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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Jan. 03, 2016
Dec. 28, 2014
Property, Plant and Equipment, Net [Abstract]    
Land and land improvements $ 780 $ 833
Buildings and building equipment 9,829 10,046
Machinery and equipment 22,511 22,206
Construction in progress 3,528 3,600
Total property, plant and equipment, gross 36,648 36,685
Less accumulated depreciation 20,743 20,559
Total property, plant and equipment, net $ 15,905 $ 16,126