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Significant Accounting Policies (Concentration of Risk) (Details)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Watches | Production | Production concentration
Concentration of Risk
Concentration risk percentage	47.00%
Licensed products | Sales of licensed products | Licensed products
Concentration of Risk
Concentration risk percentage	45.70%	46.60%	47.00%
MICHAEL KORS | Sales of licensed products | Licensed products
Concentration of Risk
Concentration risk percentage	19.20%	22.60%	22.60%
ARMANI | Sales of licensed products | Licensed products
Concentration of Risk
Concentration risk percentage	15.20%	12.00%	9.70%

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