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Employee Benefit Plans (Principal Assumptions In Developing Year-End Actuarial Present Value Of The Projected Benefit Obligation) (Details)
Dec. 31, 2015
Dec. 31, 2014
Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate (as a percent) 4.00% 3.50%
Rate of compensation increase (as a percent) 4.70% 3.80%
Other Postretirement Benefit Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate (as a percent) 4.00% 3.80%