Asset Impairment, Exit, and Restructuring Costs (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) item
Asset Impairment Charges And Exit Costs [Line Items]
Restructuring Charges	$ 29	$ 72	$ 21
Number of securities impaired | item			2
Restructuring, Settlement and Impairment Provisions	171	173	$ 55
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	0	0	6
Goodwill and Intangible Asset Impairment	9	0	11
Other Asset Impairment Charges	121	101	17
Corporate [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Restructuring Charges	24	54	4
Other Asset Impairment Charges	49		$ 2
Carbohydrate Solutions [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Other Asset Impairment Charges		63
Nutrition [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Other Asset Impairment Charges	11	$ 20
Oilseeds [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Other Asset Impairment Charges	36
Origination [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Other Asset Impairment Charges	$ 25