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Income Taxes (Details 3)	12 Months Ended
	Dec. 29, 2017
Switzerland [Member]
Income Tax Examination, Year under Examination	2016
Maximum [Member] | US Federal [Member]
Income Tax Examination, Year under Examination	2016
Maximum [Member] | California [Member]
Income Tax Examination, Year under Examination	2016
Maximum [Member] | Japan [Member]
Income Tax Examination, Year under Examination	2016
Minimum [Member] | US Federal [Member]
Income Tax Examination, Year under Examination	2014
Minimum [Member] | California [Member]
Income Tax Examination, Year under Examination	2013
Minimum [Member] | Switzerland [Member]
Income Tax Examination, Year under Examination	2015

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- Definition

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+ References

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