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Loans, overdrafts and long-term debt - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 04, 2018 | Jul. 29, 2017 | Aug. 04, 2018 | Jul. 29, 2017 | Feb. 03, 2018
Debt Instrument [Line Items] |  |  |  |  |
Amortization of financing costs |  |  | $ (1,000,000) | $ (1,100,000) |
Credit Facility | Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit facility, maximum borrowing capacity | $ 700,000,000 |  | 700,000,000 |  |
Capitalized fees | 2,600,000 |  | 2,600,000 |  |
Accumulated amortization of noncurrent deferred finance costs | 1,400,000 | $ 1,000,000 | 1,400,000 | 1,000,000 | $ 1,200,000
Amortization of financing costs | (100,000) | (100,000) | (200,000) | (200,000) |
Letters of credit outstanding | $ 14,600,000 | $ 15,300,000 | $ 14,600,000 | $ 15,300,000 | 15,700,000
Weighted average interest rate | 3.48% | 2.40% | 3.48% | 2.40% |
Credit Facility | Term Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Face amount | $ 357,500,000.0 |  | $ 357,500,000.0 |  |
Capitalized fees | 6,200,000 |  | 6,200,000 |  |
Accumulated amortization of noncurrent deferred finance costs | 3,900,000 | $ 3,100,000 | 3,900,000 | $ 3,100,000 | 3,500,000
Amortization of financing costs | $ (200,000) | $ (200,000) | $ (400,000) | $ (400,000) |
Weighted average interest rate | 3.32% | 2.25% | 3.32% | 2.25% |
Signet UK Finance plc | Senior Unsecured Notes Due in 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Face amount | $ 400,000,000 |  | $ 400,000,000 |  |
Capitalized fees | 7,000,000 |  | 7,000,000 |  |
Accumulated amortization of noncurrent deferred finance costs | 2,900,000 | $ 2,200,000 | 2,900,000 | $ 2,200,000 | $ 2,600,000
Amortization of financing costs | $ (200,000) | $ (100,000) | $ (300,000) | $ (300,000) |
Stated interest rate | 4.70% |  | 4.70% |  |

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