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Inventories (Details) - USD ($)
$ in Millions
Jun. 28, 2020
Dec. 29, 2019
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 1,303 $ 1,117
Goods in process 1,962 1,832
Finished goods 6,159 6,071
Total inventories $ 9,424 $ 9,020