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Segment Information (Tables)
9 Months Ended
Sep. 30, 2011
Segment Information (Tables) [Abstract] 
Summary of Segment Information
 
                                 
    Third Quarter Ended     Year-to-Date Ended  
    September 30,
 		    September 24,
 		    September 30,
 		    September 24,
 		 
    2011     2010(1)     2011     2010(1)  
    (in millions)  
 
Net Sales:
                               
C3ISR
  $ 895     $ 797     $ 2,531     $ 2,397  
Government Services
    905       996       2,793       2,908  
AM&M
    671       772       1,975       2,316  
Electronic Systems
    1,401       1,379       4,125       4,141  
Elimination of intercompany sales
    (85 )     (109 )     (270 )     (337 )
                                 
Consolidated total
  $   3,787     $   3,835     $   11,154     $   11,425  
                                 
Operating Income:
                               
C3ISR
  $ 103     $ 84     $ 288     $ 289  
Government Services
    75       92       216       249  
AM&M
    61       54       183       172  
Electronic Systems
    167       207       513       579  
                                 
Consolidated total
  $ 406     $ 437     $ 1,200     $ 1,289  
                                 
Depreciation and amortization:
                               
C3ISR
  $ 12     $ 12     $ 35     $ 33  
Government Services
    8       9       25       27  
AM&M
    4       5       13       14  
Electronic Systems
    34       36       108       96  
                                 
Consolidated total
  $ 58     $ 62     $ 181     $ 170  
                                 
 
                 
    September 30,
 		    December 31,
 		 
    2011     2010(1)  
    (in millions)  
 
Total Assets:
               
C3ISR
  $ 2,074     $ 2,049  
Government Services
    3,172       3,212  
AM&M
    2,039       1,962  
Electronic Systems
    7,836       7,677  
Corporate
    332       551  
                 
Consolidated total
  $  15,453     $  15,451  
                 
 
 
(1) As a result of re-alignments of business units in the Company’s management and organizational structure as discussed in Note 2, sales of $27 million and $90 million were reclassified from the Government Services segment to the Electronic Systems segment and sales of $20 million and $58 million were reclassified from the C3ISR segment to the Government Services segment for the quarter and year-to-date periods ended September 24, 2010, respectively. In addition, operating income of $2 million and $8 million was reclassified from the Government Services segment to the Electronic Systems segment for the quarter and year-to-date periods ended September 24, 2010 and operating income of $2 million and $4 million was reclassified from the C3ISR segment to the Government Services segment for the quarter and year-to-date periods ended September 24, 2010, respectively. At December 31, 2010, $129 million of assets were reclassified from the Government Services segment to the Electronic Systems segment and $19 million of assets were reclassified from the C3ISR segment to the Government Services segment.