Legal Proceedings, Guarantees, and Commitments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013
Schedule of legal settlement [Line Items]
Contingent obligations, for debt guarantee agreements related to equity-method investees	$ 37
UNITED STATES
Schedule of legal settlement [Line Items]
Legal Settlement	54
UNITED STATES \| Securities and Exchange Commission [Member]
Schedule of legal settlement [Line Items]
Legal Settlement	36
UNITED STATES \| Department of Justice [Member]
Schedule of legal settlement [Line Items]
Legal Settlement	18
GERMANY
Schedule of legal settlement [Line Items]
Legal Settlement	$ 1

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant