XML 157 R139.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Share-Based Compensation - Additional Information about Awards Granted under Omnibus Plan (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Feb. 03, 2018 | Jan. 28, 2017 | Jan. 30, 2016
Omnibus Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total intrinsic value of awards vested | $ 7.1 | $ 13.6 | $ 22.2

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

X
- Definition Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=sig_OmnibusPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |