Postretirement Plans (Schedule Of Assumptions Used To Calculate The Benefit Obligation) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	7.00%	7.00%	7.50%
Rate of compensation increase	4.00%	3.80%	4.00%
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.20%	3.90%	4.80%
Other Postretirement Benefits Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.80%	3.50%	4.20%