Pension and Postretirement Benefits (Schedule Of Amounts Recognized In Accumulated Other Comprehensive (Income) Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 400.0	$ 532.3
Prior service credit	(1.6)	(2.8)
Total recognized in accumulated other comprehensive loss	398.4	529.5
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(1.1)	(0.9)
Prior service credit	(3.1)	(4.1)
Total recognized in accumulated other comprehensive loss	$ (4.2)	$ (5.0)