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Other Financial Data (Investments) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 28, 2014
Dec. 31, 2013
Investments    
Short-term Investments $ 236 $ 232
Available-for-sale securities:
   
Investments    
Short-term Investments 34 35
Government, agency, and government-sponsored enterprise obligations
   
Investments    
Short-term Investments 15 15
Corporate bonds
   
Investments    
Short-term Investments 8 7
Mutual funds
   
Investments    
Short-term Investments 11 11
Common stock and equivalents
   
Investments    
Short-term Investments 0 2
Other investments, at cost
   
Investments    
Short-term Investments 185 182
Equity method investments
   
Investments    
Short-term Investments $ 17 $ 15