Asset Impairment, Exit, and Restructuring Costs (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended				12 Months Ended						3 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2014		Dec. 31, 2013		Jun. 30, 2012		Sep. 30, 2012
Asset Impairment Charges And Exit Costs [Line Items]
Relocation and restructuring costs	$ 0		$ 0		$ 64	[1]	$ 0		$ 71	[1]
Restructuring, Settlement and Impairment Provisions	146		352		105		259		449
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	0		13	[2]	6	[2]	166	[2]	25	[2]
Other Asset Impairment Charges	0		339	[3]	35	[3]	84	[3]	353	[3]
Equity Method Investment, Other than Temporary Impairment	146	[4]	0		0		0		0
Gruma S.A.B. de C.V. [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Equity Method Investment, Other than Temporary Impairment											146
Restructuring settlement and impairment provisions per share											$ 0.16
Cumulative translation losses											123
Corporate [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net							11
Other Asset Impairment Charges							15		4
Agricultural Services [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net							155
Other Asset Impairment Charges					17		3
Corn Processing [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Other Asset Impairment Charges					15		62		349
Oilseeds Processing
Asset Impairment Charges And Exit Costs [Line Items]
Other Asset Impairment Charges					3		4
Relocation costs [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Relocation and restructuring costs					16
Restructuring Charges [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Relocation and restructuring costs					48
One-time Termination Benefits [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Relocation and restructuring costs									37
Remeasurement charges [Member]
Asset Impairment Charges And Exit Costs [Line Items]
Relocation and restructuring costs									$ 34

[1] Relocation and restructuring costs recognized in the year ended December 31, 2014 consisted of costs associated with the relocation of the Company’s global headquarters to Chicago, Illinois, of $16 million and restructuring charges related to the Wild Flavors acquisition and Toepfer integration following the acquisition of the minority interest and other restructuring charges of $48 million. In the year ended June 30, 2012, these costs primarily consisted of $37 million of one-time termination benefits provided to employees who have been involuntarily terminated and $34 million for pension and postretirement remeasurement charges triggered by an amendment of the Company's U.S. plans due to the voluntary early retirement program.

[2] Asset impairment charge - equity securities for the fiscal year ended December 31, 2014, the six months ended December 31, 2011 and the year ended June 30, 2012 consisted of other-than-temporary investment writedowns of available for sale securities in Corporate. Asset impairment charge - equity securities for the fiscal year ended December 31, 2013 consisted of other-than-temporary impairment charges of $155 million on the Company's GrainCorp investment in the Agricultural Services segment and $11 million on one other available for sale security in Corporate.

[3] Asset impairments for the fiscal year ended December 31, 2014 consisted of property, plant, and equipment asset impairments of $3 million in the Oilseeds Processing segment, $15 million in the Corn Processing segment, and $17 million in the Agricultural Services segment. Asset impairments for the fiscal year ended December 31, 2013 consisted of property, plant, and equipment asset impairments of $4 million in the Oilseeds Processing segment, $62 million in the Corn Processing segment, $3 million in the Agricultural Services segment, and $15 million in Corporate. Asset impairments for the six months ended December 31, 2011 consisted of asset impairment charges and other costs related to the exit of the Clinton, IA, bioplastics facility in the Corn Processing segment. Asset impairment charges for the fiscal year ended June 30, 2012 consisted of asset impairment charges and other costs of $349 million related to the exit of the Clinton, IA, bioplastics and Walhalla, ND, ethanol facilities in the Corn Processing segment and other facility exit-related costs of $4 million in Corporate.

[4] As part of the Company’s ongoing portfolio management, the Company decided to divest its interests in Gruma S.A.B. de C.V. and related joint ventures (“Gruma”). As a result, the Company’s equity method investments in Gruma were evaluated for impairment. In the quarter ended September 30, 2012, the Company recorded a $146 million pre-tax asset impairment charge ($0.16 per share after tax) on its investments in Gruma by comparing the carrying value, including $123 million of cumulative unrealized foreign currency translation losses, to estimated fair value. Fair value was estimated based on negotiations which resulted in the Company entering into a non-binding letter of intent to sell its interests in Gruma to a third party on October 16, 2012. The Company sold its interest in Gruma in December 2012.