Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 733
Goodwill	3,385	$ 2,496
Goodwill and Intangible Asset Impairment	11	9	$ 0
Amortization of Intangible Assets	165	129	$ 122
Amortization expense of intangible assets next 12 months	180
Finite-Lived Intangible Assets, Amortization Expense, Year Two	180
Finite-Lived Intangible Assets, Amortization Expense, Year Three	178
Finite-Lived Intangible Assets, Amortization Expense, Year Four	168
Finite-Lived Intangible Assets, Amortization Expense, Year Five	161
Series of Individually Immaterial Business Acquisitions [Member]
Goodwill
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		132
Goodwill	900	$ 187
Protexin, Rodelle, and Algar Agro [Member]
Goodwill
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 733