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Accrued expenses and other current liabilities - Narrative (Details)	12 Months Ended
	Jan. 28, 2023
Payables and Accruals [Abstract]
Lifetime diamond guarantee inspection period	6 months

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- Definition

US Division Required Inspection Period For Lifetime Gemstone Guarantee

+ References

No definition available.

+ Details

Name:	sig_USDivisionRequiredInspectionPeriodForLifetimeGemstoneGuarantee
Namespace Prefix:	sig_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration