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Retirement plans - Narrative (Details) £ in Millions, $ in Millions	3 Months Ended				6 Months Ended		24 Months Ended
	Jul. 29, 2023 USD ($)	Apr. 29, 2023 USD ($)	Jul. 30, 2022 USD ($)	Apr. 30, 2022 USD ($)	Jul. 29, 2023 USD ($)	Jul. 30, 2022 USD ($)	Jul. 29, 2023 GBP (£)	Jul. 29, 2023 USD ($)	Jul. 29, 2021 employee
Defined Contribution Plan [Line Items]
Number of pension scheme members | employee									1,909
Pension scheme | Foreign Plan
Defined Contribution Plan [Line Items]
Pre-tax non-cash settlement charges	$ 0.0	$ 0.2	$ 0.9	$ 131.9	$ 0.2	$ 132.8
Signet Group Limited | Pension scheme
Defined Contribution Plan [Line Items]
Contributions by employer							£ 15.0	$ 20.1
Defined benefit plan, expected future employer contributions, amount	$ 1.0				$ 1.0			$ 1.0

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