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Employee Benefit Plans - Deferred Compensation and Savings Plans (Details) - USD ($) | 12 Months Ended
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Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |  |  |
Employer's matching contributions under the plan | $ 2,100,000 | $ 2,500,000 | $ 2,600,000
Maximum additional contribution by employer (as a percent) | 15.00% |  |
Additional employer matching contributions | $ 0 | $ 0 | $ 0

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- Definition Deferred Contribution Plan, Additional Employer Matching Contributions + References No definition available. + Details
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Balance Type: | debit
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- Definition Represents the maximum percentage of employee gross pay, by the terms of the plan that the employer may additionally contribute to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | fosl_
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Balance Type: | na
Period Type: | duration

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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