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Fair Value Measures (Narrative) (Details) (USD $)
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Apr. 04, 2015
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Jan. 03, 2015
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| Fair Value Measures [Abstract] | ||
| Transfers of financial assets or liabilities | $ 0usna_FairValueAssetsAndLiabilitiesLevel1BetweenLevel2TransfersAmount | $ 0usna_FairValueAssetsAndLiabilitiesLevel1BetweenLevel2TransfersAmount |
| Non-financial assets | $ 0usna_NonfinancialAssetsFairValueDisclosure | $ 0usna_NonfinancialAssetsFairValueDisclosure |
| X | ||||||||||
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- Details
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- Definition
Fair Value, Assets And Liabilities, Level 1 Between Level 2 Transfers, Amount No definition available.
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| X | ||||||||||
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- Definition
Nonfinancial Assets Fair Value Disclosure No definition available.
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