XML 90 R78.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Derivatives - Additional Information (Details) oz in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
May 05, 2018 USD ($) oz | Apr. 29, 2017 USD ($) oz | Jan. 28, 2017 | Feb. 03, 2018 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 | $ 104,300,000 | $ 47,900,000 |  | $ 112,700,000 |
Cash Flow Hedging |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Cash flow hedge gain to be reclassified within twelve months | 2,500,000 |  |  |  |
Cash Flow Hedging | Foreign currency contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, notional amount | $ 22,200,000 | $ 37,400,000 |  | $ 26,600,000 |
Derivative, remaining maturity | 11 months | 12 months | 11 months |  |
Cash Flow Hedging | Commodity contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, remaining maturity | 9 months | 9 months | 12 months |  |
Derivative, notional amount in gold | oz | 5 | 69 |  | 6 |

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: |