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

No definition available.

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

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480237/815-40-50-5

+ Details

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

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	us-gaap_MaximumLengthOfTimeForeignCurrencyCashFlowHedge
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_CAD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_MXN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_JPY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_AUD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_USD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Derivatives and Risk Management - Cash Flow Hedges (Details) € in Millions, ¥ in Millions, £ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 30, 2023 EUR (€)	Dec. 30, 2023 USD ($)	Dec. 30, 2023 CAD ($)	Dec. 30, 2023 MXN ($)	Dec. 30, 2023 GBP (£)	Dec. 30, 2023 JPY (¥)	Dec. 30, 2023 AUD ($)
Derivative [Line Items]
Maximum period of future intercompany purchases	24 months
Percentage of forecasted purchases to manage fluctuations in global currencies (up to)	85.00%	85.00%	85.00%	85.00%	85.00%	85.00%	85.00%
Designated as cash flow hedges \| Forward contracts \| Euro
Derivative [Line Items]
Notional amount	€ 50.9	$ 56.3
Designated as cash flow hedges \| Forward contracts \| Canadian dollar
Derivative [Line Items]
Notional amount		19.0	$ 25.3
Designated as cash flow hedges \| Forward contracts \| Mexican peso
Derivative [Line Items]
Notional amount		6.8		$ 121.1
Designated as cash flow hedges \| Forward contracts \| British pound
Derivative [Line Items]
Notional amount		5.7			£ 4.5
Designated as cash flow hedges \| Forward contracts \| Japanese yen
Derivative [Line Items]
Notional amount		3.0				¥ 395.5
Designated as cash flow hedges \| Forward contracts \| Australian dollar
Derivative [Line Items]
Notional amount		2.5					$ 3.8
Designated as cash flow hedges \| Forward contracts \| U.S. dollar
Derivative [Line Items]
Notional amount		$ 3.5				¥ 480.0