Acquisitions and Investments Acquisitions and Investments (Acquisition of Biodiesel Facility) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	1 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Apr. 30, 2014 Felda Iffco Sdn Bhd [Member]	Apr. 01, 2014 Felda Iffco Sdn Bhd [Member] gallons_per_year
Business Acquisition [Line Items]
Cash paid for acquisition	$ 42	$ 1,515	$ 40
Plant capacity volume				60,000,000

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration