  
Aerospace
    
Goodwill [Roll Forward]    
Goodwill, beginning of period 2,741 [1]  
Other (104) [2]  
Goodwill, end of period 2,637  
Combat Systems
    
Goodwill [Roll Forward]    
Goodwill, beginning of period 2,849 [1]  
Other (59) [2]  
Goodwill, end of period 2,790  
Marine Systems
    
Goodwill [Roll Forward]    
Goodwill, beginning of period 289 [1]  
Other 0 [2]  
Goodwill, end of period 289  
Information Systems and Technology
    
Goodwill [Line Items]    
Goodwill, Impaired, Accumulated Impairment Loss   1,994
Goodwill [Roll Forward]    
Goodwill, beginning of period 6,053 [1]  
Other (13) [2]  
Goodwill, end of period $ 6,040  
[1] Goodwill on December 31, 2013, in the Information Systems and Technology reporting unit is net of $1,994 of accumulated impairment losses.
[2] Consists primarily of adjustments for foreign currency translation.