XML 65 R53.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Revenue recognition - Rollforward (Details) - Sterling Jewelers - USD ($) $ in Millions | 3 Months Ended
--- | ---
May 05, 2018 | Apr. 29, 2017
Movement in Deferred Revenue [Roll Forward] |  |
ESP deferred revenue, beginning of period | $ 916.1 | $ 905.6
Plans sold | 96.0 | 96.6
Revenue recognized | (98.6) | (98.5)
ESP deferred revenue, end of period | $ 913.5 | $ 903.7

X
- Definition Deferred Revenue Warranty + References No definition available. + Details
Name: | sig_DeferredRevenueWarranty
Namespace Prefix: | sig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Product Warranty, Revenues Recognized + References No definition available. + Details
Name: | sig_ProductWarrantyRevenuesRecognized
Namespace Prefix: | sig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_MovementInDeferredRevenueRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in the standard and extended product warranty accrual from warranties issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
Name: | us-gaap_ProductWarrantyAccrualWarrantiesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sig_SterlingJewelersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |