Income Taxes - Summary of Income Tax Examinations (Details)	12 Months Ended
	Jan. 03, 2020
SWITZERLAND
Income Taxes [Line Items]
Income Tax Examination, Year under Examination	2018
Minimum | US Federal
Income Taxes [Line Items]
Income Tax Examination, Year under Examination	2016
Minimum | California
Income Taxes [Line Items]
Income Tax Examination, Year under Examination	2015
Minimum | JAPAN
Income Taxes [Line Items]
Income Tax Examination, Year under Examination	2017
Maximum | US Federal
Income Taxes [Line Items]
Income Tax Examination, Year under Examination	2018
Maximum | California
Income Taxes [Line Items]
Income Tax Examination, Year under Examination	2018
Maximum | JAPAN
Income Taxes [Line Items]
Income Tax Examination, Year under Examination	2018