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Segment Information (Operating Business Segment) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jun. 30, 2012
Jul. 02, 2011
Business Segments Information        
Net Sales $ 2,148 $ 1,984 $ 4,104 $ 3,818
Operating earnings 278 159 510 328
Total other income (expense) (38) (98) (26) (95)
Earnings from continuing operations before income taxes 240 61 484 233
Government [Member]
       
Business Segments Information        
Net Sales 1,459 1,284 2,760 2,451
Operating earnings 197 105 347 204
Enterprise [Member]
       
Business Segments Information        
Net Sales 689 700 1,344 1,367
Operating earnings $ 81 $ 54 $ 163 $ 124