Significant Accounting Policies - Inventories (Details) - USD ($) $ in Millions	Dec. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consigned inventory	$ 19.8	$ 25.3

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.

No definition available.

Name:	fosl_InventoryMaterialsSuppliesAndMerchandiseUnderConsignmentNetOfReserves
Namespace Prefix:	fosl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant