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Retirement plans - Narrative (Details) £ in Millions, $ in Millions | 3 Months Ended | 12 Months Ended | 18 Months Ended
--- | --- | --- | ---
Apr. 29, 2023 USD ($) | Jan. 28, 2023 USD ($) | Jul. 30, 2022 USD ($) | Apr. 30, 2022 USD ($) | Feb. 01, 2025 USD ($) | Feb. 03, 2024 USD ($) | Jan. 28, 2023 USD ($) | Feb. 04, 2023 USD ($) | Feb. 04, 2023 GBP (£)
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Deferred compensation plan assets |  |  |  |  | $ 31.0 | $ 25.2 |  |  |
Deferred Compensation Liability, Current and Noncurrent |  |  |  |  | 42.1 | 38.5 |  |  |
Life Insurance |  |  |  |  |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Deferred compensation plan assets |  |  |  |  | 4.4 | 5.6 |  |  |
Pension plan | UK Defined Contribution Plan |  |  |  |  |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount |  |  |  |  | 2.1 | 2.4 | $ 2.5 |  |
Pension plan | US 401k Plan |  |  |  |  |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount |  |  |  |  | $ 12.9 | 13.6 | 12.6 |  |
Employer matching contribution, percent of match |  |  |  |  | 50.00% |  |  |  |
Employer matching contribution, maximum, percent of employees' gross pay |  |  |  |  | 6.00% |  |  |  |
Pension plan | Foreign Plan |  |  |  |  |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Pension settlement loss | $ (0.2) | $ (0.9) | $ (0.9) | $ (131.9) |  | (0.2) | (133.7) |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  |  |  |  |  | $ 21.5 | £ 16.1
Other Pension, Postretirement and Supplemental Plans |  |  |  |  |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount |  |  |  |  | $ 7.3 | $ 5.4 | $ 1.7 |  |

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