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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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Jan. 28, 2023 | Jan. 29, 2022 | Jan. 30, 2021
Income Tax Disclosure [Abstract] |  |  |
US federal income tax rates | 21.00% | 21.00% | 21.00%
US state income taxes | 2.90% | 3.30% | 4.10%
Differences between US federal and foreign statutory income tax rates | 0.80% | (0.10%) | 0.10%
Expenditures permanently disallowable for tax purposes, net of permanent tax benefits | (1.40%) | 0.00% | (4.70%)
Impact of global reinsurance arrangements | (8.70%) | (2.20%) | 14.10%
Impact of global financing arrangements | (2.20%) | (0.60%) | 0.00%
Impairment of goodwill | 0.00% | 0.00% | (2.40%)
CARES Act | 0.00% | (1.40%) | 111.90%
Valuation allowance | 0.00% | (6.50%) | (55.50%)
Other items | 4.10% | (0.60%) | (5.50%)
Effective tax rate | 16.50% | 12.90% | 83.10%

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