Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)	Jun. 09, 2015 EUR (€)
Significant Accounting Policies [Line Items]
Cash and cash equivalents		$ 134,785	$ 119,050
Advertising and promotion expenses		130,207	116,854	$ 119,560
Co-op advertising expenses		$ 11,418	13,332	10,891
Minimum eligible service period (days)		60 days
Employer matching contribution, percent of match		50.00%
Maximum percentage of employee salary company matches at disclosed ratio		6.00%
Employee contributions		$ 57,354	55,796	53,544
Employer contributions to employee benefit plan		23,008	22,689	22,039
Projected benefit obligation		73,510	63,569
Projected plan assets		60,040	54,315
Funded status of plan		13,470	9,254
Purchases of short-term investments		581,500	664,133	83,904
Right-of-use asset		323,003
Lease liability		330,100
Accumulated other comprehensive income (loss)
Significant Accounting Policies [Line Items]
Funded status of plan		8,303	5,092
Other noncurrent liabilities
Significant Accounting Policies [Line Items]
Funded status of plan		5,167	4,162
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		12,049	27,948	74,112
Change in U.S. dollar value of euro denominated debt, net of tax		$ 9,153	20,376	$ 46,320
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)		15 years
Minimum | Machinery and equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (years)		3 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)		25 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		$ 110,033	88,100
Accounting Standards Update 2016-02
Significant Accounting Policies [Line Items]
Right-of-use asset					$ 328,169
Lease liability					$ 332,286
MAS
Significant Accounting Policies [Line Items]
Purchases of short-term investments		$ 42,500	$ 53,000
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