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DERIVATIVES AND RISK MANAGEMENT - Cash Flow Hedges (Details)	6 Months Ended
	Jul. 01, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Foreign currency cash flow hedge maximum length of projection term	24 months
Forecasted purchases to manage fluctuations (as a percent) (up to)	85.00%

X

- Definition

Maximum percentage of cash flow hedge coverage as defined by policy.

+ References

No definition available.

+ Details

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Namespace Prefix:	fosl_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum period of time the entity is hedging its exposure to variability in future cash flows for forecasted transactions, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes forecasted transactions related to payment of variable interest on existing financial instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-SubTopic 30
-Topic 815
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480870/815-30-50-1

+ Details

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Namespace Prefix:	us-gaap_
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