Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 153.2us-gaap_CurrentFederalTaxExpenseBenefit	$ 121.4us-gaap_CurrentFederalTaxExpenseBenefit	$ 159.1us-gaap_CurrentFederalTaxExpenseBenefit
State	25.2	19.1	26.5
Foreign	9.8us-gaap_CurrentForeignTaxExpenseBenefit	10.0us-gaap_CurrentForeignTaxExpenseBenefit	12.7us-gaap_CurrentForeignTaxExpenseBenefit
Total	188.2us-gaap_CurrentIncomeTaxExpenseBenefit	150.5us-gaap_CurrentIncomeTaxExpenseBenefit	198.3us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	(18.7)	1.5	2.5
State	(2.2)	1.5	0.5
Foreign	2.7	0.1	(0.2)
Total	(18.2)us-gaap_DeferredIncomeTaxExpenseBenefit	3.1us-gaap_DeferredIncomeTaxExpenseBenefit	2.8us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax provision	170.0us-gaap_IncomeTaxExpenseBenefit	153.6us-gaap_IncomeTaxExpenseBenefit	201.1us-gaap_IncomeTaxExpenseBenefit
Components of U.S. and international income before income taxes
US	488.5	438.4	551.6
International	57.8	39.9	57.8
Income before income taxes	546.3	478.3	609.4
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)	2.60%	2.90%	2.90%
Foreign earnings taxes at lower rates	(1.90%)	(1.30%)	(1.30%)
Net effect of life insurance policies (as a percent)	(2.60%)	(3.20%)	(2.20%)
Net effect of changes in unrecognized tax benefits (as a percent)	0.20%	(0.50%)
Domestic production activity deduction (as a percent)	(1.70%)	(1.10%)	(1.20%)
Other, net (as a percent)	(0.50%)	0.30%	(0.20%)
Effective tax rate (as a percent)	31.10%	32.10%	33.00%
Deferred tax assets:
Accrued expenses not currently deductible for tax	85.0	77.7
Inventory costs capitalized for tax purposes	32.3us-gaap_DeferredTaxAssetsInventory	28.4us-gaap_DeferredTaxAssetsInventory
Share-based compensation	18.5	19.5
Allowance for doubtful accounts	6.6	6.9
Tax credit carryforwards	1.1	1.3
Net operating loss carryforwards	2.4	10.2
Other		1.9us-gaap_DeferredTaxAssetsOther
Total deferred tax assets	145.9us-gaap_DeferredTaxAssetsGross	145.9us-gaap_DeferredTaxAssetsGross
Deferred tax liabilities:
Property, plant and equipment, net	(258.0)	(257.6)
Goodwill and other intangible assets	(474.6)	(465.2)
LIFO inventories	(36.3)	(49.2)
Deferred income	(19.6)	(25.8)
Other	(3.9)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	(792.4)us-gaap_DeferredTaxLiabilities	(797.8)us-gaap_DeferredTaxLiabilities
Net deferred tax liabilities	$ (646.5)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (651.9)us-gaap_DeferredTaxAssetsLiabilitiesNet

The amount as of the balance sheet date of the estimated future tax effects attributable to inventory-related costs as per LIFO method in conformity with generally accepted accounting principles, which will reverse in future periods when inventory is sold.

No definition available.