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Pension And Other Postretirement Benefits (Weighted Average Assumptions Used To Determine Benefit Obligations) (Details)	12 Months Ended				12 Months Ended
	Dec. 31, 2008	Dec. 31, 2007	Dec. 31, 2011 Pension Benefits [Member]	Dec. 31, 2010 Pension Benefits [Member]	Dec. 31, 2011 Other Postretirement Benefits [Member]	Dec. 31, 2010 Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate			5.00%	5.65%	4.90%	5.60%
Rate of compensation increase			5.00%	5.00%	5.00%	5.00%
Health care cost trend rate assumed for current year	8.00%	7.00%			8.00%	7.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)					5.00%	5.00%
Year that the cost trend rate reaches the ultimate trend rate					2017	2015

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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