XML 87 R75.htm IDEA: XBRL DOCUMENT v3.8.0.1

Derivatives - Additional Information (Details) oz in Thousands	3 Months Ended
	Oct. 28, 2017 USD ($) oz	Jan. 28, 2017 USD ($) oz	Oct. 29, 2016 USD ($) oz	Mar. 31, 2015 USD ($)
Interest rate swaps
Derivative [Line Items]
Derivative, notional amount				$ 300,000,000
Foreign currency contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	$ 48,100,000	$ 117,800,000	$ 53,200,000
Cash Flow Hedging
Derivative [Line Items]
Cash flow hedge gain to be reclassified within twelve months	2,000,000
Cash Flow Hedging | Foreign currency contracts
Derivative [Line Items]
Derivative, notional amount	$ 38,400,000	$ 37,800,000	$ 27,800,000
Derivative, remaining maturity	11 months	12 months	15 months
Cash Flow Hedging | Commodity contracts
Derivative [Line Items]
Derivative, remaining maturity	9 months	12 months	15 months
Derivative, notional amount in gold | oz	19	94	57

X

- 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

X

- Definition

Derivative, Notional Amount, Gold

+ References

No definition available.

+ Details

Name:	sig_DerivativeNotionalAmountGold
Namespace Prefix:	sig_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ 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 (c)
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

+ Details

Name:	us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period remaining until the derivative contract matures, 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_DerivativeRemainingMaturity1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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