Pension And Other Benefit Programs (Schedule Of Periodic Benefit (Credit) Costs for U.S. Defined Benefit Pension Plans) (Details) - U.S. Pension Plans [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost of benefits earned during the period	$ 4.8	$ 5.7	$ 8.6
Interest cost on projected benefit obligation	50.3	46.1	48.1
Expected return on plan assets	(80.1)	(95.9)	(98.7)
Amortization of prior service (credit) cost			1.5
Amortization of net actuarial (gain) loss	19.2	20.0	17.5
Partial settlement			20.8
Net periodic pension (credit) cost	$ (5.8)	$ (24.1)	$ (2.2)