Executive Deferred Compensation Plan (Details) (Executive [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Executive [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of matching contribution maximum (in hundredths)	10.00%
Percentage of compensation deferred, maximum (in hundredths)	80.00%
Percentage of bonus deferred, maximum (in hundredths)	100.00%
Compensation expense	$ 0.3	$ 3.1	$ 1.2
Compensation cost accrued related to executive deferred compensation plan	32.4	28.5
Investment in Rabbi Trust	$ 26.3	$ 23.2
Percentage vested after ten years of service (in hundredths)	50.00%
Number of years of service to attain fifty percent vesting	10 years
Percentage vested per year after ten years of service (in hundredths)	5.00%
Minimum age for automatic fully vesting (in years)	60

The minimum age for automatic fully vesting.

No definition available.

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Namespace Prefix:	nus_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of years of service with the company to attain fifty percent vesting.

+ References

No definition available.

+ Details

Name:	nus_NumberOfYearsOfServiceToAttainFiftyPercentVesting
Namespace Prefix:	nus_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum percentage of bonus pay that the participant is allowed to defer.

+ References

No definition available.

+ Details

Name:	nus_PercentageOfBonusDeferredMaximum
Namespace Prefix:	nus_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represent the maximum percentage of deferred compensation.

+ References

No definition available.

+ Details

Name:	nus_PercentageOfCompensationDeferredMaximum
Namespace Prefix:	nus_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represent percentage of matching contribution of participant salary.

+ References

No definition available.

+ Details

Name:	nus_PercentageOfMatchingContribution
Namespace Prefix:	nus_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represent the percentage vested after ten full years of service.

+ References

No definition available.

+ Details

Name:	nus_PercentageVestedAfterTenYearsOfService
Namespace Prefix:	nus_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represent the percentage vested per year after ten full years of service.

+ References

No definition available.

+ Details

Name:	nus_PercentageVestedPerYearAfterTenYearsOfService
Namespace Prefix:	nus_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(b))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 30

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 30

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant