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Income Taxes (Summary Of Temporary Differences That Give Rise To Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Deferred income tax assets (liabilities): |  |
Inventory costing and valuation methods | $ 3.6 | $ 4.8
Allowance for doubtful accounts | 3.0 | 4.3
Insurance reserves | 8.4 | 11.5
Promotions payable | 1.3 | 1.7
Stock-based compensation | 5.2 | 6.8
Federal and state benefit of uncertain tax positions | 0.9 | 1.9
Foreign net operating loss and credit carryforwards | 4.2 | 5.1
Foreign valuation allowances | (2.8) | (4.0)
Other, net | 0.8 | 2.1
Total deferred income tax assets | 24.6 | 34.2
Property and equipment | (75.2) | (114.8)
Total deferred income tax liabilities | (75.2) | (114.8)
Deferred income tax liabilities | $ (50.6) | $ (80.6)

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