Acquisitions (Other Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 327
Trademarks and Brands [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 5
Recipes and Other [Member]
Schedule of Other Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 3
Customer Lists [Member]
Schedule of Other Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 197
Rights [Member]
Schedule of Other Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	33 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 122
Series of Individually Immaterial Business Acquisitions [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	161	$ 47	$ 41
Series of Individually Immaterial Business Acquisitions [Member] | Trademarks and Brands [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	5
Series of Individually Immaterial Business Acquisitions [Member] | Recipes and Other [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	3
Series of Individually Immaterial Business Acquisitions [Member] | Customer Lists [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	31
Series of Individually Immaterial Business Acquisitions [Member] | Rights [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	122
Eaststarch C.V. [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	166
Eaststarch C.V. [Member] | Trademarks and Brands [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	0
Eaststarch C.V. [Member] | Recipes and Other [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	0
Eaststarch C.V. [Member] | Customer Lists [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	166
Eaststarch C.V. [Member] | Rights [Member]
Schedule of Other Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 0