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FINANCIAL STATEMENT POLICIES - Narrative (Details)	3 Months Ended
	Jul. 04, 2020
COVID-19
Unusual or Infrequent Item, or Both [Line Items]
Percent reduction in cash fees	20.00%

X

- Definition

Reduction in Cash Fees, Percent

+ References

No definition available.

+ Details

Name:	fosl_ReductionInCashFeesPercent
Namespace Prefix:	fosl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_UnusualOrInfrequentItemAxis=fosl_COVID19Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: