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Income Taxes (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Effective income tax amount	$ 238,803	$ 220,385	$ 198,516
Effective income tax foreign tax rate differential	(102,316)	(111,989)	(100,010)
Income before income taxes	682,294	629,670	567,187
Income tax expense	(12,661)	118,856	110,960
Tax credit carryforward amount	8,413	5,012
Switzerland Corporate Tax Election	(180,034)
Non-U.S. Operations Entity's [Member]
Income before income taxes	461,436	453,729	403,242
Foreign Subsidiaries [Member]
Income tax expense	$ 20,287	$ 22,139	$ 21,085
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member]
Effective income tax rate	7.83%	7.83%	7.83%
Effective income tax foreign tax rate differential	$ 77,000	$ 55,000	$ 52,000
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member] | Maximum [Member]
Effective income tax amount	186,000	171,000	154,000
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member] | Minimum [Member]
Effective income tax amount	$ 53,600	$ 49,000	$ 44,000

X

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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