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Income taxes - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Nov. 01, 2025	Nov. 02, 2024
Effective Income Tax Rate Reconciliation [Line Items]
Goodwill impairment	$ 53.6	$ 123.0
Excess tax benefit from share based compensation	$ 0.6	5.0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount		$ 166.0
BERMUDA
Effective Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	15.00%

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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