XML 83 R71.htm IDEA: XBRL DOCUMENT
v3.22.1

Income taxes - Narrative (Details) $ in Millions | 3 Months Ended
--- | ---
Apr. 30, 2022 USD ($)
Income Tax Disclosure [Abstract] |
Discrete tax benefits related to litigation charges | $ 47.7
Tax benefit due to reversal of foreign pension out of OCI | 25.0
Excess tax benefit from share based compensation | $ 13.0

X
- Definition Effective Income Tax Rate Reconciliation, Litigation Settlement, Amount + References No definition available. + Details
Name: | sig_EffectiveIncomeTaxRateReconciliationLitigationSettlementAmount
Namespace Prefix: | sig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Effective Income Tax Rate Reconciliation, Reversal of Foreign Pension out of Other Comprehensive Income, Amount + References No definition available. + Details
Name: | sig_EffectiveIncomeTaxRateReconciliationReversalOfForeignPensionOutOfOtherComprehensiveIncomeAmount
Namespace Prefix: | sig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120384911&loc=d3e23163-113944 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration