Pension And Other Benefit Programs (Schedule Of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	3.63%	4.12%
Benefit obligation rate of compensation increase	3.05%	3.10%
Net periodic benefit cost discount rate	4.12%	4.40%
Net periodic benefit cost expected return on plan assets	6.50%	6.75%
Net periodic benefit cost rate of compensation increase	3.10%	3.10%
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	1.50%	1.40%
Net periodic benefit cost discount rate	1.40%	2.00%
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	3.60%	4.10%
Net periodic benefit cost discount rate	4.11%	4.17%