Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Actuarial Assumptions Used In Determining Net Periodic And Other Postretirement Benefit Obligation) (Details) (Net Periodic Pension And Other Postretirement Benefit Costs [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted-average rate of increase in future compensation levels	4.23%	4.23%	4.23%
Other Postretirement [Member]
Weighted-average discount rate	5.10%	5.50%	6.10%
Non-Qualified Pension Plans [Member]
Weighted-average discount rate	4.40%	4.90%	5.40%
Minimum [Member] | Qualified Pension Plans [Member]
Weighted-average discount rate	5.10%	5.60%	6.10%
Maximum [Member] | Qualified Pension Plans [Member]
Weighted-average discount rate	5.20%	5.70%	6.30%
Pension Assets [Member]
Expected long-term rate of return on plan assets	8.50%	8.50%	8.50%
Non-Taxables [Member]
Expected long-term rate of return on plan assets	8.50%	7.75%	7.75%
Taxable [Member]
Expected long-term rate of return on plan assets	6.50%	5.50%	5.50%