Leases (Schedule Of Lease Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost	$ 43.8	$ 38.4	$ 37.9
Amortization of right-of-use assets	1.9	2.0	2.1
Interest on lease liabilities	0.4	0.5	0.6
Total finance lease cost	2.3	2.5	2.7
Variable lease cost	12.4	10.5	10.6
Total lease cost	$ 58.5	$ 51.4	$ 51.2