Employee Benefits And Deferred Compensation Plans (Schedule Of Weighted Average Asset Allocation) (Details) - Pension Benefits [Member]	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Weighted average plan asset allocations	100.00%	100.00%
Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average plan asset allocations	35.39%	35.29%
Fixed Income Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average plan asset allocations	62.05%	63.70%
Cash/Short-Term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average plan asset allocations	2.56%	1.01%