Retirement Plans And Postretirement Benefits (Net Postretirement Benefit Costs And Postretirement Projected Benefit Obligation) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.10%	4.82%
Health care cost trend on covered charges, Initial	6.67%	6.55%
Health care cost trend on covered charges, Ultimate	6.48%	6.18%
Health care cost trend on covered charges, Years to ultimate	2 years	1 year
Postretirement Benefit Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.91%	5.29%
Health care cost trend on covered charges, Initial	6.55%	7.39%
Health care cost trend on covered charges, Ultimate	6.18%	6.18%
Health care cost trend on covered charges, Years to ultimate	0 years	2 years