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Intangible Assets And Goodwill (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Intangible Assets And Goodwill    
Amortization expense on intangibles $ 6 $ 6
Finite-Lived Intangible Assets, Future Amortization Expense    
2013 25  
2014 23  
2015 18  
2016 18  
2017 $ 15