Accounts and Notes Receivable (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable - trade	[1]	$ 3,969	$ 3,559	$ 3,969	$ 3,559	$ 3,649
Notes receivable - trade	[2]	1,403	1,605	1,403	1,605	194
Other	[3]	1,202	1,383	1,202	1,383	1,417
Accounts and notes receivable - net		6,574	6,547	6,574	6,547	5,260
Accounts Receivable, Allowance for Credit Loss, Current		170	105	170	105	127
Due from Affiliates		127	87	127	87	101
Factoring Agreement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade Receivables Sold		13	42	97	90
Trade Receivables, Outstanding, Element of Recourse				61	23	$ 37
Loss on Sale of Accounts Receivable		$ 4	$ 9	$ 41	$ 19

[1] Accounts receivable – trade is net of allowances of $170 million at September 30, 2019, $127 million at December 31, 2018, and $105 million at September 30, 2018. Allowances are equal to the estimated uncollectible amounts. That estimate is based on historical collection experience, current economic and market conditions, and review of the current status of customers' accounts.

[2] Notes receivable – trade primarily consists of receivables for deferred payment loan programs for the sale of seed products to customers. These loans have terms of one year or less and are primarily concentrated in North America. The company maintains a rigid pre-approval process for extending credit to customers in order to manage overall risk and exposure associated with credit losses. As of September 30, 2019, December 31, 2018, and September 30, 2018 there were no significant past due notes receivable which required a reserve, nor were there any significant impairments related to current loan agreements.

[3] Other includes receivables in relation to indemnification assets, value added tax, general sales tax and other taxes. No individual group represents more than 10 percent of total receivables. In addition Other includes amounts due from nonconsolidated affiliates of $127 million, $101 million, and $87 million as of September 30, 2019, December 31, 2018, and September 30, 2018, respectively.