Pensions and Postretirement Benefits Other Than Pensions (Schedule of Defined Benefit Plan Weighted Average Discount Rate Assumptions) (Details) (Postretirement [Member])	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Benefit obligations at December 31	4.00%	5.00%	5.50%
Net periodic benefit cost	5.00%	5.50%	6.25%
Year that the rate reaches the ultimate trend rate	2021	2021	2021
current year medical inflation [Member]
Ultimate inflation rate	8.45%	8.85%	9.25%
ultimate inflation rate [Member]
Ultimate inflation rate	5.00%	5.00%	5.00%

The interest rate used to adjust for the time value of money for the plan.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph j

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 (k)(1)

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

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