Pension And Other Postretirement Benefits (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	$ 2.1	$ 1.9
Non-current accrued benefit cost	159.1	197.9
Net amount recognized	161.2	199.8
Postretirement Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	6.6	6.8
Non-current accrued benefit cost	68.5	74.1
Net amount recognized	$ 75.1	$ 80.9