Accounts and Notes Receivable (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable - trade	[1]	$ 4,811	$ 4,261	$ 4,811	$ 4,261	$ 3,649
Notes receivable - trade	[2]	1,291	1,625	1,291	1,625	194
Other	[3]	1,332	1,445	1,332	1,445	1,417
Accounts and notes receivable - net		7,434	7,331	7,434	7,331	5,260
Allowance for Doubtful Accounts Receivable, Current		152	80	152	80	127
Factoring Agreement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade Receivables Sold		81	20	84	48
Trade Receivables, Outstanding, Element of Recourse				87	57	$ 37
Loss on Sale of Accounts Receivable		$ 36	$ 5	$ 37	$ 10

[1] Accounts receivable – trade is net of allowances of $152 million at June 30, 2019, $127 million at December 31, 2018, and $80 million at June 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 June 30, 2019, December 31, 2018, and June 30, 2018 there were no significant past due notes receivable, 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.