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, 2014	Dec. 31, 2013	Dec. 31, 2012
Weighted-average rate of increase in future compensation levels	4.23%	4.23%	4.23%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.75%	4.75%
Pre-65 Retirees [Member]
Assumed health care cost trend rate		7.50%	7.75%
Post - 65 Retirees [Member]
Assumed health care cost trend rate		7.25%	7.50%
Qualified Pension Plans [Member]
Blended weighted-average discount rate	5.14%	4.36%	5.11%
Other Postretirement [Member]
Weighted-average discount rate	5.05%	4.36%	5.10%
Non-Qualified Pension Plans [Member]
Weighted-average discount rate	4.29%	3.37%	4.40%
Minimum [Member] | Qualified Pension Plans [Member]
Weighted-average discount rate	5.04%	4.31%	5.10%
Maximum [Member] | Qualified Pension Plans [Member]
Weighted-average discount rate	5.26%	4.50%	5.20%
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	8.30%	8.50%	8.50%
Taxable [Member]
Expected long-term rate of return on plan assets	6.50%	6.50%	6.50%