Pension And Postretirement Benefits (Schedule Of Pension Plan Target Allocations And Weighted-Average Asset Allocations By Asset Category) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlantargetallocationrange	35%-75%
Actual asset allocation, percentage	39.00%	47.00%
Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlantargetallocationrange	20%-50%
Actual asset allocation, percentage	24.00%	23.00%
Alternative assets/Other [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlantargetallocationrange	0%-35%
Actual asset allocation, percentage	32.00%	29.00%
Money market [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlantargetallocationrange	0%-10%
Actual asset allocation, percentage	5.00%	1.00%