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Commitments and contingencies (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 29, 2023 | Jan. 28, 2023 | Feb. 03, 2024 | Jan. 28, 2023 | Jan. 29, 2022
Loss Contingencies [Line Items] |  |  |  |  |
Purchase Obligation |  | $ 107.0 | $ 53.7 | $ 107.0 |
Guarantor Obligations, Maximum Exposure, Undiscounted |  |  | 32.8 |  |
Gain (Loss) Related to Litigation Settlement |  |  | $ (3.0) | 203.8 | $ 1.7
Equal Pay Act Collective Action |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Gain (Loss) Related to Litigation Settlement |  |  |  | 187.9 |
Litigation settlement, amount awarded to other party |  |  |  | $ 175.0 |
Payments for legal settlements | $ 185.0 |  |  |  |
Other Matters |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Gain (Loss) Related to Litigation Settlement |  | $ 15.9 |  |  |
Payments for legal settlements | $ 15.9 |  |  |  |

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