Commitments and Contingencies (Details) (Customs and Disputed Duties in Japan [Member]) In Millions, unless otherwise specified	Dec. 31, 2013 USD ($)	Dec. 31, 2013 JPY (¥)
Loss Contingencies [Line Items]
Aggregate amount additional assessments	$ 40.2	¥ 4,200.0

The aggregate amount of assessments and disputed duties, net of any recovery of consumption taxes.

No definition available.

Name:	nus_AggregateAmountOfAssessmentsAndDisputedDuties
Namespace Prefix:	nus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant