Pension And Other Benefit Programs (Schedule Of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	3.16%	4.30%
Benefit obligation rate of compensation increase	3.05%	3.05%
Net periodic benefit cost discount rate	4.28%	3.62%
Net periodic benefit cost expected return on plan assets	5.75%	6.50%
Net periodic benefit cost rate of compensation increase	3.05%	3.05%
U.S. Defined-Benefit Retiree Health And Life Insurance Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	3.14%	4.31%
Net periodic benefit cost discount rate	4.31%	3.60%