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SEGMENT INFORMATION, Revenue by Major Market (Details) | 6 Months Ended
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Jun. 30, 2018 Market
SEGMENT INFORMATION [Abstract] |
Number of major markets | 3
Number of markets | 50

X
- Definition The number of major markets from which the entity generates revenue greater than 10% of consolidated total revenue. + References No definition available. + Details
Name: | nus_NumberOfMajorMarkets
Namespace Prefix: | nus_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of markets in which the entity sells and distributes its products through a global network of customers and sales leaders. + References No definition available. + Details
Name: | nus_NumberOfMarkets
Namespace Prefix: | nus_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration