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Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Supplemental Cash Flow Information [Abstract] |  |  |
Cash paid for interest | $ 5.3 us-gaap_InterestPaid | $ 4.8 us-gaap_InterestPaid | $ 5.1 us-gaap_InterestPaid
Cash paid for income taxes | 171.4 us-gaap_IncomeTaxesPaidNet | 130.1 us-gaap_IncomeTaxesPaidNet | 95.2 us-gaap_IncomeTaxesPaidNet
Non-cash item in deferred tax liabilities and intangibles in conjunction with acquisition |  | 7.0 nus_OtherSignificantNoncashTransactionValueOfConsiderationNonCashItemInDeferredTaxLiabilitiesAndIntangiblesInConjunctionWithAcquisition |
Non-cash addition of fixed assets |  | 9.2 us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1 | 5.5 us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1
Noncash charges to fixed assets associated with Korea building lease | 19.4 nus_NoncashChargesToFixedAssetsAssociatedWithAccountingForBuildingLease |  |
Noncash increase of long term liabilities | 16.7 nus_NoncashChargesToFixedAssetsAssociatedWithLongTermLiabilities |  |
Noncash decrease of long term assets | $ (2.7)nus_NoncashChargesToFixedAssetsAssociatedWithLongTermAssets |  |

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- Definition Non-cash charges to fixed assets associated with the accounting of the Company's Korea building lease. + References No definition available. + Details
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- Definition Sum of the carrying non-cash amounts of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. + References No definition available. + Details
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- Definition Aggregated non-cash obligations, excluding long-term debt, incurred as part of the normal operations that are expected to be paid after one year or beyond the normal operating cycle, if longer. + References No definition available. + Details
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- Definition The value of the noncash (or part noncash) consideration received in a transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of a transaction not resulting in cash receipts or cash payments in the period. + References No definition available. + Details
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- Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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- Definition The amount of cash paid for interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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