Pension And Postretirement Benefits (Schedule Of Information For Pension Plans With An Accumulated Benefit Obligation In Excess Of Plan Assets) (Details) - Pension Benefits [Member] - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 695.2	$ 860.0
Accumulated benefit obligation	687.1	852.2
Fair value of plan assets	$ 480.7	$ 627.3