Acquisitions By Major Class (Details) - USD ($) $ in Millions				3 Months Ended	9 Months Ended
	Mar. 09, 2017	Dec. 29, 2016	Nov. 29, 2016	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Other disclosures
Consideration net of cash					$ 13
Increase in cost of sales for fair value mark-up of acquired inventory				$ 0	9
Pre-tax Acquisition and integration costs				$ 1	$ 3
Penford And Kerr Acquisitions
Other disclosures
Pre-tax Acquisition and integration costs						$ 2
TIC Gums
Other disclosures
Consideration net of cash		$ 396
Tangible assets		37
Shandong Huanong
Other disclosures
Cash consideration			$ 12
Tangible assets			$ 9
Sun Flour
Other disclosures
Cash consideration	$ 13
Total purchase consideration	18
Accrued expenses	5
Intangible Assets, Net (Including Goodwill)	$ 21
Fair Value, Inputs, Level 3 | TIC Gums | Customer relationships | Multi-period excess earnings method
Identifiable intangible assets
Fair Value		$ 94
Estimated Remaining Useful Life		20 years
Fair Value, Inputs, Level 3 | TIC Gums | Trade names | Relief-from-royalty method
Identifiable intangible assets
Fair Value		$ 35
Fair Value, Inputs, Level 3 | TIC Gums | Technology | Relief-from-royalty method
Identifiable intangible assets
Fair Value		$ 4
Estimated Remaining Useful Life		8 years