Pension And Other Postretirement Benefits (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	$ 2.1	$ 1.9
Non-current accrued benefit cost	164.6	118.6
Net amount recognized	166.7	120.5
Postretirement Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	6.8	5.8
Non-current accrued benefit cost	69.4	66.7
Net amount recognized	$ 76.2	$ 72.5