Segment Information-Acquisition (Details) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Sep. 01, 2016 USD ($)	Feb. 07, 2016 USD ($)	Oct. 01, 2016 USD ($) $ / shares	Oct. 03, 2015 USD ($) $ / shares	Oct. 01, 2016 USD ($) segment $ / shares	Oct. 03, 2015 USD ($) $ / shares
Segment Information
Number of reportable segments | segment					6
Acquisition of business, cash consideration					$ 214
Texas Farm LLC, Christensen Farms And Feedlots Inc., Christensen Farms Midwest LLC and hog inventory and sow farm
Unaudited pro forma information:
Net sales			$ 1,344	$ 1,482	4,078	$ 4,495
Net earnings			$ 73		$ 198	$ 54
Earnings per common share | $ / shares			$ 62.71	$ 0.02	$ 169.27	$ 45.77
Texas Farm LLC | Pork
Segment Information
Acquisition of business, cash consideration	$ 59
Preliminary purchase price allocation
Inventories	16
Property, plant and equipment	42
Goodwill	3
Accounts payable	(2)
Total consideration transferred	59
Texas Farm LLC | Pork | Maximum
Preliminary purchase price allocation
Acquisition costs	$ 1
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			$ 39		$ 93
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
Hog inventory and sow farm | Pork
Segment Information
Acquisition of business, cash consideration					7
Preliminary purchase price allocation
Inventories			1		1
Property, plant and equipment			6		6
Hog inventory and sow farm | Pork | Maximum
Preliminary purchase price allocation
Acquisition costs			$ 1		$ 1