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Loans, overdrafts and long-term debt - Narrative (Details) - USD ($)	Sep. 05, 2019	Apr. 29, 2023	Jan. 28, 2023	Apr. 30, 2022	Jul. 28, 2021	Sep. 27, 2019	Sep. 06, 2019	May 19, 2014
Senior Unsecured Notes Due in 2024 | Senior Notes
Debt Instrument [Line Items]
Face amount							$ 147,800,000
Repayments of senior debt	$ 239,600,000
Redemption price per $1,000 of principal amount	$ 950.00
Senior Unsecured Notes Due in 2024 | Senior Notes | Signet UK Finance plc
Debt Instrument [Line Items]
Face amount								$ 400,000,000
Stated interest rate								4.70%
Senior Asset-Based Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 1,500,000,000
Additional borrowing capacity					$ 600,000,000
Long-term debt		$ 0	$ 0	$ 0
Available borrowing capacity		$ 1,300,000,000
Senior Asset-Based Credit Facility | Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Face amount						$ 100,000,000

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