Employee Benefit Plans (Principal Assumptions In Developing Net Periodic Pension Cost) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	3.40%	3.70%
Expected return on plan assets (as a percent)	6.80%	6.80%
Rate of compensation increase (as a percent)	4.70%	4.60%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	3.70%	3.90%