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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 |  |  |  |  |

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