Segment Information-Acquisition (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Feb. 07, 2016 USD ($)	Apr. 02, 2016 USD ($) segment $ / shares	Apr. 04, 2015 USD ($) $ / shares
Segment Information
Number of reportable segments | segment		6
Acquisition of business, cash consideration		$ 148
Christensen Farms & Feedlots, Inc. and Christensen Farms Midwest, LLC, Assets
Unaudited pro forma information:
Net sales		1,335	$ 1,489
Net earnings		$ 55	$ 32
Earnings per common share | $ / shares		$ 45.91	$ 27.25
Christensen Farms & Feedlots, Inc. and Christensen Farms Midwest, LLC, Assets | Pork
Segment Information
Acquisition of business, cash consideration	$ 148
Preliminary purchase price allocation
Inventories	33
Property, plant and equipment	111
Intangible assets	1
Goodwill	3
Total consideration transferred	148
Net sales from the date of acquisition		$ 20
Christensen Farms & Feedlots, Inc. and Christensen Farms Midwest, LLC, Assets | Pork | Maximum
Preliminary purchase price allocation
Acquisition costs	$ 1
Christensen Farms & Feedlots, Inc. and Christensen Farms Midwest, LLC, Assets | Pork | Customer relationships
Preliminary purchase price allocation
Weighted average useful life (in years)	1 year 7 months 6 days