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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

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