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Income taxes - Schedule of Reconciliation of Statutory Tax Rate to Effective Tax Rate (Details) | 12 Months Ended
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Feb. 03, 2024 | Jan. 28, 2023 | Jan. 29, 2022
Income Tax Disclosure [Abstract] |  |  |
US federal income tax rates | 21.00% | 21.00% | 21.00%
US state income taxes | 2.70% | 2.90% | 3.30%
Differences between US federal and foreign statutory income tax rates | 0.40% | 0.80% | (0.10%)
Expenditures permanently disallowable for tax purposes, net of permanent tax benefits | (0.40%) | (1.40%) | 0.00%
Impact of global reinsurance arrangements | (5.80%) | (8.70%) | (2.20%)
Impact of global financing arrangements | (1.50%) | (2.20%) | (0.60%)
Bermuda economic transition adjustment | (41.10%) | 0.00% | 0.00%
CARES Act | 0.00% | 0.00% | (1.40%)
Valuation allowance | (0.30%) | 0.00% | (6.50%)
Other items | (1.70%) | 4.10% | (0.60%)
Effective tax rate | (26.70%) | 16.50% | 12.90%

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