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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current:      
Federal $ 121.4 $ 159.1 $ 153.1
State 19.1 26.5 22.1
Foreign 10.0 12.7 14.4
Total 150.5 198.3 189.6
Deferred:      
Federal 1.5 2.5 (24.1)
State 1.5 0.5 (2.3)
Foreign 0.1 (0.2) (0.8)
Total 3.1 2.8 (27.2)
Income tax provision 153.6 201.1 162.4
Components of U.S. and international income before income taxes      
US 438.4 551.6 452.0
International 39.9 57.8 59.6
Income before income taxes 478.3 609.4 511.6
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) 2.90% 2.90% 2.40%
Net effect of life insurance policies (as a percent) (3.20%) (2.20%) (2.30%)
Net effect of changes in unrecognized tax benefits (as a percent) (0.50%)    
Domestic production activity deduction (as a percent) (1.10%) (1.20%) (1.50%)
Other, net (as a percent) (1.00%) (1.50%) (1.90%)
Effective tax rate (as a percent) 32.10% 33.00% 31.70%
Deferred tax assets:      
Accrued expenses not currently deductible for tax 77.7 66.9  
Inventory costs capitalized for tax purposes 28.4 25.8  
Share-based compensation 19.5 21.1  
Allowance for doubtful accounts 6.9 7.8  
Tax credit carryforwards 1.3 1.1  
Net operating loss carryforwards 10.2 3.4  
Other 1.9 3.5  
Total deferred tax assets 145.9 129.6  
Deferred tax liabilities:      
Property, plant and equipment, net (257.6) (165.9)  
Goodwill and other intangible assets (465.2) (360.9)  
LIFO inventories (49.2) (38.6)  
Deferred income (25.8)    
Total deferred tax liabilities (797.8) (565.4)  
Net deferred tax liabilities $ (651.9) $ (435.8)