Employee Benefit Plans (Schedule Of Allocation Of Plan Assets) (Details)	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total	60.00%	53.00%
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total	20.00%	23.00%
Stable value funds
Defined Benefit Plan Disclosure [Line Items]
Total	15.00%	16.00%
Other, including cash
Defined Benefit Plan Disclosure [Line Items]
Total	5.00%	8.00%