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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2010 | Dec. 31, 2011
Related Party Transactions [Abstract] |  |
Number of affiliated entities the entity conducts business | 2 |
Total lease payments paid to affiliated entities | $ 3.6 |
Corporate office and warehouse space purchased from affiliated entities | 33.0 |
Cash paid for corporate office and warehouse space | $ 16.0 | $ 17.0

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- Definition Cash paid for corporate office and warehouse space from a related party. + References No definition available. + Details
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Namespace Prefix: | nus_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Number of affiliated entities the entity conducts business with. + References No definition available. + Details
Name: | nus_RelatedPartyTransactionNumberOfAffiliatedEntitiesEntityConductsBusiness
Namespace Prefix: | nus_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Corporate office and warehouse space purchased from affiliated entities. + References No definition available. + Details
Name: | nus_RelatedPartyTransactionsCorporateOfficeAndWarehouseSpacePurchasedFromAffiliatedEntities
Namespace Prefix: | nus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 57 -Paragraph 2 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration