Income Taxes (Schedule Of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Net operating losses	$ 34.2	$ 42.5
Postretirement benefits	16.7	20.7
Pension benefit liabilities	8.2	11.0
Deferred compensation	7.1	7.9
Foreign tax credit carryforwards	0.0	0.6
State tax credit carryforwards	4.7	8.7
Capital loss carryforwards	18.8	18.8
Capitalized research expenses	9.4	0.0
Lease right-of-use liabilities	9.7	9.8
Other	3.8	12.3
Total deferred income tax assets	112.6	132.3
Valuation allowances	(48.7)	(60.6)
Net deferred income tax assets	63.9	71.7
Intangibles	(85.1)	(87.4)
Partnerships and investments	(25.5)	(26.4)
Accumulated depreciation	(86.4)	(80.4)
Prepaid pension costs	(21.2)	(27.8)
Inventories	(4.9)	(4.9)
Lease right-of-use assets	(9.9)	(10.1)
Other	(0.3)	(1.6)
Total deferred income tax liabilities	(233.3)	(238.6)
Net deferred income tax liabilities	$ (169.4)	$ (166.9)