Pension And Postretirement Benefits (Schedule Of Amounts Recognized In Accumulated Other Comprehensive (Income) Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 404.8	$ 372.3
Prior service cost (credit)	(5.5)	(10.0)
Amounts recognized in accumulated other comprehensive (income) loss total	399.3	362.3
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(4.2)	(2.1)
Prior service cost (credit)	(6.3)	0.0
Amounts recognized in accumulated other comprehensive (income) loss total	$ (10.5)	$ (2.1)