Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jan. 01, 2019 USD ($)	Jun. 09, 2015 EUR (€)
Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 84,884	$ 119,050	$ 84,884	$ 121,665	$ 81,692
Advertising and promotion expenses		116,854	119,560	122,148
Co-op advertising expenses		$ 13,332	10,891	11,132
Minimum eligible service period (days)		90 days
Employer matching contribution, percent of match		50.00%
Maximum percentage of employee salary company matches at disclosed ratio		6.00%
Employee contributions		$ 55,796	53,544	50,542
Employer contributions to employee benefit plan		22,689	22,039	21,002
Projected benefit obligation	65,439	63,569	65,439
Projected plan assets	53,404	54,315	53,404
Funded status of plan	12,035	9,254	12,035
Purchases of short-term investments		664,133	83,904	0
Net cash provided by operating activities		1,181,344	1,193,595	1,345,289
Accumulated other comprehensive income (loss)
Significant Accounting Policies [Line Items]
Funded status of plan	6,187	5,092	6,187
Other noncurrent liabilities
Significant Accounting Policies [Line Items]
Funded status of plan	5,848	4,162	5,848
2.00% senior notes, payable January 14, 2022; interest payable annually
Significant Accounting Policies [Line Items]
Aggregate principal amount of debts | €							€ 500,000,000
Interest rate percentage							2.00%
Change in U.S. dollar value of euro denominated debt		(27,948)	74,112	(20,644)
Change in U.S. dollar value of euro denominated debt, net of tax		$ (20,376)	46,320	(12,902)
Minimum
Significant Accounting Policies [Line Items]
Finite intangible assets useful life, minimum (years)		7 years
Minimum | Buildings and improvements
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (years)		25 years
Minimum | Machinery and equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (years)		5 years
Minimum | Furniture and fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (years)		3 years
Maximum
Significant Accounting Policies [Line Items]
Finite intangible assets useful life, minimum (years)		16 years
Maximum | Buildings and improvements
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (years)		40 years
Maximum | Machinery and equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (years)		15 years
Maximum | Furniture and fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (years)		7 years
Non-US
Significant Accounting Policies [Line Items]
Cash and cash equivalents	70,520	$ 88,100	70,520
Accounting Standards Update 2016-09, Statutory Tax Withholding Component
Significant Accounting Policies [Line Items]
Net cash provided by operating activities				13,039	11,589
Accounting Standards Update 2016-09, Excess Tax Benefit Component
Significant Accounting Policies [Line Items]
Net cash provided by operating activities				$ 4,697	$ 5,690
MAS
Significant Accounting Policies [Line Items]
Purchases of short-term investments		$ 53,000	$ 83,904
MAS | Formation Of Wholly Owned Captive Insurance Company
Significant Accounting Policies [Line Items]
Initial cash contribution	16,876
Contribution for net present value of insurance premiums	$ 67,391
Forecast | Accounting Standards Update 2016-02 | Minimum
Significant Accounting Policies [Line Items]
Lease liability						$ 300,000
Right-of-use asset						300,000
Forecast | Accounting Standards Update 2016-02 | Maximum
Significant Accounting Policies [Line Items]
Lease liability						350,000
Right-of-use asset						$ 350,000