Retirement Plans (Schedule Of Amounts Recognized in Balance Sheet of Defined Benefit Plans) (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Other Noncurrent Assets	$ 4.1	$ 2.1
Accrued Compensation and Benefits	(6.6)	(4.4)
Pension and Other Post Retirement Benefits	(112.9)	(91.8)
Total	(115.4)	(94.1)
Net Actuarial Gain	35.6	21.2
Prior Service Cost	0.3	0.4
Total	$ 35.9	$ 21.6