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Income taxes - Schedule of Reconciliation of Statutory Tax Rate to Effective Tax Rate (Details)	12 Months Ended
	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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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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