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Segment Information-DRC (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Dec. 31, 2017
Segment Information          
Total investment in affiliate $ 823   $ 823   $ 851
Loss from affiliates (18) $ (3) (40) $ (10)  
Commodity Trading and Milling          
Segment Information          
Total investment in affiliate 260   260   240
Loss from affiliates $ (4) $ (1) $ (10) $ 5  
Bakery business | Commodity Trading and Milling | Democratic Republic of Congo          
Segment Information          
Percentage of ownership interest accounted for as equity method investment 50.00%   50.00%    
Total investment in affiliate $ 0   $ 0    
Notes receivable from affiliates, net $ 8   $ 8   $ 15
Percentage of note receivable guaranteed by the other shareholder 50.00%   50.00%    
Loss from affiliates $ 3   $ 7