Income Taxes - Summary, Reconciliation and Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 136.3	$ 150.6	$ 117.8
State	37.9	47.6	21.5
Foreign	16.5	19.7	16.1
Total	190.7	217.9	155.4
Deferred:
Federal	26.9	(6.0)	(202.8)
State	7.2	(2.3)	11.1
Foreign	(1.6)	(0.8)	(0.9)
Total	32.5	(9.1)	(192.6)
Income tax provision	223.2	208.8	(37.2)
Components of U.S. and international income before income taxes
US	877.4	775.2	524.6
International	51.9	75.4	59.2
Income before income taxes	$ 929.3	$ 850.6	$ 583.8
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)	21.00%	21.00%	35.00%
Tax Reform (as a percent)		0.40%	(35.50%)
State income tax, net of federal tax effect (as a percent)	3.60%	3.60%	3.80%
Foreign earnings taxed at higher (lower) rates (as a percent)	0.40%	0.40%	(0.70%)
Net effect of life insurance policies (as a percent)	(1.50%)	(1.50%)	(3.60%)
Net effect of changes in unrecognized tax benefits (as a percent)		(0.20%)	(0.20%)
Stock-based compensation (as a percent)	0.70%	0.60%	(0.20%)
Domestic production activity deduction (as a percent)			(1.60%)
Loss on sale of assets (as a percent)			(0.80%)
Other, net (as a percent)	(0.20%)	0.20%	(2.60%)
Effective tax rate (as a percent)	24.00%	24.50%	(6.40%)
Deferred tax assets:
Accrued expenses not currently deductible for tax	$ 31.6	$ 26.0
Inventory costs capitalized for tax purposes	13.1	27.1
Share-based compensation	8.2	7.2
Allowance for doubtful accounts	4.9	5.4
Tax credits carryforwards	1.4	1.0
Net operating loss carryforwards	4.2	6.0
Total deferred tax assets	63.4	72.7
Deferred tax liabilities:
Property, plant and equipment, net	(189.1)	(175.4)
Goodwill and other intangible assets	(311.6)	(308.8)
LIFO inventories	(23.2)	(21.1)
Other	(8.8)	(7.5)
Total deferred tax liabilities	(532.7)	(512.8)
Net deferred tax liabilities	(469.3)	(440.1)
Tax Cuts and Jobs Act of 2017
Effect of tax rate changes on deferred tax assets and liabilities			$ 216.7
One time transition tax			9.4
Tax benefit, net			$ 207.3
Completed tax benefit, net		$ 3.2
State
Income Taxes
Operating Loss Carryforwards	$ 4.1