Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Assumptions Used To Determine Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011 Pension And SERPA Benefits [Member]	Dec. 31, 2010 Pension And SERPA Benefits [Member]	Dec. 31, 2009 Pension And SERPA Benefits [Member]	Dec. 31, 2011 Postretirement Healthcare Benefits [Member]	Dec. 31, 2010 Postretirement Healthcare Benefits [Member]	Dec. 31, 2009 Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, Benefit obligations		5.30%	5.79%	6.00%	4.90%	5.28%	5.65%
Rate of compensation, Benefit obligations		3.49%	3.49%	3.66%
Discount rate, Net periodic benefit cost		5.79%	6.00%	6.10%	5.28%	5.65%	6.10%
Expected return on plan assets	7.80%	8.00%	8.25%	8.25%	8.00%	8.25%	8.25%
Rate of compensation increase		3.49%	3.66%	3.64%