Significant Accounting Policies - Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Allowance for doubtful accounts receivable	$ 12.6	$ 14.6

Valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible and valuation allowance for the amount of products sold that the entity expects to be returned by the purchaser.

No definition available.

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