Pensions And Other Postretirement Benefits (Schedule Of Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, Discount rate	5.00%	5.60%
Assumptions used to determine benefit obligations, Rate of compensation increase	3.90%	3.70%
Assumptions used to determine net periodic benefit cost, Discount rate	5.60%	5.80%
Assumptions used to determine net periodic benefit cost, Expected return on plan assets	8.30%	8.30%
Assumptions used to determine net periodic benefit cost, Rate of compensation increases	3.70%	3.80%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, Discount rate	4.80%	5.30%
Assumptions used to determine benefit obligations, Rate of compensation increase
Assumptions used to determine net periodic benefit cost, Discount rate	5.30%	6.00%
Assumptions used to determine net periodic benefit cost, Expected return on plan assets
Assumptions used to determine net periodic benefit cost, Rate of compensation increases