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Acquisitions and Divestitures (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 29, 2013
Mar. 30, 2012
Acquisition and investment activities    
Proceeds from disposals of businesses, equity method investments and nonmarketable securities $ 690 $ 11
Acquisitions of businesses, equity method investments and nonmarketable securities $ 28 $ 120