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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 29, 2018 | Jun. 30, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Income Taxes [Abstract] |  |  |  |  |  |
Increase in liabilities for unrecognized tax benefits |  |  |  | $ 3,486 |  |
TCJA income tax expense Abstract [Abstract] |  |  |  |  |  |
TCJA tax on unremitted foreign earnings | $ 6,214 |  |  |  |  | $ 215,558
TCJA foreign taxes on assumed repatriation |  |  |  | 19,282 |  | 213,000
Expected TCJA tax payment, net | 184,468 |  |  | 184,468 |  |
Additional expected repatriation | 1,200,000 |  |  |  |  | $ 1,100,000
Cash repatriated during the current period | 450,000 | $ 274,000 |  |  |  |
Repatriation taxes paid | 64,674 | 92,093 |  |  |  |
TCJA transition taxes paid |  | 14,400 |  |  |  |
Future cash repatriation [Abstract] |  |  |  |  |  |
Future cash repatriation following next fiscal quarter | 300,000 |  |  | 300,000 |  |
Remeasurement of repatriation deferred tax liability [Member] |  |  |  |  |  |
Effect on Income Tax Expense (Benefit) [Line Items] |  |  |  |  |  |
Deferred Other Tax Expense (Benefit) | $ 680 |  | $ 892 | $ (7,010) | $ 3,100 |
Remeasurement of deferred tax liability debt extinguishment [Member] |  |  |  |  |  |
Effect on Income Tax Expense (Benefit) [Line Items] |  |  |  |  |  |
Deferred Other Tax Expense (Benefit) |  | $ (33,963) |  |  |  |

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