Pension And Postretirement Benefits (Schedule Of Amounts Recognized In Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Accrued pension and postretirement benefits	$ (298.4)	$ (244.0)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	64.8	60.7
Current liabilities	(1.4)	(1.3)
Accrued pension and postretirement benefits	(266.3)	(213.2)
Amounts recognized in the Consolidated Balance Sheets	(202.9)	(153.8)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	0.0	0.0
Current liabilities	(2.2)	(2.6)
Accrued pension and postretirement benefits	(26.8)	(26.4)
Amounts recognized in the Consolidated Balance Sheets	$ (29.0)	$ (29.0)