Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Actuarial Assumptions Used In Determining Pension And Other Postretirement Benefit Obligation) (Details) (Pension PBO And Other Postretirement Benefit APBO [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Weighted-average rate of increase in future compensation levels	4.23%	4.23%
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	4.36%	5.10%
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	3.37%	4.40%
Minimum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	4.31%	5.10%
Maximum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	4.50%	5.20%