Retirement Benefits (Schedule Of Defined Benefit Plan Weighted Average Assumption Used In Calculating Net Periodic Benefit Cost) (Details)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pension Benefits [Member]
Expected return on plan assets	7.66%	8.04%
Discount rate	4.38%	4.91%
Rate of compensation increase	2.43%	3.09%
Postretirement Benefits [Member]
Expected return on plan assets	0.00%	0.00%
Discount rate	4.32%	5.05%
Rate of compensation increase	0.00%	0.00%