Segment Information (Percentage Of Total Product Revenue Contributed By Company's Nutritional And Care Products) (Details)

v2.4.0.8

Segment Information (Percentage Of Total Product Revenue Contributed By Company's Nutritional And Care Products) (Details)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
USANA Nutritionals [Member]
Revenue from External Customer [Line Items]
Percentage of product revenue	80.00%	80.00%	79.00%
USANA Foods [Member]
Revenue from External Customer [Line Items]
Percentage of product revenue	11.00%	11.00%	11.00%
Sense - Beautiful Science [Member]
Revenue from External Customer [Line Items]
Percentage of product revenue	6.00%	7.00%	7.00%