Pension And Other Postretirement Benefits (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Pension Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	$ 4.0	$ 2.1
Non-current accrued benefit cost	140.8	159.1
Net amount recognized	144.8	161.2
Postretirement Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	6.8	6.6
Non-current accrued benefit cost	55.5	68.5
Net amount recognized	$ 62.3	$ 75.1