The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph g

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 (g)

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

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

Employee Benefits (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended	3 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended		12 Months Ended
	Sep. 30, 2012	Dec. 31, 2012 Scenario, Forecast [Member]	Dec. 31, 2012 Scenario, Forecast [Member]	Dec. 31, 2011 Scenario, Forecast [Member]	Sep. 30, 2012 U.S. [Member]	Dec. 31, 2012 U.S. [Member] Scenario, Forecast [Member]	Dec. 31, 2011 U.S. [Member] Scenario, Forecast [Member]	Dec. 31, 2012 International [Member] Scenario, Forecast [Member]	Dec. 31, 2011 International [Member] Scenario, Forecast [Member]
Employee Benefits (Textual) [Abstract]
Maximum annual increase percentage to company contribution for retiree medical coverage	4.00%
Defined benefit plan estimated future employer contributions in next fiscal year				$ 900			$ 600		$ 300
Contribution to employee pension plan	1,030		1,150		840	850		300
Contribution to other post retirement plans	$ 150	$ 70