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Income taxes - Schedule of Reconciliation of Statutory Tax Rate to Effective Tax Rate (Details)	12 Months Ended
	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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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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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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