Income Taxes (Schedule Of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Net operating losses	$ 32.2	$ 34.2
Postretirement benefits	13.1	16.7
Pension benefit liabilities	8.1	8.2
Deferred compensation	6.8	7.1
State tax credit carryforwards	4.4	4.7
Capital loss carryforwards	18.8	18.8
Capitalized research expenses	15.3	9.4
Lease liabilities	9.5	9.7
Other	9.0	3.8
Total deferred income tax assets	117.2	112.6
Valuation allowances	(49.1)	(48.7)
Net deferred income tax assets	68.1	63.9
Intangibles	(84.7)	(85.1)
Partnerships and investments	(25.4)	(25.5)
Accumulated depreciation	(87.3)	(86.4)
Prepaid pension costs	(21.6)	(21.2)
Inventories	(4.4)	(4.9)
Lease assets	(9.9)	(9.9)
Other	(1.7)	(0.3)
Total deferred income tax liabilities	(235.0)	(233.3)
Net deferred income tax liabilities	$ (166.9)	$ (169.4)