Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Components of Deferred Tax Assets and Liabilities [Abstract]
Pension	$ 23.5	$ 28.9
Operating lease liabilities	58.8	47.2
Postretirement benefits	16.1	16.0
Inventory	25.2	20.1
Payroll accruals	6.1	5.4
Computer software	3.7
Bad debt reserves	2.0	2.2
Other deferred tax assets	19.0	19.6
Subtotal	154.4	139.4
Less: valuation allowances	(1.1)	(0.8)
Deferred tax assets	153.3	138.6
Fixed assets	(50.6)	(41.4)
Operating lease right-of-use assets	(54.1)	(43.2)
Computer software		(0.8)
Other deferred tax liabilities	(23.0)	(22.3)
Deferred tax liabilities	(127.7)	(107.7)
Net deferred tax assets	25.6	30.9
Deferred Tax Assets, Net, Classification [Abstract]
Net deferred tax assets	25.6	30.9
Other Noncurrent Assets [Member]
Deferred Tax Assets, Net, Classification [Abstract]
Deferred tax assets, included in other non-current assets	28.1	33.6
Other Noncurrent Liabilities [Member]
Deferred Tax Assets, Net, Classification [Abstract]
Deferred tax liabilities included in other non-current liabilities	$ (2.5)	$ (2.7)