Retirement Benefits (Schedule Of Defined Benefit Plan Weighted Average Assumption Used In Calculating Net Periodic Benefit Cost) (Details)		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016
Pension Benefits
Weighted average assumptions:
Expected return on plan assets		6.64%	7.07%
Discount rate		3.40%	4.11%
Rate of compensation increase	[1]	1.77%	2.44%
Postretirement Benefits
Weighted average assumptions:
Expected return on plan assets		0.00%	0.00%
Discount rate		3.64%	4.12%
Rate of compensation increase	[1]	0.00%	0.00%

[1] *The 2017 assumption does not include a rate of compensation increase for the U.S. defined benefit plans since future benefit accruals were discontinued for those plans after December 31, 2016.