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Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012
Acquisitions [Abstract]
Cost of acquired entity	$ 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired	$ 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired	$ 12,562us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
NOX Technologies, Inc. [Member]
Acquisitions [Abstract]
Cost of acquired entity				$ 12,562us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = nus_NOXTechnologiesIncMember
NOX Technologies, Inc. [Member] | Patents [Member]
Acquisitions [Abstract]
Estimated remaining lives				8 years

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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