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Significant Accounting Policies (Inventories) (Details) - USD ($) $ in Millions | Dec. 29, 2018 | Dec. 30, 2017
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Consigned inventory | $ 43.7 | $ 54.5

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- Definition Represents the carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of inventory owned by the entity but in the hands of a customer, typically a reseller. + References No definition available. + Details
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Namespace Prefix: | fosl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration