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

No definition available.

Name:	fosl_CashFlowHedgeCoveragePercentage
Namespace Prefix:	fosl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the applicable margin added to the variable rate of the debt instrument which varies based upon the Company's consolidated leverage ratio (the "Ratio").

+ References

No definition available.

+ Details

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

- Definition

Represents the consolidated leverage ratio used to calculate the variable rate of the debt instrument.

+ References

No definition available.

+ Details

Name:	fosl_DebtInstrumentConsolidatedLeverageRatioUsedToCalculateVariableRateOfDebt
Namespace Prefix:	fosl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-Subparagraph (a)(1),(2)
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

+ Details

Name:	us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

+ Details

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

- Definition

Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1377-109256

+ Details

Name:	us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- 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:	us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_CAD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_JPY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_MXN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_AUD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_USD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	fosl_DebtInstrumentConsolidatedLeverageRatioAxis=fosl_DebtInstrumentConsolidatedLeverageRatioLessThan1.0to1.0Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	fosl_DebtInstrumentConsolidatedLeverageRatioAxis=fosl_DebtInstrumentConsolidatedLeverageRatioGreaterThanOrEqualTo2.0to1.0Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis=us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DERIVATIVES AND RISK MANAGEMENT (Cash Flow Hedges) (Details) € in Millions, ¥ in Millions, £ in Millions, MXN in Millions, CAD in Millions, AUD in Millions		3 Months Ended		9 Months Ended
	Jul. 26, 2013	Oct. 01, 2016 USD ($)	Oct. 03, 2015 USD ($)	Oct. 01, 2016 USD ($)	Oct. 03, 2015 USD ($)	Oct. 01, 2016 EUR (€)	Oct. 01, 2016 USD ($)	Oct. 01, 2016 GBP (£)	Oct. 01, 2016 AUD	Oct. 01, 2016 MXN	Oct. 01, 2016 CAD	Oct. 01, 2016 JPY (¥)	Mar. 09, 2015 USD ($)
Derivative [Line Items]
Foreign currency cash flow hedge maximum length of projection term				24 months
Forecasted purchases to manage fluctuations (up to) (as a percent)						85.00%	85.00%	85.00%	85.00%	85.00%	85.00%	85.00%
Hedges resulted in ineffectiveness		$ 0	$ 0	$ 0	$ 0
Gain (loss) reclassified into earnings		17,356,000	57,534,000	$ 29,170,000	150,252,000
U.S. term loan
Derivative [Line Items]
Maximum borrowing capacity													$ 231,300,000
Designated as cash flow hedges \| Forward Contracts \| Euro
Derivative [Line Items]
Notional amount						€ 255.8	$ 290,600,000
Designated as cash flow hedges \| Forward Contracts \| British pound
Derivative [Line Items]
Notional amount							77,000,000	£ 52.9
Designated as cash flow hedges \| Forward Contracts \| Canadian dollar
Derivative [Line Items]
Notional amount							64,100,000				CAD 84.2
Designated as cash flow hedges \| Forward Contracts \| Japanese yen
Derivative [Line Items]
Notional amount							38,600,000					¥ 4,234.3
Designated as cash flow hedges \| Forward Contracts \| Mexican peso
Derivative [Line Items]
Notional amount							18,000,000			MXN 339.8
Designated as cash flow hedges \| Forward Contracts \| Australian dollar
Derivative [Line Items]
Notional amount							16,600,000		AUD 22.2
Designated as cash flow hedges \| Forward Contracts \| U.S. dollar
Derivative [Line Items]
Notional amount							$ 41,300,000					¥ 4,250.0
Designated as cash flow hedges \| Interest Rate Swaps
Derivative [Line Items]
Derivative, term of contract	5 years
Fixed interest rate (as a percent)						1.288%	1.288%	1.288%	1.288%	1.288%	1.288%	1.288%
Designated as cash flow hedges \| Interest Rate Swaps \| Consolidated leverage ratio (the Ratio) less than 1.00 to 1.00
Derivative [Line Items]
Applicable margin based on the Company's consolidated leverage ratio (as a percent)				1.50%
Consolidated leverage ratio used to calculate variable rate of debt (as a percent)						1	1	1	1	1	1	1
Designated as cash flow hedges \| Interest Rate Swaps \| Consolidated leverage ratio (the Ratio) greater than 2.00 to 1.00
Derivative [Line Items]
Applicable margin based on the Company's consolidated leverage ratio (as a percent)				2.75%
Consolidated leverage ratio used to calculate variable rate of debt (as a percent)						3	3	3	3	3	3	3
Amount Reclassified from AOCI \| Cash Flow Hedges
Derivative [Line Items]
Gain (loss) reclassified into earnings		$ 0	$ 0	$ 0	$ 0