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Property, Plant And Equipment (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Oct. 01, 2016
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 11,942 $ 11,167
Less accumulated depreciation 6,374 5,997
Net property, plant and equipment 5,568 5,170
Amount required to complete construction of buildings and equipment under construction 1,387  
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 138 126
Buildings And Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 3,878 3,662
Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 7,111 6,789
Land Improvements And Other [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 323 300
Buildings And Equipment Under Construction [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 492 $ 290