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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Current:      
Federal $ 153.1 $ 40.3 $ (13.5)
State 22.1 12.2 2.9
Foreign 14.4 3.4 (1.1)
Total 189.6 55.9 (11.7)
Deferred:      
Federal (24.1) 34.0 60.0
State (2.3) 7.9 (3.1)
Foreign (0.8) 0.8 1.1
Total (27.2) 42.7 58.0
Income tax provision 162.4 98.6 46.3
Components of U.S. and international income (loss) before income taxes      
US 452.0 275.8 201.7
International 59.6 20.7 (6.2)
Income before income taxes 511.6 296.5 195.5
Reconciliation of income tax at the U.S. federal statutory tax rates to income tax expense      
Income tax at U.S. federal statutory tax rate (as a percent) 35.00% 35.00% 35.00%
State income tax, net of federal tax effect (as a percent) 2.40% 3.90% (0.60%)
Net effect of life insurance policies (as a percent) (2.30%) (2.60%) (6.30%)
Net effect of changes in unrecognized tax benefits (as a percent)   (0.10%) (5.80%)
Domestic production activity deduction (as a percent) (1.50%) (1.20%)  
Other, net (as a percent) (1.90%) (1.70%) 1.40%
Effective tax rate (as a percent) 31.70% 33.30% 23.70%
Deferred tax assets:      
Accrued expenses not currently deductible for tax 45.7 35.8  
Inventory costs capitalized for tax purposes 24.7 13.0  
Allowance for doubtful accounts 9.3 7.5  
Tax credit carryovers 1.1 1.1  
Net operating loss carryforwards 3.1 3.2  
Other 24.1 14.5  
Total deferred tax assets 108.0 75.1  
Deferred tax liabilities:      
Property, plant and equipment, net (154.1) (134.8)  
Goodwill and other intangible assets (342.9) (284.7)  
LIFO inventories (17.5) (36.9)  
Other   (0.9)  
Total deferred tax liabilities (514.5) (457.3)  
Net deferred tax liabilities $ (406.5) $ (382.2)