Shareholders' Equity (Schedule Of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Foreign currency translation adjustments, Pre-tax Amount	$ (1.8)		$ (7.1)
Derivative gain (loss), net, pre-tax amount	24.9	$ 13.4	(14.2)
Pension and postretirement adjustments, Pre-tax Amount	(9.6)	(13.4)	382.9
Total other comprehensive income (loss), Pre-tax Amount	13.5	0.0	361.6
Derivative gain (loss), net, Tax (Expense) Benefit	(6.3)	(3.5)	3.7
Pension and postretirement adjustments, Tax (Expense) Benefit	2.3	3.2	(98.5)
Total other comprehensive income (loss), Tax (Expense) Benefit	(4.0)	(0.3)	(94.8)
Foreign currency translation adjustments, After-tax Amount	(1.8)	0.0	(7.1)
Derivative gain (loss), net, After-tax Amount	18.6	9.9	(10.5)
Pension and postretirement adjustments, after-tax amount	(7.3)	(10.2)	284.4
Total other comprehensive income (loss)	$ 9.5	$ (0.3)	$ 266.8