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Retirement plans - Narrative (Details) £ in Thousands, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 09, 2021 GBP (£) | Jul. 29, 2021 GBP (£) employee | Jul. 29, 2021 USD ($) employee | Jan. 29, 2022 GBP (£) | Jan. 29, 2022 USD ($) | Oct. 30, 2021 GBP (£) | Oct. 30, 2021 USD ($)
Defined Contribution Plan [Line Items] |  |  |  |  |  |  |
Number of pension scheme members | employee |  | 1,909 | 1,909 |  |  |  |
Signet Group Limited | Pension scheme |  |  |  |  |  |  |
Defined Contribution Plan [Line Items] |  |  |  |  |  |  |
Defined benefit plan, expected future employer contributions, amount |  | £ 16,850 | $ 23.4 |  |  |  |
Defined benefit plan, initial contribution amount |  | £ 7,000 | $ 9.7 |  |  |  |
Actuarial loss | £ | £ 53,300 |  |  |  |  |  |
Liability, defined benefit pension plan, noncurrent |  |  |  |  |  | £ 6,200 | $ 8.5
Signet Group Limited | Pension scheme | Scenario, Forecast |  |  |  |  |  |  |
Defined Contribution Plan [Line Items] |  |  |  |  |  |  |
Net periodic pension cost |  |  |  | £ (1,900) | $ (2.6) |  |
Defined benefit plan, amortization |  |  |  | £ 1,700 | $ 2.3 |  |

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