Pension And Other Postretirement Benefits (Weighted Average Assumptions Used To Determine Net Periodic Benefit Costs) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets	7.75%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.65%	6.40%	6.50%
Expected long-term return on plan assets	7.75%	8.00%	8.25%
Rate of compensation increase	5.00%	5.00%	5.00%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.60%	6.30%	6.50%
Expected long-term return on plan assets	7.75%	8.00%	8.25%
Rate of compensation increase	5.00%	5.00%	5.00%