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Segment Information - Pork Segment (Details)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 30, 2013
USD ($)
Dec. 31, 2015
segment
Sep. 27, 2014
Segment Information          
Number of reportable segments | segment       6  
Segment Information          
One-time Federal blender's credits recognized as revenue $ 17 $ 15 $ 11    
Pork          
Segment Information          
Percentage of ownership interest accounted as equity method investment 50.00%     50.00% 50.00%
One-time Federal blender's credits recognized as revenue $ 17 $ 15 $ 11    
Pork | Triumph          
Segment Information          
Percentage of ownership interest sold         50.00%