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Pension And Other Postretirement Benefits (Schedule Of Pension And Postretirement Plans Investment Policy And Weighted Average Asset Allocations) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 Plan Assets [Member]	Dec. 31, 2010 Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities		34.00%	36.00%
Debt securities		50.00%	52.00%
Other		16.00%	12.00%
Total		100.00%	100.00%
Equity securities, asset allocation, policy range minimum	20.00%
Equity securities, asset allocation, policy range maximum	55.00%
Debt securities, asset allocation, policy range minimum	30.00%
Debt securities, asset allocation, policy range maximum	65.00%
Other, asset allocation, policy range minimum	5.00%
Other, asset allocation, policy range maximum	25.00%

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The percentage of the fair value of debt securities to the fair value of total plan assets held as of the measurement date.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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



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The percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of investments other than debt securities, equity securities, and real estate to the fair value of total plan assets held as of the measurement date.

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The aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.

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