Employee Benefit Plans (Details 14) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011 United States Pension Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2010 Foreign Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2011 Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined benefit plan estimated future benefit payments
2012	$ 448	$ 38	$ 109	$ 3
2013	424	41	111	3
2014	456	45	114	3
2015	457	50	117	3
2016	474	58	118	3
2017-2021	$ 2,687	$ 322	$ 605	$ 14

The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

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