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Loans, overdrafts and long-term debt - Additional Information (Detail) |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 27, 2019 USD ($) | Jul. 31, 2021 USD ($) | Jan. 30, 2021 USD ($) | May 02, 2020 USD ($) | Jan. 29, 2022 USD ($) | Jan. 30, 2021 USD ($) | Feb. 01, 2020 USD ($) | Jul. 28, 2021 USD ($) | May 19, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Repayments of senior debt |  |  |  |  | $ 0 | $ 0 | $ 241,500,000 |  |
Gain on extinguishment of debt |  |  |  |  | 0 | (400,000) | 6,200,000 |  |
Payment of debt issuance costs |  |  |  |  | 3,900,000 | 0 | 9,300,000 |  |
Proceeds from revolving credit facilities |  |  |  |  | 0 | 900,000,000.0 | 858,300,000 |  |
Senior Unsecured Notes Due in 2024 | Signet UK Finance plc |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  | $ 400,000,000
Stated interest rate |  |  |  |  |  |  |  |  | 4.70%
Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  |  |  |  | 2,000,000 |  |
Senior Unsecured Notes Due in 2024 | Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  |  |  |  | 2,600,000 |  |
Repayments of senior debt | $ 239,600,000 |  |  |  |  |  |  |  |
Redemption price per $1,000 of principal amount | 950.00 |  |  |  |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  | 8,200,000 |  |
Payment for debt extinguishment third party fees |  |  |  |  |  |  | 1,900,000 |  |
Unamortized debt issuance expense |  |  | $ 900,000 |  | 600,000 | 900,000 |  |  |
Amortization related to capitalized fees |  |  |  |  | 300,000 | 200,000 | 600,000 |  |
Senior Asset-Based Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Unamortized debt issuance expense |  |  | 6,400,000 |  | 8,300,000 | 6,400,000 |  |  |
Amortization related to capitalized fees |  |  |  |  | 2,000,000 | $ 1,700,000 | $ 600,000 |  |
Term Loan Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  | $ 400,000 |  |  |  |  |  |
Term Loan Facility | Senior Asset-Based Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  | $ 100,000,000 |  |  |  |
Term Loan Facility | Senior Asset-Based Credit Facility | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate at period end |  |  | 1.70% |  | 1.40% | 1.70% |  |  |
Revolving Credit Facility | Senior Asset-Based Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity | $ 1,500,000,000 |  |  |  |  |  |  |  |
Additional borrowing capacity |  |  |  |  |  |  |  | $ 600,000,000 |
Payment of debt issuance costs |  | $ 3,900,000 |  |  |  |  |  |  |
Stand-by letters of credit |  |  | $ 19,000,000 |  | $ 20,100,000 | $ 19,000,000 |  |  |
Line of credit facility, remaining borrowing capacity |  |  | $ 1,300,000,000 |  | $ 1,200,000,000 | $ 1,300,000,000 |  |  |
Proceeds from revolving credit facilities |  |  |  | $ 900,000,000 |  |  |  |  |
Covenant, minimum coverage ratio |  |  |  |  | 1.00 |  |  |  |
Debt covenant, fixed covenant ratio threshold |  |  |  |  | $ 119,000,000 |  |  |  |
Capitalized fees |  |  |  |  | $ 12,600,000 |  |  |  |

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