Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of LIFO inventory	71.00%
Capitalized Computer Software, Net [Abstract]
Capitalized computer software costs, net of amortization	$ 15,700,000	$ 15,600,000
Amortization expense	$ 5,600,000	5,200,000	$ 4,600,000
Goodwill Annual Impairment Test [Abstract]
Gross value of definite-lived intangible assets following accelerated amortization method (as a percentage)	60.00%
Impairment of intangible assets, finite-lived	$ 0	0	0
Impairment of intangible assets, indefinite-lived (excluding goodwill)	$ 0	$ 0	$ 0
Research and development expense as a percentage of cost of goods sold	3.00%	2.00%	2.00%
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating income	$ 503,700,000	$ 477,800,000	$ 474,600,000
Other expense, net	(6,500,000)	(4,500,000)	$ (25,500,000)
Pro Forma | Accounting Standards Update 2017-07
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating income	15,000,000	12,000,000
Other expense, net	0	$ 0
Pro Forma | Accounting Standards Update 2016-02
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Lease, right-of-use asset (less than)	$ 100,000,000
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer returns as a percentage of gross sales	1.00%
Goodwill Annual Impairment Test [Abstract]
Useful life, intangible assets	5 years
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer returns as a percentage of gross sales	2.00%
Goodwill Annual Impairment Test [Abstract]
Useful life, intangible assets	30 years
Capitalized Computer Software Costs
Capitalized Computer Software, Net [Abstract]
Depreciable lives	5 years