Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Subsequent Events (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 14, 2014 Senior Notes Subsequent Event	Feb. 14, 2014 7.75% Senior Unsecured Note Due 2015 Senior Notes Subsequent Event	Feb. 14, 2014 9.75% Senior Unsecured Note Due 2016 Senior Notes Subsequent Event	Feb. 14, 2014 8.00% Senior Unsecured Note Due 2017 Senior Notes Subsequent Event	Dec. 31, 2013 Argentina
Subsequent Event [Line Items]
Aggregate carrying amount of investment	$ 1,010,000,000	$ 1,196,000,000	$ 1,422,000,000					$ 481,000,000
Tender offer to purchase senior notes				$ 300,000,000
Tender offer to purchase senior notes, interest rate of notes					7.75%	9.75%	8.00%