Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Actuarial Assumptions Used In Determining Pension And Other Postretirement Benefit Obligation) (Details) - Pension Postretirement Benefit Obligations And Other Postretirement Accumulated Postretirement Benefit Obligations [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Weighted-average rate of increase in future compensation levels	4.23%	4.23%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.75%	4.75%
Pre-65 Retirees [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed health care cost trend rate	6.75%	7.10%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2024	2023
Post - 65 Retirees [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed health care cost trend rate	7.55%	7.70%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2024	2023
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Blended weighted-average discount rate	4.67%	4.27%
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	4.60%	4.23%
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	3.84%	3.61%
Minimum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	4.51%	4.03%
Maximum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate	4.79%	4.40%