Employee Benefit Plans and Other Postretirement Benefits (Schedule Of Pension Plans With PBO And ABO In Excess Of Fair value Of Plan Assets) (Details) - Pension and SERPA Benefits - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 1,900.0	$ 2,100.0
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
PBO	1,984.7	58.0
Fair value of plan assets	1,874.6	0.0
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
ABO	40.1	42.1
Fair value of plan assets	$ 0.0	$ 0.0