Pension And Postretirement Obligations (Schedule Of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Healthcare cost trend	9.00%
Pension Benefits [Member]
Discount rate		4.25%
Expected return on plans	8.00%	8.00%
Discount rate		4.25%
Expected return on assets	8.00%	8.00%
Postretirement Benefits [Member]
Discount rate	3.60%	4.25%
Expected return on plans	8.00%	8.00%
Discount rate	3.60%	4.25%
Expected return on assets	8.00%	8.00%
Maximum [Member] | Pension Benefits [Member]
Discount rate	3.90%
Maximum [Member] | Postretirement Benefits [Member]
Healthcare cost trend	9.00%	8.50%
Minimum [Member] | Pension Benefits [Member]
Discount rate	3.70%
Minimum [Member] | Postretirement Benefits [Member]
Healthcare cost trend	5.00%	6.50%