Quarterly report pursuant to Section 13 or 15(d)

Investments (Details)

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Investments (Details) (USD $)
In Millions, unless otherwise specified
Jun. 27, 2014
Dec. 31, 2013
Trading Securities    
Trading Securities Unrealized Holding Gains (Losses) $ 39 $ 12
Marketable Securities 304 286
Other Assets 92 86
Equity Securities [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Total trading securities $ 396 $ 372